🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 77 (from laksa018)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa077.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical, ml_categories_json AS ml_categories_json, ml_types_json AS ml_types_json, ml_intent_types_json AS ml_intent_types_json, meta_language AS meta_language, attrs_author AS attrs_author, ifNull(toUnixTimestamp(attrs_publish_time), 0) AS attrs_publish_time, ifNull(toUnixTimestamp(attrs_original_publish_time), 0) AS attrs_original_publish_time, ifNull(attrs_is_republished, 0) AS attrs_is_republished, ifNull(attrs_nr_words, 0) AS attrs_nr_words, ifNull(attrs_boilerpipe_nr_words, 0) AS attrs_boilerpipe_nr_words, ifNull(body_ext_links_number, 0) AS body_ext_links_number, ifNull(body_int_links_number, 0) AS body_int_links_number, ifNull(meta_nofollow, 0) AS meta_nofollow, ifNull(meta_noarchive, 0) AS meta_noarchive, ifNull(props_was_rendered, 0) AS props_was_rendered, ifNull(src_redirect, \'\') AS src_redirect, ifNull(download_time_msec, 0) AS download_time_msec, ifNull(download_ttfb_msec, 0) AS download_ttfb_msec, ifNull(download_size, 0) AS download_size FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://kidshealth.org/en/teens/sleep-start.html\')), getAhrefsUnparsedNoserviceFromURL(\'https://kidshealth.org/en/teens/sleep-start.html\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/kidshealth.org\/en\/teens\/sleep-start.html","crawl_time":1776346874,"first_indexed_time":1519424675,"http_code":200,"src_unparsed":"org,kidshealth!\/en\/teens\/sleep-start.html s443","src_root_hash":"11780170919675751477","history_drop_reason":null,"meta_title":"Why Does My Body Jerk Before I Fall Asleep? (for Teens) | Nemours KidsHealth","meta_descriptions":["This body movement is called a hypnic (or hypnagogic) or myoclonic jerk."],"attrs_boilerpipe_text":"Often, as I'm going to sleep I suddenly jerk awake. And sometimes it feels like I'm falling down. What's going on?\nThis body movement is what doctors and scientists call a\nhypnic\n(or hypnagogic) or\nmyoclonic\njerk. It's also known as a \"sleep start,\" and it can literally startle you out of falling asleep. This type of feeling is normal, and it can happen before people enter the deeper stages of sleep.\nDoctors and scientists aren't really sure why our bodies do this, but they have a few theories. One is that the brain misunderstands what's going on as our muscles relax before sleep. It's normal for the muscles to relax, of course, but the brain gets confused. For a minute, it thinks you're falling. In response, the brain causes your muscles to tense as a way to \"catch yourself\" before falling down — and that makes your body jerk.\nThese body jerks can wake you up with a start — but they're nothing to worry about. Lots of people fall right back asleep afterward.","attrs_markdown":"[\\[Skip to Content\\]](https:\/\/kidshealth.org\/en\/teens\/sleep-start.html#thelou)\n\nFind care at   [Nemours Children's Health](https:\/\/www.nemours.org\/?external_id=RE2350835010600)  [Doctors](https:\/\/www.nemours.org\/find-a-doctor.html?external_id=RE2350835010600)  [Locations](https:\/\/www.nemours.org\/locations.html?external_id=RE2350835010600)\n\n[![Nemours TeensHealth](https:\/\/kidshealth.org\/content\/dam\/kidshealth\/nemours-teenshealth-logo.svg)](https:\/\/kidshealth.org\/en\/teens.html\/)\n\n- For Parents\n- For Kids\n- For Teens\n- For Educators\n\nSearch\n\nMenu\n\n[![Nemours TeensHealth](https:\/\/kidshealth.org\/content\/dam\/kidshealth\/nemours-teenshealth-logo.svg)](https:\/\/kidshealth.org\/en\/teens.html\/)\n\nClose Menu\n\n- For Parents\n- For Kids\n- For Teens\n- For Educators\n\nBack\n\nFeatured Topics\n\nFor Parents\n\n- [Sitio para padres](https:\/\/kidshealth.org\/es\/parents\/)\n- [Parents Home](https:\/\/kidshealth.org\/en\/parents\/)\n- [General Health](https:\/\/kidshealth.org\/en\/parents\/general\/)\n- [Growth & Development](https:\/\/kidshealth.org\/en\/parents\/growth\/)\n- [Infections](https:\/\/kidshealth.org\/en\/parents\/infections\/)\n- [Diseases & Conditions](https:\/\/kidshealth.org\/en\/parents\/medical\/)\n- [Pregnancy & Baby](https:\/\/kidshealth.org\/en\/parents\/pregnancy-newborn\/)\n- [Nutrition & Fitness](https:\/\/kidshealth.org\/en\/parents\/nutrition-center\/)\n- [Emotions & Behavior](https:\/\/kidshealth.org\/en\/parents\/emotions\/)\n- [School & Family Life](https:\/\/kidshealth.org\/en\/parents\/positive\/)\n- [First Aid & Safety](https:\/\/kidshealth.org\/en\/parents\/firstaid-safe\/)\n- [Doctors & Hospitals](https:\/\/kidshealth.org\/en\/parents\/system\/)\n- [Videos](https:\/\/kidshealth.org\/en\/parents\/videos\/)\n- [Expert Answers (Q\\&A)](https:\/\/kidshealth.org\/en\/parents\/recipes\/)\n- [All Categories](https:\/\/kidshealth.org\/en\/parents\/all-categories.html)\n- [All Wellness Centers](https:\/\/kidshealth.org\/en\/parents\/centers\/center.html)\n\n[![](https:\/\/kidshealth.org\/content\/dam\/kh-reskin\/menu-promo-kid-30th.png) Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More](https:\/\/kidshealth.org\/en\/parents\/celebrating-30-years.html)\n\n- [Parents Home](https:\/\/kidshealth.org\/en\/parents\/)\n- [Sitio para padres](https:\/\/kidshealth.org\/es\/parents\/)\n- [All Categories](https:\/\/kidshealth.org\/en\/parents\/all-categories.html)\n- [All Wellness Centers](https:\/\/kidshealth.org\/en\/parents\/centers\/center.html)\n\nBack\n\nFeatured Topics\n\nFor Kids\n\n- [Sitio para niños](https:\/\/kidshealth.org\/es\/kids\/)\n- [Kids Home](https:\/\/kidshealth.org\/en\/kids\/)\n- [How the Body Works](https:\/\/kidshealth.org\/en\/kids\/center\/htbw-main-page.html)\n- [Puberty & Growing Up](https:\/\/kidshealth.org\/en\/kids\/grow\/)\n- [Staying Healthy](https:\/\/kidshealth.org\/en\/kids\/stay-healthy\/)\n- [Staying Safe](https:\/\/kidshealth.org\/en\/kids\/watch\/)\n- [Dictionary](https:\/\/kidshealth.org\/en\/kids\/word\/)\n- [Health Problems](https:\/\/kidshealth.org\/en\/kids\/health-problems\/)\n- [Illnesses & Injuries](https:\/\/kidshealth.org\/en\/kids\/ill-injure\/)\n- [Relax & Unwind](https:\/\/kidshealth.org\/en\/kids\/center\/relax-center.html)\n- [People, Places & Things That Help](https:\/\/kidshealth.org\/en\/kids\/feel-better\/)\n- [Feelings](https:\/\/kidshealth.org\/en\/kids\/feeling\/)\n- [Expert Answers (Q\\&A)](https:\/\/kidshealth.org\/en\/kids\/talk\/)\n- [Videos](https:\/\/kidshealth.org\/en\/kids\/videos\/)\n- [All Categories](https:\/\/kidshealth.org\/en\/kids\/all-categories.html)\n- [All Wellness Centers](https:\/\/kidshealth.org\/en\/kids\/centers\/center.html)\n\n[![](https:\/\/kidshealth.org\/content\/dam\/kh-reskin\/menu-promo-kid-30th.png) Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More](https:\/\/kidshealth.org\/en\/parents\/celebrating-30-years.html)\n\n- [Kids Home](https:\/\/kidshealth.org\/en\/kids\/)\n- [Sitio para niños](https:\/\/kidshealth.org\/es\/kids\/)\n- [All Categories](https:\/\/kidshealth.org\/en\/kids\/all-categories.html)\n- [All Wellness Centers](https:\/\/kidshealth.org\/en\/kids\/centers\/center.html)\n\nBack\n\nFeatured Topics\n\nFor Teens\n\n- [Sitio para adolescentes](https:\/\/kidshealth.org\/es\/teens\/)\n- [Teens Home](https:\/\/kidshealth.org\/en\/teens\/)\n- [Body](https:\/\/kidshealth.org\/en\/teens\/your-body\/)\n- [Mind](https:\/\/kidshealth.org\/en\/teens\/your-mind\/)\n- [Sexual Health](https:\/\/kidshealth.org\/en\/teens\/sexual-health\/)\n- [Food & Fitness](https:\/\/kidshealth.org\/en\/teens\/food-fitness\/)\n- [Diseases & Conditions](https:\/\/kidshealth.org\/en\/teens\/diseases-conditions\/)\n- [Infections](https:\/\/kidshealth.org\/en\/teens\/infections\/)\n- [Drugs & Alcohol](https:\/\/kidshealth.org\/en\/teens\/drug-alcohol\/)\n- [School & Jobs](https:\/\/kidshealth.org\/en\/teens\/school-jobs\/)\n- [Sports](https:\/\/kidshealth.org\/en\/teens\/sports-center\/)\n- [Expert Answers (Q\\&A)](https:\/\/kidshealth.org\/en\/teens\/expert\/)\n- [Staying Safe](https:\/\/kidshealth.org\/en\/teens\/safety\/)\n- [Videos](https:\/\/kidshealth.org\/en\/teens\/videos\/)\n- [All Categories](https:\/\/kidshealth.org\/en\/teens\/all-categories.html)\n- [All Wellness Centers](https:\/\/kidshealth.org\/en\/teens\/centers\/center.html)\n\n[![](https:\/\/kidshealth.org\/content\/dam\/kh-reskin\/menu-promo-kid-30th.png) Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More](https:\/\/kidshealth.org\/en\/parents\/celebrating-30-years.html)\n\n- [Teens Home](https:\/\/kidshealth.org\/en\/teens\/)\n- [Sitio para adolescentes](https:\/\/kidshealth.org\/es\/teens\/)\n- [All Categories](https:\/\/kidshealth.org\/en\/teens\/all-categories.html)\n- [All Wellness Centers](https:\/\/kidshealth.org\/en\/teens\/centers\/center.html)\n\n- [KidsHealth](https:\/\/kidshealth.org\/)\n- [For Teens](https:\/\/kidshealth.org\/en\/teens\/)\n- Why Does My Body Jerk Before I Fall Asleep?\n# Why Does My Body Jerk Before I Fall Asleep?\nMedically reviewed by: [KidsHealth Medical ExpertsThis link opens in a new tab](https:\/\/www.nemours.org\/about\/kidshealth-medical-editors.html)\n\n[Learn About Adolescent Medicine & Pediatric Gynecology at Nemours Children's HealthThis link opens in a new tab](https:\/\/www.nemours.org\/services\/pediatric-adolescent-medicine.html)\n\n- [Listen](https:\/\/app-na.readspeaker.com\/cgi-bin\/rsent?customerid=5202&lang=en_us&readid=khcontent_article&url=kidshealth.org\/en\/teens\/sleep-start.html \"Listen to this page using ReadSpeaker\")\n  \n  Play\n  \n  Stop\n  \n  Volume\n  \n  [mp3](https:\/\/app-na.readspeaker.com\/cgi-bin\/rsent?customerid=5202&lang=en_us&readid=khcontent_article&url=kidshealth.org\/en\/teens\/sleep-start.html&audiofilename=KidsHealth_&save=1 \"mp3\")\n  \n  Settings\n  \n  Close Player\n- Larger text size\n  \n  Large text size\n  \n  Regular text size\n- [Print]()\n\n#### Often, as I'm going to sleep I suddenly jerk awake. And sometimes it feels like I'm falling down. What's going on?\nThis body movement is what doctors and scientists call a [hypnic](https:\/\/kidshealth.org\/en\/teens\/sleep-start.html) hypnic(or hypnagogic) or [myoclonic](https:\/\/kidshealth.org\/en\/teens\/sleep-start.html) myoclonicjerk. It's also known as a \"sleep start,\" and it can literally startle you out of falling asleep. This type of feeling is normal, and it can happen before people enter the deeper stages of sleep.\n\nDoctors and scientists aren't really sure why our bodies do this, but they have a few theories. One is that the brain misunderstands what's going on as our muscles relax before sleep. It's normal for the muscles to relax, of course, but the brain gets confused. For a minute, it thinks you're falling. In response, the brain causes your muscles to tense as a way to \"catch yourself\" before falling down — and that makes your body jerk.\n\nThese body jerks can wake you up with a start — but they're nothing to worry about. Lots of people fall right back asleep afterward.\n\n**Medically reviewed by:** [KidsHealth Medical ExpertsThis link opens in a new tab](https:\/\/www.nemours.org\/about\/kidshealth-medical-editors.html)\n\n## More on this topic for:\n- Teens\n\n## More on this topic For Teens\n- [How Can I Deal With Nightmares?](https:\/\/kidshealth.org\/en\/teens\/expert-nightmares.html)\n- [Common Sleep Problems](https:\/\/kidshealth.org\/en\/teens\/sleep.html)\n- [How Much Sleep Do I Need?](https:\/\/kidshealth.org\/en\/teens\/how-much-sleep.html)\n- [5 Ideas for Better Sleep](https:\/\/kidshealth.org\/en\/teens\/tips-sleep.html)\n- [Why Do I Feel Paralyzed Before I Fall Asleep?](https:\/\/kidshealth.org\/en\/teens\/sleep-paralysis.html)\n- [Is it OK to Sleep Less on Weekdays and More on Weekends?](https:\/\/kidshealth.org\/en\/teens\/sleeping-in.html)\n\nView more\n\nShare:\n\n- Share to Facebook\n- Share to Twitter\n- Share to Pinterest\n\n## RELATED CATEGORY\n- [Sleep](https:\/\/kidshealth.org\/en\/teens\/expert\/sleep.html)\n\n\/content\/kidshealth\/misc\/medicalcodes\/teens\/articles\/sleep-start\n\n##### Who We Are\n- [About Us](https:\/\/kidshealth.org\/en\/teens\/about.html)\n\n##### Working With Us\n- [Partners](https:\/\/kidshealth.org\/en\/parents\/partners.html)\n- [Editorial Policy](https:\/\/kidshealth.org\/en\/teens\/editorial-policy.html)\n- [Permissions Guidelines](https:\/\/kidshealth.org\/en\/parents\/permissions-guidelines.html)\n- [Media Requests This link opens in a new tab](https:\/\/nemours.mediaroom.com\/journalist-resources)\n- [Contact Us](https:\/\/kidshealth.org\/en\/teens\/general-information\/contact-us)\n\n##### Legal & Privacy\n- [Privacy Policy & Terms of Use](https:\/\/kidshealth.org\/en\/teens\/policy.html)\n- [Notice of Nondiscrimination](https:\/\/kidshealth.org\/en\/parents\/nondiscrimination.html)\n\n##### All Categories\n- [For Parents](https:\/\/kidshealth.org\/en\/parents\/all-categories.html)\n- [For Kids](https:\/\/kidshealth.org\/en\/kids\/all-categories.html)\n- [For Teens](https:\/\/kidshealth.org\/en\/teens\/all-categories.html)\n##### Wellness Centers\n- [For Parents](https:\/\/kidshealth.org\/en\/parents\/centers\/center.html)\n- [For Kids](https:\/\/kidshealth.org\/en\/kids\/centers\/center.html)\n- [For Teens](https:\/\/kidshealth.org\/en\/teens\/centers\/center.html)\n\n- [![Nemours KidsHealth on Facebook](https:\/\/kidshealth.org\/content\/dam\/kh-reskin\/iconFacebookWhite.svg)](https:\/\/www.facebook.com\/nemourskidshealth\/)\n- [![Nemours KidsHealth on X](https:\/\/kidshealth.org\/content\/dam\/kh-reskin\/iconTwitterWhite.svg)](https:\/\/x.com\/nemours)\n- [![Nemours KidsHealth on YouTube](https:\/\/kidshealth.org\/content\/dam\/kh-reskin\/iconYoutubeWhite.svg)](https:\/\/www.youtube.com\/@NemoursKidsHealth)\n\n[![Nemours](https:\/\/kidshealth.org\/content\/dam\/kidshealth\/logo-nemours_KidsHealth.svg)](https:\/\/www.nemours.org\/?external_id=RE2350803010600)\n\nNote: All information on Nemours KidsHealth® is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2026. The Nemours Foundation. Nemours Children's Health®, Nemours KidsHealth®, KidsHealth®, and Well Beyond Medicine® are registered trademarks of The Nemours Foundation. All rights reserved. Images sourced by The Nemours Foundation and Getty Images.","attrs_readable_markdown":"#### Often, as I'm going to sleep I suddenly jerk awake. And sometimes it feels like I'm falling down. What's going on?\nThis body movement is what doctors and scientists call a [hypnic](https:\/\/kidshealth.org\/en\/teens\/sleep-start.html) (or hypnagogic) or [myoclonic](https:\/\/kidshealth.org\/en\/teens\/sleep-start.html) jerk. It's also known as a \"sleep start,\" and it can literally startle you out of falling asleep. This type of feeling is normal, and it can happen before people enter the deeper stages of sleep.\n\nDoctors and scientists aren't really sure why our bodies do this, but they have a few theories. One is that the brain misunderstands what's going on as our muscles relax before sleep. It's normal for the muscles to relax, of course, but the brain gets confused. For a minute, it thinks you're falling. In response, the brain causes your muscles to tense as a way to \"catch yourself\" before falling down — and that makes your body jerk.\n\nThese body jerks can wake you up with a start — but they're nothing to worry about. Lots of people fall right back asleep afterward.","meta_canonical":null,"ml_categories_json":"{\"\/Health\":994,\"\/Health\/Mental_Health\":685,\"\/Health\/Mental_Health\/Anxiety_and_Stress\":404}","ml_types_json":"{\"\/Article\":983,\"\/Article\/FAQ\":572}","ml_intent_types_json":"{\"Informational\":999}","meta_language":"en","attrs_author":null,"attrs_publish_time":0,"attrs_original_publish_time":1519424675,"attrs_is_republished":0,"attrs_nr_words":"705","attrs_boilerpipe_nr_words":"175","body_ext_links_number":16,"body_int_links_number":68,"meta_nofollow":0,"meta_noarchive":0,"props_was_rendered":1,"src_redirect":"","download_time_msec":170,"download_ttfb_msec":170,"download_size":11476}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

8 days ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0.3 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property

Value

URL

https://kidshealth.org/en/teens/sleep-start.html

Last Crawled

2026-04-16 13:41:14 (8 days ago)

First Indexed

2018-02-23 22:24:35 (8 years ago)

HTTP Status Code

200

Content

Meta Title

Why Does My Body Jerk Before I Fall Asleep? (for Teens) | Nemours KidsHealth

Meta Description

This body movement is called a hypnic (or hypnagogic) or myoclonic jerk.

Meta Canonical

null

Boilerpipe Text

Often, as I'm going to sleep I suddenly jerk awake. And sometimes it feels like I'm falling down. What's going on? This body movement is what doctors and scientists call a hypnic (or hypnagogic) or myoclonic jerk. It's also known as a "sleep start," and it can literally startle you out of falling asleep. This type of feeling is normal, and it can happen before people enter the deeper stages of sleep. Doctors and scientists aren't really sure why our bodies do this, but they have a few theories. One is that the brain misunderstands what's going on as our muscles relax before sleep. It's normal for the muscles to relax, of course, but the brain gets confused. For a minute, it thinks you're falling. In response, the brain causes your muscles to tense as a way to "catch yourself" before falling down — and that makes your body jerk. These body jerks can wake you up with a start — but they're nothing to worry about. Lots of people fall right back asleep afterward.

Markdown

[\[Skip to Content\]](https://kidshealth.org/en/teens/sleep-start.html#thelou) Find care at [Nemours Children's Health](https://www.nemours.org/?external_id=RE2350835010600) [Doctors](https://www.nemours.org/find-a-doctor.html?external_id=RE2350835010600) [Locations](https://www.nemours.org/locations.html?external_id=RE2350835010600) [![Nemours TeensHealth](https://kidshealth.org/content/dam/kidshealth/nemours-teenshealth-logo.svg)](https://kidshealth.org/en/teens.html/) - For Parents - For Kids - For Teens - For Educators Search Menu [![Nemours TeensHealth](https://kidshealth.org/content/dam/kidshealth/nemours-teenshealth-logo.svg)](https://kidshealth.org/en/teens.html/) Close Menu - For Parents - For Kids - For Teens - For Educators Back Featured Topics For Parents - [Sitio para padres](https://kidshealth.org/es/parents/) - [Parents Home](https://kidshealth.org/en/parents/) - [General Health](https://kidshealth.org/en/parents/general/) - [Growth & Development](https://kidshealth.org/en/parents/growth/) - [Infections](https://kidshealth.org/en/parents/infections/) - [Diseases & Conditions](https://kidshealth.org/en/parents/medical/) - [Pregnancy & Baby](https://kidshealth.org/en/parents/pregnancy-newborn/) - [Nutrition & Fitness](https://kidshealth.org/en/parents/nutrition-center/) - [Emotions & Behavior](https://kidshealth.org/en/parents/emotions/) - [School & Family Life](https://kidshealth.org/en/parents/positive/) - [First Aid & Safety](https://kidshealth.org/en/parents/firstaid-safe/) - [Doctors & Hospitals](https://kidshealth.org/en/parents/system/) - [Videos](https://kidshealth.org/en/parents/videos/) - [Expert Answers (Q\&A)](https://kidshealth.org/en/parents/recipes/) - [All Categories](https://kidshealth.org/en/parents/all-categories.html) - [All Wellness Centers](https://kidshealth.org/en/parents/centers/center.html) [![](https://kidshealth.org/content/dam/kh-reskin/menu-promo-kid-30th.png) Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More](https://kidshealth.org/en/parents/celebrating-30-years.html) - [Parents Home](https://kidshealth.org/en/parents/) - [Sitio para padres](https://kidshealth.org/es/parents/) - [All Categories](https://kidshealth.org/en/parents/all-categories.html) - [All Wellness Centers](https://kidshealth.org/en/parents/centers/center.html) Back Featured Topics For Kids - [Sitio para niños](https://kidshealth.org/es/kids/) - [Kids Home](https://kidshealth.org/en/kids/) - [How the Body Works](https://kidshealth.org/en/kids/center/htbw-main-page.html) - [Puberty & Growing Up](https://kidshealth.org/en/kids/grow/) - [Staying Healthy](https://kidshealth.org/en/kids/stay-healthy/) - [Staying Safe](https://kidshealth.org/en/kids/watch/) - [Dictionary](https://kidshealth.org/en/kids/word/) - [Health Problems](https://kidshealth.org/en/kids/health-problems/) - [Illnesses & Injuries](https://kidshealth.org/en/kids/ill-injure/) - [Relax & Unwind](https://kidshealth.org/en/kids/center/relax-center.html) - [People, Places & Things That Help](https://kidshealth.org/en/kids/feel-better/) - [Feelings](https://kidshealth.org/en/kids/feeling/) - [Expert Answers (Q\&A)](https://kidshealth.org/en/kids/talk/) - [Videos](https://kidshealth.org/en/kids/videos/) - [All Categories](https://kidshealth.org/en/kids/all-categories.html) - [All Wellness Centers](https://kidshealth.org/en/kids/centers/center.html) [![](https://kidshealth.org/content/dam/kh-reskin/menu-promo-kid-30th.png) Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More](https://kidshealth.org/en/parents/celebrating-30-years.html) - [Kids Home](https://kidshealth.org/en/kids/) - [Sitio para niños](https://kidshealth.org/es/kids/) - [All Categories](https://kidshealth.org/en/kids/all-categories.html) - [All Wellness Centers](https://kidshealth.org/en/kids/centers/center.html) Back Featured Topics For Teens - [Sitio para adolescentes](https://kidshealth.org/es/teens/) - [Teens Home](https://kidshealth.org/en/teens/) - [Body](https://kidshealth.org/en/teens/your-body/) - [Mind](https://kidshealth.org/en/teens/your-mind/) - [Sexual Health](https://kidshealth.org/en/teens/sexual-health/) - [Food & Fitness](https://kidshealth.org/en/teens/food-fitness/) - [Diseases & Conditions](https://kidshealth.org/en/teens/diseases-conditions/) - [Infections](https://kidshealth.org/en/teens/infections/) - [Drugs & Alcohol](https://kidshealth.org/en/teens/drug-alcohol/) - [School & Jobs](https://kidshealth.org/en/teens/school-jobs/) - [Sports](https://kidshealth.org/en/teens/sports-center/) - [Expert Answers (Q\&A)](https://kidshealth.org/en/teens/expert/) - [Staying Safe](https://kidshealth.org/en/teens/safety/) - [Videos](https://kidshealth.org/en/teens/videos/) - [All Categories](https://kidshealth.org/en/teens/all-categories.html) - [All Wellness Centers](https://kidshealth.org/en/teens/centers/center.html) [![](https://kidshealth.org/content/dam/kh-reskin/menu-promo-kid-30th.png) Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More](https://kidshealth.org/en/parents/celebrating-30-years.html) - [Teens Home](https://kidshealth.org/en/teens/) - [Sitio para adolescentes](https://kidshealth.org/es/teens/) - [All Categories](https://kidshealth.org/en/teens/all-categories.html) - [All Wellness Centers](https://kidshealth.org/en/teens/centers/center.html) - [KidsHealth](https://kidshealth.org/) - [For Teens](https://kidshealth.org/en/teens/) - Why Does My Body Jerk Before I Fall Asleep? # Why Does My Body Jerk Before I Fall Asleep? Medically reviewed by: [KidsHealth Medical ExpertsThis link opens in a new tab](https://www.nemours.org/about/kidshealth-medical-editors.html) [Learn About Adolescent Medicine & Pediatric Gynecology at Nemours Children's HealthThis link opens in a new tab](https://www.nemours.org/services/pediatric-adolescent-medicine.html) - [Listen](https://app-na.readspeaker.com/cgi-bin/rsent?customerid=5202&lang=en_us&readid=khcontent_article&url=kidshealth.org/en/teens/sleep-start.html "Listen to this page using ReadSpeaker") Play Stop Volume [mp3](https://app-na.readspeaker.com/cgi-bin/rsent?customerid=5202&lang=en_us&readid=khcontent_article&url=kidshealth.org/en/teens/sleep-start.html&audiofilename=KidsHealth_&save=1 "mp3") Settings Close Player - Larger text size Large text size Regular text size - [Print]() #### Often, as I'm going to sleep I suddenly jerk awake. And sometimes it feels like I'm falling down. What's going on? This body movement is what doctors and scientists call a [hypnic](https://kidshealth.org/en/teens/sleep-start.html) hypnic(or hypnagogic) or [myoclonic](https://kidshealth.org/en/teens/sleep-start.html) myoclonicjerk. It's also known as a "sleep start," and it can literally startle you out of falling asleep. This type of feeling is normal, and it can happen before people enter the deeper stages of sleep. Doctors and scientists aren't really sure why our bodies do this, but they have a few theories. One is that the brain misunderstands what's going on as our muscles relax before sleep. It's normal for the muscles to relax, of course, but the brain gets confused. For a minute, it thinks you're falling. In response, the brain causes your muscles to tense as a way to "catch yourself" before falling down — and that makes your body jerk. These body jerks can wake you up with a start — but they're nothing to worry about. Lots of people fall right back asleep afterward. **Medically reviewed by:** [KidsHealth Medical ExpertsThis link opens in a new tab](https://www.nemours.org/about/kidshealth-medical-editors.html) ## More on this topic for: - Teens ## More on this topic For Teens - [How Can I Deal With Nightmares?](https://kidshealth.org/en/teens/expert-nightmares.html) - [Common Sleep Problems](https://kidshealth.org/en/teens/sleep.html) - [How Much Sleep Do I Need?](https://kidshealth.org/en/teens/how-much-sleep.html) - [5 Ideas for Better Sleep](https://kidshealth.org/en/teens/tips-sleep.html) - [Why Do I Feel Paralyzed Before I Fall Asleep?](https://kidshealth.org/en/teens/sleep-paralysis.html) - [Is it OK to Sleep Less on Weekdays and More on Weekends?](https://kidshealth.org/en/teens/sleeping-in.html) View more Share: - Share to Facebook - Share to Twitter - Share to Pinterest ## RELATED CATEGORY - [Sleep](https://kidshealth.org/en/teens/expert/sleep.html) /content/kidshealth/misc/medicalcodes/teens/articles/sleep-start ##### Who We Are - [About Us](https://kidshealth.org/en/teens/about.html) ##### Working With Us - [Partners](https://kidshealth.org/en/parents/partners.html) - [Editorial Policy](https://kidshealth.org/en/teens/editorial-policy.html) - [Permissions Guidelines](https://kidshealth.org/en/parents/permissions-guidelines.html) - [Media Requests This link opens in a new tab](https://nemours.mediaroom.com/journalist-resources) - [Contact Us](https://kidshealth.org/en/teens/general-information/contact-us) ##### Legal & Privacy - [Privacy Policy & Terms of Use](https://kidshealth.org/en/teens/policy.html) - [Notice of Nondiscrimination](https://kidshealth.org/en/parents/nondiscrimination.html) ##### All Categories - [For Parents](https://kidshealth.org/en/parents/all-categories.html) - [For Kids](https://kidshealth.org/en/kids/all-categories.html) - [For Teens](https://kidshealth.org/en/teens/all-categories.html) ##### Wellness Centers - [For Parents](https://kidshealth.org/en/parents/centers/center.html) - [For Kids](https://kidshealth.org/en/kids/centers/center.html) - [For Teens](https://kidshealth.org/en/teens/centers/center.html) - [![Nemours KidsHealth on Facebook](https://kidshealth.org/content/dam/kh-reskin/iconFacebookWhite.svg)](https://www.facebook.com/nemourskidshealth/) - [![Nemours KidsHealth on X](https://kidshealth.org/content/dam/kh-reskin/iconTwitterWhite.svg)](https://x.com/nemours) - [![Nemours KidsHealth on YouTube](https://kidshealth.org/content/dam/kh-reskin/iconYoutubeWhite.svg)](https://www.youtube.com/@NemoursKidsHealth) [![Nemours](https://kidshealth.org/content/dam/kidshealth/logo-nemours_KidsHealth.svg)](https://www.nemours.org/?external_id=RE2350803010600) Note: All information on Nemours KidsHealth® is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2026. The Nemours Foundation. Nemours Children's Health®, Nemours KidsHealth®, KidsHealth®, and Well Beyond Medicine® are registered trademarks of The Nemours Foundation. All rights reserved. Images sourced by The Nemours Foundation and Getty Images.

Readable Markdown

#### Often, as I'm going to sleep I suddenly jerk awake. And sometimes it feels like I'm falling down. What's going on? This body movement is what doctors and scientists call a [hypnic](https://kidshealth.org/en/teens/sleep-start.html) (or hypnagogic) or [myoclonic](https://kidshealth.org/en/teens/sleep-start.html) jerk. It's also known as a "sleep start," and it can literally startle you out of falling asleep. This type of feeling is normal, and it can happen before people enter the deeper stages of sleep. Doctors and scientists aren't really sure why our bodies do this, but they have a few theories. One is that the brain misunderstands what's going on as our muscles relax before sleep. It's normal for the muscles to relax, of course, but the brain gets confused. For a minute, it thinks you're falling. In response, the brain causes your muscles to tense as a way to "catch yourself" before falling down — and that makes your body jerk. These body jerks can wake you up with a start — but they're nothing to worry about. Lots of people fall right back asleep afterward.

ML Classification

ML Categories

/Health		99.4%
/Health/Mental_Health		68.5%
/Health/Mental_Health/Anxiety_and_Stress		40.4%

Raw JSON

{
    "/Health": 994,
    "/Health/Mental_Health": 685,
    "/Health/Mental_Health/Anxiety_and_Stress": 404
}

ML Page Types

/Article		98.3%
/Article/FAQ		57.2%

Raw JSON

{
    "/Article": 983,
    "/Article/FAQ": 572
}

ML Intent Types

Informational

99.9%

Raw JSON

{
    "Informational": 999
}

Content Metadata

Language

Author

null

Publish Time

not set

Original Publish Time

2018-02-23 22:24:35 (8 years ago)

Republished

Word Count (Total)

705

Word Count (Content)

175

Links

External Links

Internal Links

Technical SEO

Meta Nofollow

Meta Noarchive

JS Rendered

Yes

Redirect Target

null

Performance

Download Time (ms)

170

TTFB (ms)

170

Download Size (bytes)

11,476

Shard

77 (laksa)

Root Hash

11780170919675751477

Unparsed URL

org,kidshealth!/en/teens/sleep-start.html s443