Motor neurons | Muscular-skeletal system physiology | NCLEX-RN | Khan Academy

How do neurons help us move? Learn about how motor neurons send signals to muscle cells and what happens when we damage this precious neurons. By Raja Narayan. . Created by Raja Narayan.
Watch the next lesson: www.khanacadem...
Missed the previous lesson? www.khanacadem...
NCLEX-RN on Khan Academy: A collection of questions from content covered on the NCLEX-RN. These questions are available under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License (available at creativecommons....
About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.
For free. For everyone. Forever. #YouCanLearnAnything
Subscribe to Khan Academy’s NCLEX-RN channel: / @khanacademynclex-rn7898
Subscribe to Khan Academy: www.youtube.co...

[@Kranca2000]

I find the handwriting oddly satisfying

[@2ndchancehypnotherapy]

Same🤗

[@WhimsyMelody]

Raja is solely responsible for me passing my integrative neuroscience and neuroscience & neuropharmacology exams.

[@JohnDoe-ef3nv]

damn

[@thembekandlovu-br6jb]

Then what happened to patients with MND?

[@Anabela2023]

THANK GOD FOR PEOPLE LIKE YOU🙏🏾💕

[@abbywilpers3193]

It's a little confusion to say there is nothing at the Nodes of Ranvier because there's a high density of voltage gated ion channels there allowing the signal to continue through the myelin insulation.

[@matthewetheridge8583]

Exactly, the Nodes of Ranvier are super important because it's the only way the signal "jumps" as the action potentials only happen there. I knew I wasn't the only one lost there.😅

[@user-eb8xb7pp6i]

OMG The way you teach is wonderful! Thank you! :D

[@virupannamedikinal]

Thank you so much Raja Sir

[@xiaoyanzhang1964]

This is the best explanation about upper and lower motor neuron I have watched.

[@mariocesarbenitez5552]

Thank you so much

[@backstreetfan2887]

thank you!

[@nairitasengupta8321]

He made t so easy to understn

[@cherylannG100]

This guy explains it so well- Thank you :)

[@frankieroandMCR]

Ya mama so myelin, omg hahaha

[@sparksmaster8105]

Omg thank you, i have a science test soon so thank you, this helped so much!
:D

[@nathananderson4709]

Ll

[@moncoeurpourvous]

THIS EXISTS
THANK JESUS
THANK SAL KHAN
THANK RAJA NARAYAN

[@TaiganTundra]

Are you okay?

[@shannonfernandes1]

Shirin Ajay raja narayan????😂😂😂😂

[@archie12345]

Who's Jesus? I can't find him in Khan Academy...

[@susymendoza5079]

WOW! Thanks a bunch for making that be more understandable

[@haroldpinteresque4460]

Could one say that upper motor neurons directly innervate muscle fibers to cause muscle contraction and movement, or is it indirectly via the lower motor neurons?

[@epicwarframepvp6389]

Nice, thx

[@shivanisharma6943]

You are awesome, sir. Hats off

[@flamurbedrolli802]

Too much rendundant material in Khan Academy .

[@mr.danielolivobapctcna8322]

That's a great video. What program and device did you use to make this video? Your handwriting is so neat. Your drawings are fine. Please tell. Thank you.

[@reetkahlon2560]

I've been wondering the same thing

[@peterdelbuono2936]

There's actually a butt ton of sodium channels in the nodes, it's not empty by any means

[@backstreetfan2887]

had to google dougie, never heard of that

[@ezzieemeonye539]

amazing...

[@inaina6894]

Awesome explanation! Subscribed and eager to go through all the videos. Thanks for that huge and meaningful work.

[@MsDomomuffin]

All my questions answered, thanks!

[@sayvory]

Cool, very informative and simple, thanks!

[@tedstehr8194]

Very useful to understand my spasticity. Thank you Raja.

[@bobbybob8868]

I thought myelin sheaths were used to make action potentials move faster, but action potentials dissipate as they move through myelinated areas. The nodes of Ranvier boost action potentials as they have voltage-gated sodium channels that open... Also, action potentials don't actually jump from node to node. They just appear to jump because they move slower at non-insulated areas...

[@nihalalik]

beautiful (y)

[@nidarshanjayaganesh924]

Mind blowing 👌🏼👌🏼👌🏼

[@googlepluspage6780]

Nid hahrsh

[@warholcow]

This is great! Thanks!

[@lovelyroroa]

thank you ^^

[@nastaranp4687]

wow! that was great. thank u so much.

[@seguy5]

Is the UMN the same thing as CNS and LMN the same as PNS ?

[@atheerhamad1412]

no it is not. the UMN and LMN are merely tracts from CNS to the effector such as skeletal muscle but the PNS is a sepecialized system has a well defined role in rest and digestion

[@massagetherapyforinjuriesf8197]

You are the Man. Thank you

[@buumhedshot633]

fascinating. Excellent explanation. It makes it so easy to understand.

[@sunitadhiman9199]

Thanks for explaining in such a detail

[@dat4277]

Thank you for teaching me a new phrase to tell my friend "your mom is so myelin" :DD

[@dat4277]

Now I will go and tell me friend about that XD

[@9-volt247]

@@dat4277 Are you still here?

[@dat4277]

​@@9-volt247 yes?

[@LibereX646]

I liked the video just for the mamma joke , lmao

[@Jefe2024]

Thank you!

[@daydreamingstayscheming]

this fucking saved my life

[@ankitkumar-nd8bn]

hi sexy

[@Mihker]

Excellent!

[@MsCvG]

Awesome thank you.

[@kshamtaagrawal6352]

Really very very helpful sir thnxx a lott🙂🙂🙂

[@gameskyjumper1721]

TIL many ships are docking at dendrites of my motor neurons. LOL

[@bushraal2340]

Thanks a lot :)

[@vladimirisokov7455]

Anyone else watch this for fun because they refuse to teach it in high school?

[@Supermonkeyazz]

Is the lower motor neuron placed in PNS?

[@discordant8543]

Anj No, it's in the spinal cord.

[@discordant8543]

It's never an appropriate time to dougie.

[@glorygoatgaming9745]

Logged in to learn, got roasted... damn

[@ECR100]

he really said dougie loooool

[@JaneDoe-je7nh]

this is too vague :( so many missing details

[@fadinga1359]

Jane Doe that’s what an introduction is. The other videos go into detail.

[@streetInterview012]

Ronvier... lol

[@mikeross1945]

Stop with the vocal fry. I can’t pay attention

[@mjcutie8954]

not a fan of the racism khan academy...