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.
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[@Kranca2000]

I find the handwriting oddly satisfying

[@2ndchancehypnotherapy]

Same🤗

[@user-eb8xb7pp6i]

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

[@Anabela2023]

THANK GOD FOR PEOPLE LIKE YOU🙏🏾💕

[@virupannamedikinal]

Thank you so much Raja Sir

[@mariocesarbenitez5552]

Thank you so much

[@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?

[@cherylannG100]

This guy explains it so well- Thank you :)

[@nairitasengupta8321]

He made t so easy to understn

[@frankieroandMCR]

Ya mama so myelin, omg hahaha

[@backstreetfan2887]

thank you!

[@ezzieemeonye539]

amazing...

[@epicwarframepvp6389]

Nice, thx

[@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.😅

[@susymendoza5079]

WOW! Thanks a bunch for making that be more understandable

[@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...

[@flamurbedrolli802]

Too much rendundant material in Khan Academy .

[@nihalalik]

beautiful (y)

[@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?

[@shivanisharma6943]

You are awesome, sir. Hats off

[@backstreetfan2887]

had to google dougie, never heard of that

[@sayvory]

Cool, very informative and simple, thanks!

[@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!

[@peterdelbuono2936]

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

[@warholcow]

This is great! Thanks!

[@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

[@nastaranp4687]

wow! that was great. thank u so much.

[@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?

[@xiaoyanzhang1964]

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

[@LibereX646]

I liked the video just for the mamma joke , lmao

[@lovelyroroa]

thank you ^^

[@nidarshanjayaganesh924]

Mind blowing 👌🏼👌🏼👌🏼

[@googlepluspage6780]

Nid hahrsh

[@gameskyjumper1721]

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

[@buumhedshot633]

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

[@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

[@tedstehr8194]

Very useful to understand my spasticity. Thank you Raja.

[@dream-zf1th]

this fucking saved my life

[@ankitkumar-nd8bn]

hi sexy

[@vladimirisokov7455]

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

[@glorygoatgaming9745]

Logged in to learn, got roasted... damn

[@Supermonkeyazz]

Is the lower motor neuron placed in PNS?

[@discordant8543]

Anj No, it's in the spinal cord.

[@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...

[@Mihker]

Excellent!

[@MsCvG]

Awesome thank you.

[@bushraal2340]

Thanks a lot :)

[@kshamtaagrawal6352]

Really very very helpful sir thnxx a lott🙂🙂🙂

[@discordant8543]

It's never an appropriate time to dougie.

[@ECR100ECR]

he really said dougie loooool

[@sunitadhiman9199]

Thanks for explaining in such a detail

[@Jefe2024]

Thank you!

[@massagetherapyforinjuriesf8197]

You are the Man. Thank you

[@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...