Neurology | Hypoglossal Nerve: Cranial Nerve XII
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- Опубликовано: 16 июл 2024
- Official Ninja Nerd Website: ninjanerd.org
Ninja Nerds!
In this lecture Professor Zach Murphy will be teaching you about the hypoglossal nerve (cranial nerve XII). We will be discussing this nerves origin, course, and the structures supplied by the hypoglossal nerve. We also discuss clinical correlations including hypoglossal nerve palsy and the effect it has on the body. We hope you enjoy this lecture and be sure to support us below!
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Dare I say a future Dr. Najeeb? Great video!
+Alexander Top Marchant LOL!! That guy is a legend I don't think I could ever accomplish what he has. He is the man!! Thank you though for your super kind comments they mean so much!
Me too felt the same..
I thought exactly the same !!
OMG, Zach is sooooo much better than Dr. Najeeb -_-
Both r wonderful in their own way.I think u should reconsider ur thoughts abt Dr.Najeeb's lectures ,they r boon to all med students I know that the lectues r lenthy but it is worth it .U can also watch videos at 1.5x/2x playback speed.I'm pretty sure u will find them handy just give it a try.
Minor correction: important to my professors for deviation direction, genioglossus has contralateral supranuclear innervation. 20:00
Grateful to you want to give back, no hate just love, congrats on your mill broman.
Normal people: full stop
Zachy: sweet deal!
Now it's a sweet deal for me too!😍
Just a small correction to a perfect video, the posterior belly of the digastric muscle does not actually attach to the styloid process, but to the mastoid process in a particular depression called digastric fossa!
You and Dr.Najeeb you guys are too good. Thank you so much for giving me such a clear concept in Neuro.
Such a gifted educator, you have no idea how much your videos helped me through neuroanatomy. My professors suck and I had to stop relying on them, so I had to find another source to help my self learn and you were like a god-sent blessing. Thank you so much.
ur the best thing that happened to medicine , ur better that anyone i watched/listened to before , actually there is no comparison , man u r the best.
Thank you a thousand times for covering the topic of cranial nerves, it was really really helpful!
You're phenomenal. i love watching your videos. thank you so much for each and every video that you've uploaded.
Everything is crystal clear , thank you very much
I absolutely love this video. Can't wait to watch more of your content. It's great help for exams and much more entertaining thus allowing quicker learning. The way you repeat some of the information a few times and connect it to previous videos also makes it easier for overall learning.
What a wonderful video! I have been trying to understand this for so long.I really appreciate
This video is nothing less than AMAZING! If only doctors would explain this as you have, even half of what you shared would be so great but they don't at all. Thank you with all of my heart for taking the time to be so very thorough and exact!! I have learned so much from you on this one video that I must go and watch all of your videos, thank you again, you are a wonderful person!!
thank you so much, keep going man,
too few men could give the knowledge today, y re one of them,
Explained very well. Patiently and every times a re-cap is done before he continues. So there is reinforcement .
I really appreciate these videos! Online classes suck and I have to re-learn everything by myself.
Much appreciated! :D the board schemes with the explanations works well finally understand it
Amazing videos and amazing channel! Articulation and Phonation are two different aspects of speech! Phonation is specific to voicing while articulation refers to the manipulation of the airflow/voice to create specific sounds.
Love all of your videos! You are a great teacher.
wow clinical correlations are amazing and very important .
Awesome work done Sir ... Thank you, helped alot.. actly helped the most
Great Video! So clear and great illustrations. Thank you.
Soo Unbelievably good teacher he is.
Binge watched all the cranial nerve videos today - absolute legendary channel and honestly explains concepts in such a clear and interesting way!!!
Same here but after a year later 🥰
@@richa4279 wame here a year later to you lol
Thanks loads Ninja nerd!!!!!!!Ur effort is really appreciated...
wow, you are amazing...I really enjoy your lessons. they are super clear and interesting.
Long Live Ninja Nerd Lectures! Thank You Zach! Shout Out Rob and Kristen!
Thanks a lot! You, good sir, are doing a fantastic job!
I love ur videos. I always watch your videos when I don't understand a topic
Ninja Nerd deserves respect without any doubt🙌🙌🙌💕❤
I really appreciate ur Effort
learned a lot from you
thank u so much sir... love and respect from PAKISTAN
Love your videos ...you teach in an amazing way...
As always, great explanation
great videos! 👍🏻👍🏻 helped me a lot! keep up the great work!! sir!
I love all your video
Really help full
Upper motor neurones of hypoglossal nerve is contralateral ,not bilateral
Thanks a lot for all the Cranial nerves 🤝🏻✨,
I salute your work.
Thanks so so much doctor 🖤
Great as always
You are really good man..I learned like a easy ninja technique from your videos . Really helping me in becoming a good NINJA 😃 (DOCTOR)
I think Genioglossus is contralaterally innervated
If so, then would the UMNL cause the tongue to deviate C/L and LMNL be deviated I/L?
Because this is what was taught to me. I really need clarifications!
Hypoglossal
• Innervates muscles of the tongue • Dysarthria (V, VII, X, XII)
• Palatoglossus: Elevation (IX, X)
• Genioglossus: Protrusion
• Hyoglossus: Depression
• Styloglossus: Curl
o UMNL: C/L Tongue Deviation
o LMNL: I/L Tongue Deviation
o Deviates towards the weak side (strong side pushes the weak side)
Neucleus of the nerve to the Genioglossus get influenced by the contralateral cerebral hemisphere. That's what it says in Snell's Clinical Neuroanatomy.
It says 'cells responsible for supplying the genioglossus muscle only recieve corticonuclear fibers from the opposite cerebral hemisphere' - Snell's clinical Neuroanatomy.
And that means, unlike other muscles' fibers that have bilateral supply, genioglossus has pure contralateral.
@@ericmagpantay7693 you are right but need to restructure the description
Tongue deviates towards the weaker side --> (stronger side pushes towards weaker side)
o UMN lesion : Tongue deviate
contralateral to lesion
o LMN lesion : Tongue deviate
ipsilateral to lesion
Thank You Ninja Nerd Science
Mind blowing explanation…
Thank you for another very good Lection !!
Dear Zach you are the future of medicine mate!
u r perfect sir......
Keep going Sir.. your videos are amazing.. we Indian mbbs students owe you a lot
best teacher ever
I'm not a doctor, (but I played one in a treehouse once!) but rather a patient. I just had a hyperglossal nerve stimulator implanted as a treatment for Obstructive Sleep Apnea, and I thought I would do a bit of research into all of this. I have some knowledge of anatomical orientation and directions as well as some fairly good understanding of the human anatomy, so some of the terminology wasn't lost on me, but I am still just a layperson. I must say this was fascinating, and this 'Zach' is (where is your name printed?) just the bomb! I've already gone over to watch the video on the Valgus Nerve just for fun! You should go on tour with this with live performances! Maybe add some pyrotechnics? Cheers!
Thanks ☺ great explaining 👍👍
You are welcome!
brilliant video!
It's interesting n fun to learn from you sir ❤️✨
Next week I have a presentation about nerve 12 in English, but my native language is Arabic, but it's okay. I understood some of the information. Thank you. I hope to do this job well with the help of your explanation of the topic.
very good thank you
Thank you! 🙏
You are the best,thank you 😊😊😊😊😊😊
Thank you very much!!!!!
Thank you ❤
Genioglossus supply is primarily crossed but others bilateral but predominantly crossed ( DeJong)
great job
Thank you so much
you are the king!!!
Superb👍👍👍
YOU ARE AMAZING
Well, criminy, my doctor wants me to get an Inspire hypoglossal nerve stimulation device implanted to treat my sleep apnea and in researching just what the heck the thing is I ran across your video. Blew me away. You explained what nerve the device will stimulate and what it will do to my tongue to open up my airway and, incidentally, my daughter's apraxia. Muchos thankos!
LOVE your videos, but I have to say that my book says that the corticonuclear fibers that reach the hypoglossal nucleus are all controlateral, though there are some subnuclei reached by contralateral and homolateral fibers (it doesn't specify which subnucleus :\)
Amazing🖤
You are the best🥺🥺🥺💕💕💕💕
Ninja Nerd, i am not sure if you have been granted your MD yet, but we highly appreciate you teaching us our curriculum. my school recommended that we view your covid video when you made it. so even amidst the pandemic they thought you were a credible resource. here i am hoping for a better explanation why the tongue deviates to the weak side when muscles pull and do not push. thinking it must be pulling from the back of the tongue towards the front of the mandible; twisting the tip of the tongue towards the weak side... if this is not addressed in the video, could you please explain it. thanks again :)
@9:46 onward, the digastric is shown to attach to styloid process. I think digastric has attachment to mastoid process rather than styloid.
Thanku very much
Thank you ))
Very nice vedio I get great benefit
thank you very good!
+Amey Sharma Thank you!!!
Watched all cranial nerves videos. 😚
thanks alot buddy
awesome
Thank u thank u thank u thank u thank u much and much 💓
You are good❤
it receives input from both sides, so there is no problem with one side corticobulbar involvement
what about the Lesser’s and Pirogov’s triangle is it a normal variation when hypoglossal nerve pass above the anterior and posterior belly of digastric muscle and make a triangle with them
life saver
aren´t fasciculations a sign of lesions of the lmn which ist peripheral? but apart from that thx so much for your excellent work!!!
I love your videos, I think they'll be the reason I pass my head & neck exam coming up lol, but I believe the upper motor neuron of the hypoglossal nerve is contralateral only and the lower motor neuron is ipsilateral
Hope you passed the exam with great grades!
My books says the same about the thing with contralateral fibers (I'm using Anastasi)
Magda Brej are you doing specialisation in Head & Neck or its in your MBBS course(undergraduate)
This is incredible. Your videos are clear and succinct, and a lot of my concepts are clearer now. Thanks for sharing and helping me study :)
Yes megja
I binged all the cranial nerves today in preparation for finals. I think I need to lay down for a bit.
Done with the cranial nerves, ans here i come :)
it passes through mylohyoid, just peirces geniohyoid-a small corection be considered
trademark line : "... it goes out of a hole... in the shkull " - sounds like something an old professor would say every class
20:10 Nucleus for genioglossus mainly has contralateral corticonuclear fibres according to texts but you said the opposite. Which one is correct?
I also realised that. I think, in the video, he mistakenly said it had mainly recieved ipsilateral fibers. It's not correct. In fact, It recieves mainly contralateral fibers. That contralateral supply to the genioglossus from supranuclear fibers causes the deviation of the tongue to the healty(unaffected) side in case of supranuclear lesion.
Thanks man
May be ,,,,after Dr Najeeb 🔥💝💝🌷🌷🌹🌹❤️❤️💝❤️
hello I think there is some problem (when the damage be on the cortex level on one side the other side will Compensates . however, the big problem when the damage is bilateral .))Unilateral lesions are not typically a serious problem for patients as any impediments are compensated partly by the remaining hypoglossal nerve. However, bilateral lesions can cause profound difficulty with speech and swallowing as the patient cannot protrude the tongue for these necessary functions.((
geniogloso es contralateral, major clinical importance
uh excuse me ninja nerd at 3:22 from there you state that its the medial lemniscus, while the cuneatus and gracilis nucleus are still present there ?
dont they form the internal arcuate fibres and then create the medial lemniscus ? if the medial lemniscus is made ,then shouldnt the gracilis and cuneatus nucleus's be below that section you made
featuring the medial lemniscus ?
What an amazing explanation!
Nevertheless, I'd Just like to say that "faSCiculation" is spelled with SC.
Why is hypoglossal nuclei higher than the vagus nuclei...?
I mean trend is actually that the 1st ones are above than coming down .
Hey zach, when u said tongue deviation like the muscles of the controlateral side to the lesion will overpower the weak side of the lesion then u said the tongue will deviate to the lesion side.....when we say overpower it actually deviate to the healthy side not the lesion side......so actually we shouldn't say overpower.......idk it just seems incorrect in that situation.....like maybe if we said the muscles of the lesion side will atrophies and as a result ,they pulls the tongue to their side ,like we said for ex in the palsy of the VI the eye will be pulled by the muscles of the III(medial rectus) creating convergent strabisme
but i think the hypoglossal nucleus only recive contalateral corticobulbar fibers.
Really videos are very helpful crystal clear concepts but I would like to make a request I need some more accent to be clear,,,, I have to understand it a very deeper level by pausing the video again and again,,,, I hope you got it but rest all videos and material are too helpful Thanks a Lot Kudos to you................
❤️❤️❤️