Hypoglossal Nerve | Course & Branches | Anatomy Tutorial
#hypoglossal #cranialnerve #anatomy
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Hypoglossal nerve is the 12th cranial nerve and purely motor.
Its fibers arise from hypoglossal nucleus located in the medulla.
The hypoglossal nerve arises on the ventral aspect of the medulla between the pyramid and the olive being related at this level with the vertebral artery which is located anterior to the nerve.
Further on The hypoglossal nerve exits the cranial cavity by way of hypoglossal canal.
At the level of angle of mandible the nerve curves forward crossing in front of the internal and external carotid arteries, and the loop of the 1st part of the lingual artery to reach the posterior margin of the hyoglossal muscle. Now it runs on the superficial surface of the hypoglossus and gives off branches to three of the four extrinsic muscles of the tongue: branch hyoglossus muscle, branch to styloglossus muscle and branch to genioglossus muscle. It also give branches to all the intrinsic muscles of the tongue.
Those were branches of the hypoglossal nerve proper.
The hypoglossal nerve carries also fibers from the C1 spinal nerve which we will indicate further using the green colour. These fibers travel along the hypoglossal nerve to supply the geniohyoid muscle and the Thyrohyoid muscle.
Some fibers from the C1 spinal nerve have a recurrent course traveling along the hypoglossal nerve to enter the cranial cavity by way of hypoglossal canal as the meningeal branch to supply the dura mater of the posterior cranial fossa.
Finally ,As the hypoglossal nerve crosses the internal carotid artery it gives off the superior root of ansa cervicalis.
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short and sweet. I am obsessed with this channel.
Breathtaking of how much easier you make it !!!💚💚🖤
Thank You. Whatever I say will not be enough. Just print your figures in a book add some explanations and print it.It will be a success. You're amazing. I passed the MRCS exams thanks to you.
@AnatomyKnowledge
3 жыл бұрын
Thank you too for your really motivating feedback! I wish you all the best!
Clear explanation n time saving vedios....appreciable...gonna share this channel as much as i can
Your explanation is exceptionally great ! Could you do same tutorials with other CN please!
I got goosebumps.. excellent!!!
Excellent stuff!💯
Thank you so so much for helping me . Can you please upload full upper limb and lower limb As soon as you can bcz in month I have exams and I can only easily prepare from your videos only Please help
Excellent demonstration brother..
Thanks man More power to your elbow
Good job... well said...with best diagram
Amazing!
Amazing thank you very much
Thank you ❤️
Thank you sir
best video
Bravo 👏 👏 👏
Thanku sir ❤️
Question help pls! On the right side of the tongue (concerning hypoglossal nerve) - what nerve fibre is within that nerve & it’s function? ❤️
Wow
👏👏👏👏👏👏
Could you please respond to my question ! Have you seen patients with stenotic hypoglossal canal where nerve number 12 has been impinged ? Or has atrophied on that hypoglossal canal ?
@zuhramuskan5563
2 жыл бұрын
basically most of the nerve injuries at the base level occur due to neoplasms and fractures but as we know boundaries of hypoglossal canal are strong so canal protect its nerve well but if stenosis occurs there just like the stenosis of foramen magnum so possibility of hypoglossal nerve palsy can increases but i never hear abt it that common but once seen in an article on google.....
Some people have congenital problems not able to use their tongue normally as a result having difficulty with speech or absent due to the the innervation problems . Surely there is a solution for it!
Vidio on vagus nerve should b💓
I want to say like that meme "I would fight for you''
Perhaps The hypoglossal canal congenitally stenotic and nerve has been damaged because of abnormal size of the hypoglossal canal could of been easily mended if it has been found on time! What is your response ? Does it make any sense? Otherwise it can grow and reach the final destination distally to innervate those special muscles : hypoglossus, genioglossus, styloglossus and intrinsic tongue muscles!!!!
Amazing thank you very much
Amazing thank you very much