#study anatomy

Hypoglossal nerve is the 12th cranial nerve, having a purely motor function of innervating intrinsic and extrinsic muscles of the tongue. Intrinsic muscles allow you to change the shape of the tongue, while extrinsic - to move the tongue within the oral cavity. It arises from the medulla oblongata in the brain stem, passing across the posterior cranial fossa, within the subarachnoid space and exiting the cranium via the hypoglossal canal of the occipital bone. Outside of the cranium, the nerve receives a branch of the cervical plexus that conducts fibres from C1/C2 spinal nerve roots, and they travel together, crossing the internal and external carotid arteries and eventually reaching the anterior part of the tongue. The C1/C2 roots serve to  innervate the geniohyoid (elevates the hyoid bone) and thyrohyoid (depresses the hyoid bone) muscles.

What if it isn’t working properly?

It’s uncommon, but if one’s hypoglossal nerve is damaged, then a person might experience hypoglossal nerve palsy, characterised by deviating, unusual tongue movements, muscle wasting and twitching of isolated groups of muscle fibres on the affected side.

Cloudy day and coffee ☕️

4/3/2020//

Anatomy all day everyday

This weeks topic has been A. Carotis communis & V. Jugularis and all their 58917 branches 😂, that continues from the neck to the head and the face. It feels like one of the easier topics but on the other hand it can be really hard as many of the vessels aren’t really visible ....this can be really interesting

I hate colouring. I hate drawing clothes.