vestibulocochlear pathway

Pathway of hearing
- Sound waves travel through the external auditory canal, causing vibration in the tympanic membrane, then the bony ossicles in middle ear untill they stimulate the receptors in inner ear.
- Sensation carried by cochlear nerve (CN VIII) to cochlear nuclei located at the junction between medulla and pons.
- cochlear nuclei project to superior olivary nucleus in both sides and from there to inferior colliculus in midbrain.
- Inferior colliculus projects to medial geniculate body in thalamus and from there to superior temporal gyrus where auditory and auditory assicated area are located.
- Injury of hearing pathway from any part of the ear until the cochlear nuclei causes ipsilateral deafness
- Injury of the pathway from the superior olivary nucleus until the temporal lobe causes bilateral decrease in hearing.
Vestibular pathway
- Vestibular nuclei project to different parts of CNS to ensure coordination of body moevement and balance. This includes:
1- Cerebrum (Temporal lobe)
2. Cerebellum (Floccuolnodular lobe)
3. Cranial nerve nuclei of nerves that supply extraocular muscles (occulomotor, trochlear and abducens or CN III, IV and VI).
4. Spinal cord to coordinate the movement of muscles of trunk, neck and extremities.

[@tariqabdo540]

Sound is not clear . Unfortunatly.

[@msbewhatever]

if possible , can you please go back to the way you taught anatomy before? it was so much better and no vacuum/ harsh keyboard sounds. I am really sorry if my comment sounds harsh or rude, that is not my intention. you are a great anatomy teacher and we just want to hear you !

[@EasyAnatomy]

msbewhatever Not at all, actually I am happy to hear your honest feedback and I totally agree with you. I had to do that because it was easier on me to produce more videos. However I promise you going back to the old way. Thank you very much for your thoughtful feedback!