Hypoglossal Nerve
Introduction[edit | edit source]
it is the 12 cranial nerves that originate from the medulla obligate of the brain stem.
innervation[edit | edit source]
it gives only somatic motor innervation for all extrinsic and intrinsic muscles of the tongue except the palatoglossus, innervated by the vagus nerve.
examination[edit | edit source]
ask the patient to protrude the tongue and move it in all directions.
<ref>physiotutors.Cranial Nerve 12 | Hypoglossal Nerve Assessment for Physiotherapists.availble from :https://www.youtube.com/watch?v=e6X8vMYTSHs
lesion[edit | edit source]
1/ UMNL: unilateral: deviation of the tongue to the opposite side of the lesion. bilateral: inability to protrude the tongue. note in both cases there is no wasting or fasciculation 2/LMNL: unilateral: deviation of the tongue to the side of the lesion.
bilateral: inability to protrude the tongue.
note in both cases there is wasting and fasciculation.
