lecture 20 - cranial nerves of the medulla Flashcards
What are the 2 roots of the accessory nerve?
Cranial root, spinal root
Which cranial nerves arise from the nucleus ambigous?
Vagus nerve, Cranial XI
Where does the spinal root of nerve XI arise?
The accessory nucleus in the spinal cord (C1-C5)
What does Cranial XI supply?
The muscles of the larynx and pharynx, alongside the vagus nerve
What does spinal XI supply?
The trapezius and sternocleidomastoid muscles
What are the important nuclei for Cranial nerves X and XI?
Nucleus of tractus solitarius, nucleus ambiguous, superior salivatory, inferior salivatory, dorsal motor nucleus of X
What are the functions of the nucleus of tractus solitaius?
T for taste, S for visceral sensation
Which cranial nerves are associated with Nucleus of tractus solitarius?
N, T, S = Nine, Ten (X + CrXI), Seven
Which cranial nerve supplies taste sensation for the anterior 2/3 of the tongue?
Facial nerve (VII)
Which cranial nerve supplies taste sensation for the posterior 1/3 of the tongue?
Glossopharyngeal nerve (IX)
Which cranial nerve supplies taste sensation for the epiglottis?
Vagus nerve (X/CrXI)
What are the general visceral sensation inputs to the nucleus of tractus solitarius from CNVII?
none
What are the general visceral sensation inputs to the nucleus of tractus solitarius from CNIX?
Carotid sinus baroreceptors, carotid body chemoreceptors
What are the general visceral sensation inputs to the nucleus of tractus solitarius from CNX and CrXI?
Aortic arch baroreceptors, aortic body chemoreceptors, lung stretch receptors, gut stretch receptors
What are the visceral motor nuclei found in the brain stem?
Dorsal Motor X, salivatory nuclei (superior & inferior), Edinger-Westphal nucleus