X Vagus Flashcards
1
Q
origins & levels of vagus nerve
A
- dorsal motor nucleus (medulla)
- nucleus ambiguus (medulla)
- nucleus of solitary tract (medulla)
- nucleus of spinal tract of V (medulla)
2
Q
where does the vagus nerve exit the brain?
A
post-olivary sulcus
3
Q
parasympathetic functions of vagus nerve
A
parasympathetic to thorax & abdomen
dorsal motor nucleus
4
Q
motor functions of vagus nerve
A
- pharyngeal constrictors
- intrinsic laryngeal mm
- palatine mm (except tensor veli palatini)
- upper esophagus for phonation and swallowing
nucleus ambiguus
5
Q
sensory functions of vagus nerve
A
- taste from larynx & epiglottis (solitary nucleus)
- sensory to pharynx, larynx, concha of external ear, meninges of posterior fossa (nucleus of SToV)
6
Q
lesion of vagus nerve
A
- hoarseness
- dysphagia
- loss of gag reflex
- uvular deviation to strong side
