formative Flashcards
describe the pupillary light reflex
- light detected by photoreceptors in retina
- optic nerve
- pre tectal nucleus in midbrain
- edinger westphal nucleus in brainstem
- parasympathetic fibres carried on oculomotor nerve
- sphincter pupillae muscle of iris
afferent and efferent limb of pupillary light reflex
target tissue
afferent: optic nerve
efferent: oculomotor nerve
target tissue- pupillae muscle of iris
from which artery do the branches of the optic disc arise?
central retinal artery
function of macula
provide highest acuity vision
its the point of retina for central vision
two folds/ arches in the mouth
palatoglossal
palatopharyngeal (further back)
which CN innervates uvula?
VAGUS
uvula deviates towards which side when CN is affected
towards unaffected side during phonation
afferent limb and efferent limb of gag reflex
The afferent limb= glossopharyngeal (IX) nerve,
efferent limb= vagus (X) nerve
what happens to soft palate during swallowing
it elevates to close off nasopharynx from oropharynx
what happens to the epiglottis during swallowing
covers laryngeal inlet
what happens to the true vocal cords during swallowing
adduct
terminal branches of facial nerve
greater petrosal (lacrimal gland) nerve to stapedius (auditory) chordates tympani (taste)
