A&P - CRANIAL NERVES - A&P 2 Flashcards
Cranial nerve I
Olfactory
Sensory
Smell
Cranial nerve II
Optic
Sensory
Vision
Cranial nerve III
Oculomotor
Mostly motor
Eye movement
Cranial nerve IV
Troclear
Mostly motor
Eye movement
Cranial nerve V
Trigeminal
Class: mixed
Function: sensation of head and face; chewing proprioception
Cranial nerve VI
Abducens
Mostly motor
Eye movement
(Abduction of eye)
Cranial nerve VII
Fascial
Both
Facial expressions, secretes tears and saliva
Cranial nerve VIII
Vestibulocochlear
Sensory
Hearing, equilibrium, balance
Cranial nerve IX
Glossophayngeal
Mixed
Function: SENSORY:somatic taste, posterior tongue sensations (touch, pain, temp), proprioception in swallow muscles, visceral- monitor Hb pressure, O2/CO2 in Hb for regulating breathing rate and depth
MOTOR: somatic muscle function of swallowing and speech, ANS stimulates saliva secretion
Cranial nerve X
Vagus “wandering”
Mixed
Sensation - sensation of movement of pharynx, larynx, thoracic and abdominal viscera via stretch receptors (taste and touch, pain, temp) parasympathetic fibers chemoreceptors to all organs except adrenal glands (BP, o2/co2 for breathing)
Motor- skeletal muscle throat and neck (swallow, cough, voice); parasympathetic to smooth muscle (GI tract contraction/relaxion, slow heart, secrete digestive fluids ) rest and digest
Cranial nerve XI
Accessory
Mostly motor
2 divisions: the cranial division joins the vagus nerve and does same function as other vegas nerve fibers; accessory division is motor innervation to SCM and traps ( movement of head and shoulders)
Cranial nerve XII
Hypoglossal nerve
Mostly motor
Function: SENSORY- sensory proprioception from the tongue ,
MOTOR - movement of tongue during speech and swallowing
