cranial nerves Flashcards
collections of cell bodies of nerves located outside the brain/spinal cord =
ganglia
CNI
Olfactory , SENSORY
CNII
Optic, SENSORY
CNIII
Ocuolomotor, MOTOR
CNIV (4)
Trochlear, MOTOR
CNV
Trigeminal, BOTH
CNVI (6)
Abducens, MOTOR
CNVII (7)
Facial, BOTH
CNVIII (8)
Vesibulocochlear, SENSORY
CNIX (9)
Glossopharyngeal, BOTH
CNX (10)
Vagus, BOTH
CNXI (11)
Accessory, MOTOR
what are the 3 sensory only cranial nerves
I,II,VIII (8)
what are the 4 mixed cranial nerves
V, VII, IX, X
5, 7. 9, 10
trigeminal, facial, glossopharyngeal, vagus
what are the 2 types of motor axons that innervate skeletal mm’s
branchial - innervate mm’s that develop from pharyngeal arches
somatic - innervate mm’s that develop from head somites for eye and tongue mm’s
CNXII
Hypoglossal, Motor
mnemonic for remembering sensory/motor/both in order
some may marry money but my brother says big brains matter more
sensory = unipolar
interneurons = bipolar
motor = multipolar
CN II - Optic =
Sight
each optic nerve controls half of each eye
optic nerves cross in the optic chiasma
CN XII (12) Hypoglossal =
- devoted solely to tongue
- motor
origin= medulla
ends = tongue
CN XI - Accessory =
- supplies somatic motor innervation to traps and SCM
- Motor
origin = medulla
ends - traps, SCM
CN X - Vagus
mixed
motor origin= medulla
ends = mms of pharynx, larynx, soft palate used in swallowing, vocalization, coughing, lungs, heart, GI tract glands, esophagus, stomach, gallbladder, sm intestine, most of large intestine
