CNXI and XII Pathways Flashcards
1
Q
Spinal accessory origin
A
confluence of C1-C5
2
Q
CNXI exit through skull
A
jugular foramen
3
Q
CNXI innervation
A
trapezius and sternocleidomastoid
4
Q
Where does CNXI originate in the cervical cord section?
A
posteriolateral portion of the anterior gray horn
5
Q
Sternocleidomastoid action
A
tilt head to contralateral side
6
Q
Damage of spinal accessory nerve problem
A
weakness turning head opposite direction
7
Q
Corticospinal
A
cortex –> spinal accessory nucleus
8
Q
SCM and trapezius upper motor neuron innervation
A
bilateral
SCM: mostly ipsilateral
trapezius: mostly contralateral
9
Q
Hypoglossal lower motor neuron damage sign
A
points to problem
10
Q
Hypoglossal upper motor neuron innervation
A
mostly contralateral
11
Q
Lower facial upper motor neuron innervation
A
completely contralateral
