Cranial Nuclei 2 Flashcards
Which cranial nuclei does CN III synapse in?
Edinga-Westphall (visceral motor) in rostral midbrain - ANS supply of eye (ciliary and pupillary muscles)
Oculomotor (somatic motor) in rostral midbrain - voluntary movements of oculomotor muscles (except lateral recti & superior oblique)
Which nuclei does CN IV synapse in?
Trochlear (somatic motor) in caudal midbrain
Which nuclei does VI synapse in?
Abducens (somatic motor) in caudal pons
Which nuclei does VII synapse in?
Somatic sensory / trigeminal nucleus (somatic sensory) - in all brainstem
Solitary (visceral sensory) - in medulla and caudal pons
Superior and inferior salvitory (visceral motor) - in caudal pons and rostral medulla
Facial motor (brachial motor) in caudal pons
Which nuclei does VIII synapse in?
cochlear (special sensory) in rostral pons
vestibular (special sensory) in caudal pons
which nuclei does IX synapse in?
somatic sensory / trigeminal (somatic sensory) in all brainstem
solitary (visceral sensory) in medulla and rostral pons
ambiguus (brachial motor) in rostral medulla
inferior salvitory (visceral motor) in rostral medulla
which nuclei does X synapse in?
somatic sensory / trigeminal (somatic sensory) in all brainstem
solitary (visceral sensory) in medulla and caudal pons
dorsal motor nucleus of vagus (visceral motor) in caudal medulla
ambiguus (brachial motor) in rostral medulla
which nuclei does XI synapse in?
Ambiguus (brachial motor) in rostral medulla
which nuclei does XII synapse in?
hypoglossal (somatic motor) in rostral medulla
describe the somatic sensory nucleus
also known as the trigeminal system.
somatic sensory fibre types.
covers entire brainstem
4 nerves: CV trigeminal CVII facial CIX glossopharyngeal CX vagus
3 subnuclei:
- mesencephalic
- chief sensory
- spinal trigeminal
describe the solitary nucleus
visceral sensory fibre types.
in caudal pons and medulla
3 nerves:
CVII facial
CIX hypoglossal
CX vagus
describe the nucleus ambiguus
brachial motor fibre types
in rostral medulla
3 nerves:
CIX hypoglossal
CX vagus
CXI accessory
How many nuclei have multiple nerves synapsing?
4
somatic sensory / trigeminal (4 nerves): CN V - trigeminal CN VII - facial CN IX - hypoglossal CX - vagus
solitary (3 nerves):
CN VII - facial
CN IX - hypoglossal
CX - vagus
ambiguus (3 nerves)
CN IX - hypoglossal
CX - vagus
CXI - accessory
inferior salvitory (2 nerves):
CVII - facial
CIX - hypoglossal
describe the cochlear and vestibular nuclei
both synapses for CN VIII vestibulocochlear
both special sensory fibre type
cochlear - rostral pons
vestibular - caudal pons
describe the Edinga-Westphall nucleus
for CN III oculomotor
in rostral midbrain
visceral motor fibre type
ANS supply to ciliary & pupillary mm of eye
