Neuroanatomy 4 Flashcards
all cranial nerves exit ___ except…
anteriorly
IV = posteriorly
VIII = laterally
all motor neurons arise from…
a motor nucleus in the brainstem
every single sensory neuron will arise outside of the CNS T or F
T, they will arise from ganglia
what sensory cranial nerve does NOT synapse in the thalamus prior to reaching the cortex
olfactory nerve
axons of the olfactory nerve extend through the ___ __ to reach the ___ ____
cribriform plate
olfactory bulb
what lobe(s) is the primary olfactory complex located in?
frontal lobe with a small extension into temporal lobe
what cranial nerves’ nuclei are found near the midline of the brainstem?
CN III, IV, VI, XII (motor)
what does the edinger westphal nucleus control?
ciliary ganglion
what nerves emerge from the brainstem close to the midline and why?
III, IV, VI, XII because their nuclei originate there
where does CNXI arise from?
cervical spinal cord
the spinal accessory nerve enters via which foramen and exists via…
foramen magnum
jugular foramen
CNV provides motor control to… (5)
muscles of mastication tensor tympani mylohyoid ant belly of digastric tensor veli palatini
how long are the trigeminal nerve’s sensory nuclei?
extend from midbrain down to C2
mesencephalon is another word for..
midbrain
name the trigeminal nerve’s 3 sensory nuclei from proximal to distal and their function
mesencephalic for proprioception
pontine/principal nucleus for touch
spinal nucleus for pain and temp sensation
what nucleus is in charge of the motor function of the muscles of mastication?
motor nucleus in the pons
facial nerve motor functions
stapedius
muscles of facial expression
facial nerve parasymp functions
pterygopalatine
submandibular ganglia
sensory function of facial nerve
taste to front 2/3 of tongue
sensory function of CNIX
pain/temp from posterior tongue, upper pharynx and eustachian tube
taste to post 1/3 tongue
parasympathetic functions of CNIX
parotid gland
nerve supply to stylopharyngeus
CNIX
facial nerve uses _ motor nuclei, name them
4 salivatory nucleus facial motor nucleus solitary nucleus for taste spinal trigeminal nucleus
glossopharyngeal uses _ motor nuclei, name them
4 solitary nucleus spinal trigeminal nucleus nucleus ambiguus inferior salivatory nerve
what does the solitary nucleus manage?
taste
what does the spinal trigeminal nucleus manage?
somatosensation of the ear
vagus nerve uses _ motor nuclei, name them
4: dorsal nucleus solitary nucleus spinal trigeminal nucleus nucleus ambiguus
function of the dorsal nucleus?
motor parasympathetic innervation
the solitary nucleus is used by what cranial nerves?
VII
IX
X
salivatory nuclei are used by what cranial nerves?
VII
IX
what does the nucleus ambiguus do?
contains motor efferents to muscles of pharynx, larynx and upper oesophagus
what cranial nerves use the nucleus ambiguus?
CN IX
CN X
where is the nucleus ambiguus located?
lower pons and upper medulla
where is the solitary nucleus located?
medulla
name the part of the corticospinal tract that is motor to cranial nerves
corticobulbar tract
what controls the parasympathetic input to cranial nerves
hypothalamus