Cervical Plexus and Nerves Flashcards
superficial branches of cervical plexus
nerves C2-4
sensory fibers to the skin of posterolateral aspect of head and neck, ant. neck, and upper chest and shoulders
lesser occipital n
C2-3
great auricular n
C2-3
transverse cervical n
C2-3
supraclavicualr n
C3-4
ansa cervicalis
ant. rami of C1-3
superior root (C1-2) - hypoglossal n.
inferior root (C2-3)
inn all of the infrahoid m.
phrenic n.
C3-5
descends superficial to the ant. scalene mm
brachial plexus
C5-T1
compressed by ant. scalene mm
general somatic afferent (GSA)
inn ectodermal origin
convey pain, temp, tactile, pressure, and proprioception
sharp local pain
general visceral afferent (GVA)
inn endodermal origin
fibers convey visceral pain (stretch, ischemia) and reflexes
dull ache, throbbing, non local pain
general somatic efferent (GSE)
inn mm of myotomic origin (tongue and extra ocular mm)
general visceral efferent (GVE)
associated with the sympathetic (thoraco-lumbar) and parasympathetic (carino-sacral) divisions of the ANS
NO PREganglionic parasympathetic fibers in any spinal n
trigeminal sensory nuclei (GSA)
sensory nucleus for all sensations
all GSA fibers from cranial n V, VII, IX, and X
includes 3 nuclei: mesencephalic nucleus of V, main sensory nucleus of V, and descending nucleus of V
solitary nucleus (SVA and GVA)
sensory nucleus for general sensation from the posterior 1/3 of the tongue to the mid portion of the transverse colon
all GVA and SVA (tase) fibers
oculomotor nucleus
inn superior, inferior, and medial recti, inferior oblique, and the levator palperbae superioris mm via branches of the oculomotor n
trochlear nucleus (IV)
inn the superior oblique mm
abducens nucleus (VI)
inn the lateral rectus mm
hypoglossal nucleus (XII)
inn all of the mm associated w/ the tongue, except palatoglosssus
edinger-westphal nucleus
PRE - oculomotor n
Ciliary ganglion
POST - ciliary m of the lens and the pupillary constrictor m
superior salivatory nucleus (VII)
PRE - 2 ganglion
Sphenoplalatine ganglion - lacrimal gland and oral and nasal cavities
submandibular ganglion - submandibular and sublingual salivary glands
inferior salivatory nucleus (IX)
otic ganglion - parotid salivary gland
dorsal motor nucleus (X)
PRE - ganglia in larynx, pharynx, thorax, and abdomen
POST - various glands and smooth m in region
SVE column
inn mm derived from mesencyme of brachial arches
glossopharyngeal n (IX) lesion
loss og gag reflex
slight dysphagia
loss of sensation in pharynx and posterior 1/3 of tongue
vagus n (X) lesion
dysphonia
dysphagia
dyspnea
loss of gag or laryngeal couch reflex
accessory nerves
unilateral lesions of the spinal accessory n result in an ipsilateral inability to shrug the shoulder and flex and rotate the head
hypoglossal n lesion
deviation of the protruded tongue towards the affected side
mesencephalic nucleus of V
proprioception information from the facial m
main sensory nucleus of V
precise tactile discrimination of information from the face
descending nucleus of V
crude tactile pain, temp information from the face
trigeminal motor nucleus
inn mm of mastication, tensor palati, tensor tympani, mylophyoid, ant digastric
facial motor nucleus
inn mm of facial expression, stylohyoid, stapedius, and posterior digastric
nuclues ambiguus
inn sytlopharyngenus, platoglossus, and mm of the palate, larynx and pharynx
accessory nuclues
inn SCM and trap
