Neuroanatomy lecture 6: Cranial nerves continued Flashcards
GSE (general somatic efferent):
motor fibers to skeletal muscle (voluntary)
GSA (general somatic afferent):
fibers that carry general sensation (touch, pressure, pain, proprioception, temp, tickle and vibration)
GVE (General visceral efferent):
motor fibers to smooth muscle, glands, and viscera (involuntary)
GVA (general visceral afferent):
fibers that carry visceral sensation
BE/SVE (brachial efferent/special visceral efferent):
motor fibers to skeletal, voluntary muscles that developed from brachial (pharyngeal) arches
SVA (special visceral afferent):
taste & smell
SSA (special somatic afferent):
vision, hearing, & balance
parasympathetic GVE fibers reside only in:
CN III: oculomotor
-ciliary ganglion
CN VII: facial
-pterygopalatine & submandibular ganglion
CN IX: glossopharyngeal
-otic ganglion
CN X: vagus
-various ganglia near visceral organs
Branchial motor (BE/SVE) fibers reside only in nerves associated with ___________ ___________ arches.
pharyngeal (branchial)
CN V: trigeminal nerve:
major sensory pathway for the face
pathway:
-begins at pons and travels superiorly/anteriorly towards face
-splits into three terminal divisions as trigeminal ganglion in middle cranial fossa
V1 = Opthalmic
V2 = maxillary
V3 = Mandibular
Each terminal branch exits the skull via a different foramen and innervates a different region of the face.
Trigeminal ganglion:
V1 =>
Opthalmic
GSA modality
-upper face
V2 =>
Maxillary
GSA Modality
-Mid face
V3 =>
Mandibular
GSA modality
-Lower face
BE/SVE modality
-Arch 1
-Muscles of mastication
Spinal nucleus of the trigeminal nerve:
pain, temp & light touch
Chief or principle nucleus or main sensory nucleus:
discriminative sensation and light touch as well as conscious proprioception
Mesencephalic nucleus:
proprioception