Spinal Nerves Flashcards
CN I
Olfactory; Sensory
Smell-SVA
CN II
Optic; Sensory
Vision-SSA
CN III
Oculomotor; Motor
GVE: PNS control of ciliary, papillary sphincter Mm
GSE: motor to dorsal, ventral, medial rectus Mm, ventral oblique & levator palpebral superioris Mm
CN IV
Trochlear; Motor
GSE: motor to dorsal oblique M
CN V
Trigeminal; Mixed
V1 (ophthalmic N): GSA
V2 (maxillary N): GSA
V3 (mandibular N): SVE – motor to Mm of mastication; also sensory
CN VI
Abducens; Motor
GSE: motor to lateral rectus and retractor bulbi Mm
CN VII
Facial; Mixed
SVE: motor to superficial mm of head & face, caudal belly of digastricus M, platysma, stylohyoideus, stapedius
SVA: sensory to rostral 2/3 of tongue via chorda tympani N
GSA: sensory to concave surface of ear & ear canal via internal auricular branches (runs with CrN X)
GVE: PNS; lacrimal, nasal, palatine glands via pterygopalatine ggl, mandibular & sublingual glands via mandibular & sublingual ganglia
CN VIII
Vestibulocochlear; Sensory; SSA
Vestibular SP: balance, equilibrium
Cochlear: SP hearing
(SP=special proprioception)
CN IX
Glossopharyngeal; Mixed
SVA: sensory to taste of caudal 1/3 tongue
GVA: sensory to caudal 1/3 tongue, pharynx, palate; carotid sinus baro- and chemo- receptors
SVE: motor to striated Mm of pharynx
GVE: PNS, to parotid gland; carotid sinus baro- and chemo- receptors
CN X
Vagus; Mixed
SVE: motor to pharyngeal Mm, intrinsic Mm of larynx (recurrent laryngeal N), cricothyroideus M (cranial laryngeal N)
GVA: sensory to pharynx, larynx, thoracic & abdominal viscera
GVE: PNS to pharynx, larynx, trachea, esophagus, thoracic & abdominal viscera
CN XI
Accesory; Motor
SVE: motor to Mm of neck and forelimb Mm of brachial arch origin
CN XII
Hypoglossal; Motor
GSE: motor to Mm of tongue
True or False:
Except for GVE, all efferent classifications are motor. All afferent classifications are sensory
True
