Spinal Nerves Flashcards Preview

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Flashcards in Spinal Nerves Deck (13):
1

CN I

Olfactory; Sensory

Smell-SVA  

2

CN II

Optic; Sensory

Vision-SSA

 

3

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

4

CN IV

Trochlear; Motor

GSE: motor to dorsal oblique M

5

CN V

Trigeminal; Mixed

V1 (ophthalmic N): GSA
V2 (maxillary N): GSA
V3 (mandibular N): SVE – motor to Mm of mastication; also sensory

 

6

CN VI

Abducens; Motor

GSE: motor to lateral rectus and retractor bulbi Mm

7

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

8

CN VIII

Vestibulocochlear; Sensory; SSA

Vestibular SP: balance, equilibrium
Cochlear: SP  hearing

(SP=special proprioception)

9

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

10

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

11

CN XI

Accesory; Motor

SVE: motor to Mm of neck and forelimb Mm of brachial arch origin

12

CN XII

Hypoglossal; Motor

GSE: motor to Mm of tongue

13

True or False:

Except for GVE, all efferent classifications are motor.  All afferent classifications are sensory

True