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Flashcards in 28-CranialNerves Deck (43)
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1

G__

general - distributed through the whole body

2

S__

special - restricted area of the body (eg taste buds)

3

_V_

visceral - visceral, taste, smell

4

_S_

somatic - supplying structures in body wall, eg skin, muscle, joints

5

__A

afferent

6

__E

efferent

7

GSA

general somatic afferent - pain, touch, temperature

8

SVA

special visceral afferent - smell, taste

9

GVA

general visceral afferent - mechanoreceptors, nociceptors *in viscera*

10

GSA cranial nerves (x4)

V (trigeminal), VII (vestibolocochlear), IX (glossopharyngeal), X (vagus)

11

SVA cranial nerves (x4)

I (olfactory), VII (facial), IX (glossopharyngeal), X (vagus)

12

GVA cranial nerves (x3)

VII (facial), IX (glossopharyngeal), X (vagus)

13

GVE

general visceral efferent - autonomic, parasympathetic

14

GVE cranial nerves (x4)

III (oculomotor), VII (facial), IX (glossopharyngeal), X (vagus)

15

GSE

general somatic efferent - motor neurons

16

GSE cranial nerves (x4)

III (oculomotor), IV (trochlear), VI (abducens) -- eye movement
XII (hypoglossal) -- tongue

17

SVE

special visceral efferent - also motor neurons, but embryologically different (functionally identical to GSE)

18

SVE - cranial nerves (x5)

V (trigeminal), VII (facial), IX (glossopharyngeal), X (vagus), XI (accessory)

19

Olfactory nerve - nerve classification

SVA

20

Optic nerve - nerve classification

SSA

21

Oculomotor nerve - nerve classifications (x2)

- GSE: eye movement (adduction, elevation, depression, rotation), lifting eyelid
- GVE: ciliary muscle (near vision) and pupillary sphincter (constrict pupil)

22

Disorders:
Eye deviated down and out

Problem with CN III (oculomotor)
- down = unopposed action of superior oblique from CN IV
- out = unopposed action of latractus from CN VI

23

Disorders:
dilated pupil

Problem with CN III
due to unopposed action of sympathetic

24

Disorders:
Diplopia (double vision)

Problem with CN III

25

Trochlear nerve - nerve classification

GSE

26

Disorders:
Symptoms of damage to CN IV

- can't look down while looking nasally
- head tilted, chin tucked toward contralateral side (to compensate for torsion on eye from lack of sup. oblique)

27

Trigeminal nerve - nerve classifications (x2)

- GSA: pain, temp, touch on face, in nasal and oral cavities, teeth, gums, cornea, and anterior 2/3 of tongue, and closing eyelid
- SVE - muscles of mastication and tensor tympani

28

Disorders:
Symptoms of damage to CN V (x4)

- weakness (in muscles of mastication)
- anesthesia (no sensation on face, etc.)
- loud noise (unable to dampen loud sounds)
- blink reflex decreased or abolished

29

Abducens nerve - nerve classification

GSE (lateral rectus muscle)

30

Disorders:
Symptoms of damage to CN VI
Eye is deviated ___

medially