Cranial Nerve Handout Flashcards Preview

Gross Anatomy Exam 4 > Cranial Nerve Handout > Flashcards

Flashcards in Cranial Nerve Handout Deck (29):
1

What n. leaves cranial cavity via cribiform foramina?

Olfactory n.

2

What n. leaves cranial cavity via optic canal?

Optic n.

3

What nn. leave cranial cavity via orbital fissure?

1. Oculomotor n. (3)
2. Trochlear n. (4)
3. Opthalmic branch of trigeminal (V1)
4. Aducens (6)

4

Trigeminal n. passes through what in cranial cavity before trifurcating?

Trigeminal canal

5

What n. leaves cranial cavity through oval foramen?

Mandibular branch of trigeminal

6

What n. leaves cranial cavity through round foramen?

Maxillary branch

7

What nn. enter internal acoustic meatus?

Facial (7) and vestibulocochlear (8)

8

What n. leaves cranial cavity through stylomastoid foramen?

Facial

9

What nn. enter jugular foramen to exit cranial cavity via tympano-occipital fissure?

9-11 (glossopharyngeal, vagus and accessory)

10

Olfactory n. comes off of brain where?

Olfactory lobe

11

Oculomotor n. comes off of brain where?

Just cd. to pituitary (small)

12

Trocheal n. comes off of brain where?

Dorsal brainstem between cerebrum and cerebellum

13

What nn. come off at lateral edge of trapezoid bodies?

5, 7-10 (5 and 8 are big)

14

Which n. does not emerge from cranial cavity?

Vestibulochoclear n. (8)

15

Function of olfactory n.

Olfaction (SVA)

16

Function of optic n.

Vision (SSA)

17

Functions of oculomotor n.

Motor to: (GSE)
1. Ventral oblique m.
2. Dorsal, ventral, medial rectus mm. (all except lateral rectus m.)
3. Levator palpebrae superioris m.

Parasympathetic GVE to:
1. Sphincter mm. of iris
2. Ciliary m.

18

Trochlear function

Motor to dorsal oblique m. (GSE)

19

3 branches of trigeminal n.

1. Ophthalmic br.
2. Maxillary br.
3. Mandibular br.

20

Function of ophthalmic br.

GSA (sensory) to and around eye

21

Function of maxillary br.

GSA (sensory) to and around superior arcade and lip

22

Functions of mandibular br.

1. GSA to and around inferior arcade, lip and tongue
2. SVE to mm. of mastication except cd. half of digastricus m.

23

Function of abducens n.

GSE to:
1. Lateral rectus m.
2. Retractor bulbi mm.

24

Functions of facial n.

Motor (SVE) to:
1. Mm. of facial expression
2. Cd. half of digastricus m.

3. SVA taste sensation to rostral 2/3 of tongue

Parasympathetic GVE to:
4-6. Lacrimal, nasal and palatine glands
7-8. Mandibular and sublingual glands

Sensory (GVA) to:
9. Soft palate
10. Nasopharynx

25

Function of vestibulocochlear n.

Balance and audition (SSA)

26

Functions of glosopharyngeal n.

1. SVA (taste sensation) from cr. 1/3 of tongue

Parasympathetic GVE to:
2. Parotid sg.
3. Zygmoatic sg.

Sensory (GVA) to:
4. Pharynx
5. Carotid sinus

Motor (SVE) to:
6. Pharyngeal mm.

27

Function of accessory n.

SVE (motor) to:
1. Trapezius m.
2. Sternocephalicus m.
3. Brachiocephalicus m
4. Omotransversius m.

28

Function of hypoglossal n.

GSE (motor) to extrinsic and intrinsic mm. of tongue

29

Functions of vagus n.

GVE (motor) to:
1. Smooth m. and glands of resp. and digestive systems
2. Heart

GVA (sensory) to respiratory and digestive systems

SVE (motor) to:
3. Pharynx
4. Larynx

SVA (taste) to pharynx

GSA (sensory) from external auditory canal