Nerves Topo

Question 1

Innervation of Cranial Nerve II?

Answer 1

Optic nerve (II) – retina (special sensory); vision, transmission of light, pupillary reflex

Question 2

Efferent nerve of pupillary reflex?

Answer 2

Oculomotor nerve (III)

Question 3

Afferent nerve of pupillary reflex?

Answer 3

Optic nerve (II)

Question 4

Innervation of cranial nerve III?

Answer 4

Oculomotor Nerve

• dorsal, ventral, and medial rectus mm,
• ventral oblique m.
• levator palpebralis
• sphincter pupillae

Question 5

Cranial nerve IX

Motor/Sensory/Mixed?

Answer 5

Mixed nerve (glossopharyngeal n.)

Question 6

Facial (VII) nerve is for?

Answer 6

Both motor and sensory.

• Motor for facial expression mm.
• Sensory to skin, special sensory to tongue via chorda tympani

Question 7

Nerves of palpebrae?

Answer 7

• Afferent: trigeminal n. V (ophthalmic),

- Efferent: facial n. VII

Question 8

Nerves of upper palpebrae?

Answer 8

• Motor – Facial n.

- Sensory – Maxillary n. (ex. Trigeminal n.)

Question 9

Nerves of nostrils?

Answer 9

Trigeminal n. branches:

• Maxillary n. > infraorbital n. > caudal nasal n.
• Ophthalmic n. > nasociliary n.

Question 10

Sensory nerves of tongue?

Answer 10

• Glossopharyngeal (IX)
• Facial (VII)
• Mandibular – Lingual branch (V3)

Question 11

Motor of tongue?

Answer 11

Hypoglossal (XII)

Question 12

What is blocked by mandibular nerve block?

Answer 12

• Salivary glands
• mastication mm
• lower teeth
• lower lip
• tongue
• part of external ear

Question 13

Which facial muscles are innervated by trigeminal n.?

Answer 13

Muscles of mastication

Question 14

Which nerves innervate muscles of mastication?

Answer 14

• Trigeminal n. (V)
• Mandibular n. (V3)
  ….masseter, temporal, buccal nn.

Question 15

Afferent n. of eyelids?

Answer 15

Trigeminal (V) n.

Question 16

Innervation of supraorbital n.?

Answer 16

Forehead (Ca and Ru nerve is absent)

Question 17

Which nerve found in btw. The 2 heads of the flexors of ulna?

Answer 17

Ulnar n.

Question 18

Which nerve runs with the cephalic vein?

Answer 18

Superficial radial n.

Question 19

EQUINE: Innervation of the head?

Answer 19

Eyes:
- abduscent (VI) n. 
- trochlear (IV) n. 
- oculomotor (III) n, - motor nn. 
- optic (II) - special sensory n.
Muscles:
- trigeminal (V) n.  - motor to mastication muscles and sensory to skin 
- facial (VII) n. - mimic muscles
Mouth:
- vagus (X) n. 
- glossopharyngeal (IX) n. 
- hypoglossal (XII)
- C1+C2 

Or: infraorbital n., supraorbital n., infratrochlear n., mental n., facial n., auriculotemporal n. ? (don’t understand this part) ?

Question 20

RUMINANTS: Which nerve should be anaesthetized when dehorning?

Answer 20

• Cornual n. (branch of lacrimal – ophthalmic – trigeminal)

- C1 + C2 (cervical nn.) Caudal auricular n.