The orbit and the eye

Question 1

What are the 3 main branches of V1?

Answer 1

Lacrimal nerve, frontal nerve and nasocillary nerve

Question 2

The ciliary ganglion provides postganglionic axons to which gland?

Answer 2

Lacrimal gland

Question 3

What does the frontal nerve branch into?

Answer 3

Supraorbital and supratrochlear

Question 4

What are the branches of nasocillary nerve?

Answer 4

Anterior and posterior ethmoidal nerves
Long ciliary nerve
Ganglionic branches

Question 5

Through what muscle does frontal nerve run?

Answer 5

Levator palpebrae superioris

Question 6

Through what muscle does nasocillary nerve run through?

Answer 6

Superior oblique

Question 7

What do the anterior and posterior ethmoidal nerve innervate?

Answer 7

Sensory innervation to lateral wall of nose

Question 8

What does the long ciliary nerve innervate?

Answer 8

Supplies sympathetic fibres to the eyeball

Question 9

What does the ganglionic branches give off?

Answer 9

Short ciliary branches

Question 10

What is the parasympathetic ganglion of the eye?

Answer 10

Cilary ganglion

Question 11

What provides the pre-ganglionic parasympathetic motor root of the ciliary ganglion?

Answer 11

Oculomotor nere

Question 12

What is the parasympathetic fibres of the occulosmotr nerve motor to?

Answer 12

Sphincter papillae and ciliary muscles

Question 13

What is the sympathetic root to the ciliary ganglion?

Answer 13

Sympathetic plexus around ophthalmic artery

Question 14

What is the sympathetic root of ciliary ganglion motor to?

Answer 14

BV of the eye

Question 15

What is the sensory root of cilary ganglion?

Answer 15

From nasocillary nerve

Question 16

What is the sensory root of ciliary ganglion sensory to?

Answer 16

Cornea and iris

Question 17

What does the lacrimal gland secrete?

Answer 17

Tears

Question 18

What happens to the tears secreted by lacrimal gland?

Answer 18

Wash medially across the eye, drain into lacrimal sac and into nasolacrimal duct then into inferior meatus

Question 19

What provides the parasympathetic motor supply to the lacrimal gland?

Answer 19

Via the pterygopalatine ganglion
Preganglionic = greater petrosal nerve (VII)
Postganglionic = zygomatic nerve

Question 20

Where do the sympathetic fibres that innervate the pterygopalatine ganglion originate?

Answer 20

Superior cervical ganglion and deep petrosal nerve

Question 21

What provides sensory innervation to pterygopalatine ganglion?

Answer 21

V2