1. The following statements are true about the  inferior oblique 

    muscle EXCEPT:

a. it is inserted about 17mm behind the limbus

b. it arises from the posterior lacrimal crest of the infero-nasal

    orbital rim margin.

c. its posterior edge inserts behind the fovea

d. it contains no tendon

e. its primary action is extortion

AnswerAnswer: c

The posterior edge is normally inserted 1 mm 

anterior and below the fovea .

..

2. The ciliary ganglion:

a. is about 5 mm in diameter

b. lies medial to the optic nerve

c. contains preganglionic axons from the Edinger-Westphal nucleus 

    that form synapses within it

d. contains parasympathetic nerve fibres that innervate the dilator 

    pupillae

e. if damaged, produces a pupil that does not react to light but

   responds to accommodation normally.

AnswerAnswer: c

The ciliary ganglion is about 1-2mm in diameter. 

It lies lateral to the optic nerve. It contains 

parasympathetic nerve fibres that innervates the 

sphincter pupillae. If damaged, the pupil fails 

to react to light and responds to accommodation 

sluggishly.

..

3. The parasympathetic nerve supply to the lacrimal gland travels

    through the following structure:

a. otic ganglion

b. styloid foramen

c. lesser petrosal nerve

d. cavernous sinus

e. pterygopalatine ganglion

AnswerAnswer: e

.

4. The following extraocular muscles are correctly paired as

     yoked muscles EXCEPT:

a. Right medial rectus and left lateral rectus

b. Right lateral rectus and left medial rectus

c. Right superior oblique and left inferior rectus

d. Right superior rectus and left inferior oblique

e. Right inferior rectus and left superior rectus

AnswerAnswer: e

Yoked muscles receive equal and simultaneous innervation in 

accordance with the Hering's law.

.

5. Which of the following muscle is supplied by the contralateral 

    oculomotor nucleus?

a. inferior rectus

b. inferior oblique

c. medial rectus

d. superior rectus

e. levator superioris

AnswerAnswer: d

The levator superioris is supplied a central group of oculomotor 

nucleus. The superior rectus is supplied by contralateral nucleus 

and the remaining muscles ie. inferior rectus, inferior oblique and 

medial recti are supplied by ipsilateral nucleus.