56. The ophthalmic artery:
a. is the first branch of the internal carotid artery
b. runs in the optic canal below and lateral to the optic nerve
c. remains within the subarachnoid space throughout its course
d. terminates at the medial end of the upper eyelid
e. has 10 branches
57. With respect to the branches of the ophthalmic artery:
a. the lacrimal artery runs on the upper border of the lateral
rectus
along with the lacrimal nerve
b. one of the branches of the lacrimal artery supplies the medial
rectus
c. the muscular arteries give origin to the ciliary arteries
d. there are 2 main groups of ciliary arteries
e. the long posterior ciliary arteries pierce the sclera to run in the
suprachoroidal space
58. The oculomotor nerve:
a. provides motor supply to the levator palpebrae superioris
b. innervates the superior, inferior and medial recti
c. supplies the superior oblique
d. carries the sympathetic supply to sphincter pupillae
e. supplies the ciliary muscle
59. With respect to the nuclei of IIIrd cranial nerve:
a. the motor nucleus lies in the midbrain at the level of the
super
colliculus
b. the motor nucleus lies posterior to the cerebral aqueduct
c. the motor nucleus receives unilateral corticonuclear fibres
d. the motor nucleus receives fibres from the medial longitudinal
fasciculus
e. the motor nucleus is subdivided into a single central group of
neurones that supply the levator palpebrae superioris
bilaterally
60. The trochlear nerve nucleus:
a. lies in the midbrain at the level of the superior colliculus
anterior
to the cerebral aqueduct
b. supplies the ipsilateral muscle
c. receives bilateral corticonuclear fibres
d. receives tectobulbar fibres that connect it to the visual cortex
via
the superior colliculus
e. when damaged by haemorrhage often affects the oculomotor
nucleus