Section 1
Head and Neck mcqs
1)
Regarding the superior orbital fissure, which is INCORRECT?
a)
its common tendinous ring binds the SOF content of nerves and muscles to the contents of the optic
canal
b)
the origin of levator palpebrae superioris is its bony upper margin
c)
lacrimal, frontal and trochlear nerves pass through it
d)
the oculomotor, abducens and nasociliary nerves lie within the cone of the extraocular muscles
2)
Regarding the extraocular muscles:
a)
they all arise from a common tendinous ring around the superior orbital fissure
b)
the rectus muscles all pass laterally to their point of insertion because of the angle of the orbital apex
within the skull
c)
the superior oblique muscle passes through the trochlear, a fibrocartilage loop attached to the frontal
bone lateral margin, just behind the orbital margin
d)
except for superior oblique, all nerve supply to muscles enter from their optic side
3)
With regards to eye movement, which is INCORRECT?
a)
the medial and lateral rectus evoke simple horizontal movement only
b)
the inferior oblique turns the eye down and out
c)
the superior rectus turns the eye up and in
d)
the inferior rectors and superior oblique together produce vertical down gaze
4)
Which is INCORRECT?
a)
in a 4
th
cranial nerve paralysis, the affected eye lies slightly inturned
b)
in a 6
th
cranial nerve palsy, the lateral rectus is affected
c)
in a 3
rd
nerve palsy, levator palpebrae is affected
d)
in an oculomotor nerve palsy the eye looks down and out
5)
With regards to the retina, which is CORRECT?
a)
the retina covers the inner surface of the choroids and is light sensitive everywhere except at the
corneal area
b)
the optic disc contains retina that is completely free of blood vessels and is yellowish in colour
c)
the optic disc and fovea are of similar size
d)
the fovea contains no blood vessels or cones, but a high concentration or rods
6)
The nasal septum consists of:
a)
the maxilla
b)
the vomer and ethmoid bones
c)
the sphenoid and ethmoid bones
d)
the frontal, zygoma and maxilla
e)
the vomer and palatine bones