Test 86    (head and neck anatomy)

1. The pituitary  gland:

a. is about 2 cm in transverse diameter

b. is not covered by meninges

c. is connected to the thalamus by the infundibulum

d. is separated from the floor of the pituitary fossa by a 
    venous sinus

e. is supplied by a single inferior and several superior
    hypophyseal arteries.

Answera.F   b.F  c.F  d.T  e.T
The pituitary gland is about 1 cm in transverse 
diameter.
The meninges blend with the capsule of the gland.
The infundibulum connects to the tuber cinereum of hypothalamus.

2. In the subarachnoid spaces:

a. the basilar artery lies in the interpeduncular cistern

b. communication occurs with the fourth ventricle

c. the cistern magna is continuous with the spinal 
    subarachnoid space 

d. the arachnoid granulation causes small pits at the base
    of the skull.

e. the choroid plexus are found on the surface of the brain 

Answera.F   b.T   c.T  d.T  e.F
The basilar artery lies on the pontine.
The choroid plexus are found in the ventricles 
where they produce the cerebrospinal fluid.

3. Regarding the cranial nerves:

a. the oculomotor nerve runs in the lateral wall of the
    cavernous sinus

b. the maxillary nerve enters the orbit through the inferior
    orbital fissure

c. the facial nerve turns forwards at the genicular ganglion

d. the optic nerve is the only structure that passes through
    the optic canal

e. the left recurrent laryngeal nerve arises from the vagus 
    at the level of the subclavian artery.

Answera.T   b.T  c.F  d.F  e.F
The facial nerve turns backwards at the genicular ganglion.
The ophthalmic artery also enters the optic canal.
The left recurrent laryngeal nerve arises from the 
vagus at the arch of the aorta where as right recurrent laryngeal nerve arises at the level of the subclavian artery.

4. The following anatomy of the posterior cranial fossa are true:

a. the facial nerve nucleus lies in the medullar oblongata

b. the medulla oblongata lies in the floor of the fourth 
    ventricle

c. the third ventricle separates the cerebellum from the 
    pons and the medulla oblongata

d. the cerebellar vermis lies below the straight sinus

e. the basilar artery is formed from the fusion of vertebral
    arteries.

Answera.F  b.T  c.F   d.T   e.T
The facial nerve nucleus is found in the pons.
The fourth ventricle separates the cerebellum from the pons and the medulla oblongata.

5. The pineal gland:

a. lies between the inferior colliculus

b. is directly inferior to the splenium of the corpus 
    callosum

c. receives blood supply from the posterior choroidal
    arteries

d. lies within 3 mm of the midline

e. calcification is a sign of malignancy

Answera.F   b.F  c.T  d.T   e.F
It is situated between the superior colliculus.
It is separated from the splenium of the corpus callosum by the tela choroidea of the third ventricle.

 
 

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