Test 96  (anatomy of the central nervous system)
1. The following are true about the anatomy of pons:
a. pons has fibres which form the cerebellar peduncles

b. trigeminal nerve arises at the mid-pon level

c. posterior surface of the pons forms the upper part 
    of the floor of the fourth ventricle.

d. the 6th, 7th and 8th nerves emerge from lateral to 

e. the nuclei of its cranial nerve lies in the dorsal part

2. In the medulla oblongata:

a. the anterior median fissure of the spinal cord begins 
    at the lower border of pons

b. olives are situated medial to the pyramid

c. gracile tubercle lies medial to the cuneate tubercle.

d. hypoglossal nerve leaves the medulla between 
    pyramid and olive

e. the 9th and 10th cranial nerves leave between the olive
    and the inferior cerebellar peduncle.

3. In the cerebral cortex:

a. central sulcus of Rolando separates the frontal from 
    the parietal lobes.

b. the lateral sulcus separates the temporal from the 
    frontal lobe

c. motor cortex is mainly on the parietal lobe

d. insula is located in the floor of the lateral sulcus

e. temporal lobe is separated into three gyri by three
    vertical gyri

4. The pituitary gland:

a. is extra-dural

b. tumour of the gland can cause junctional scotoma

c. is ectodermal in origin

d. lies above the diaphragm sellae.

e. lies medial to the cavernous sinuses.

5. The following are true about the cerebellum:

a. is attached to the brain stem by three firbe bundles.

b. the fissura prima is at its lower surface

c. the nodule is the most caudal part of the vermis

d. the nucleus interpositum lies medial to the dentade 

e. the visible surface of the cerebellum accounts for about
    one-sixth of the cortical area.

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