Test 11
51. The anterior cerebral artery:
a. meets in the midline with its opposite fellow 

b. ascends in the longitudinal fissure and bends backwards over the 
    corpus callosum 

c. gives off the recurrent artery of Heubner proximal to the anterior 
    communicating artery 

d. gives off the recurrent srtery of Heubner, that supplies the head of 
    caudate,putamen, anterior limb, genu and posterior limb of the 
    corpus callosum 

e. has branches that arch over on to the lateral surface of the 
    hemispheres to supply a narrow strip of cortex. 


52. The vertebral arteries:

a. ascend through foramina in the transverse processes of the upper 
    6 cervical vertebrae 

b. enter the skull via the foramen of Luschka 

c. give off anterior and posterior spinal arteries that supply the 
    medulla and spinal cord 

d. give off the Posterior inferior cerebellar arteries 

e. join at the cerebellopontine angle to form the basilar artery 


53. The posterior cerebral artery:

a. arises from the trifurcation of the basilar artery 

b. curves around the midbrain to reach the medial surface of the 
    cerebral hemispheres 

c. gives off the temporal artery to the superior surface of the 
    temporal lobe 

d. gives off the calcarine artery that supplies all of the primary and 
    part of the association visual cortex 

e. supplies the posterior choroidal artery that supplies the choroid 
    plexus of the central lateral ventricle 


54. The dura mater:
a. is the outermost, toughest meningeal covering 

b. is separated from the periosteum of the skull vault by an epidural 

c. is made up of collagen and elastic fibres in its outer layer 

d. is made up of columnar epithelium with interdigitating processes in 
    its inner layer 

e. forms the falx cerebri, tentorium cerebri and falx cerebelli  

f. is supplied by the trigeminal, vagus and upper cervical nerves 


55. With respect to the pia and arachnoid mater:

a. develop from the same embryological tissue 

b. the pia is intimately associated with the glial limiting membrane of 
    the central nervous system 

c. they both have tight junctions between the cells of their epithelium 

d. the subarachnoid space is a potential space 

e. arachnoid is avascular 

f. pia is avascular 

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