Nero Anatomy Compitative Questions And Answers

71. A 55-year-old patient presented with an 8-month history of gradually progressive incoordination in the right arm and leg. Examination revealed hypotonia and ataxia in the limbs on the right side. The most likely diagnosis is–
1. a stroke
2. a tumor
3. in the left cerebellar hemisphere
4. in the right cerebellar hemisphere
One or more answers may be correct. Select–
A. if 1, 2, and 3 are correct
B. if 1 and 3 are correct
C. if 2 and 4 are correct
D. if only 4 is correct
E. if all are correct
The answer is C.

72. The ventroposterior medial nucleus of the thalamus–
1. receives axons from neurons located in the contralateral cuneate nucleus in the medulla
2. receives axons from neurons located in area 4 on the medial surface of the ipsilateral cerebral hemisphere
3. contains neurons that respond to olfactory stimuli applied ipsilaterally
4. contains neurons whose axons project to the somatosensory cortex of the ipsilateral cerebral hemisphere
One or more answers may be correct. Select–
A. if 1, 2, and 3 are correct
B. if 1 and 3 are correct
C. if 2 and 4 are correct
D. if only 4 is correct
E. if all are correct
The answer is D.

73. Lesions of the cerebral cortex on one side can result in a deficit in muscles innervated by the–
1. contralateral spinal motor neurons
2. ipsilateral spinal motor neurons
3. contralateral facial (VII) nerve
4. ipsilateral facial (VII) nerve
One or more answers may be correct. Select–
A. if 1, 2, and 3 are correct
B. if 1 and 3 are correct
C. if 2 and 4 are correct
D. if only 4 is correct
E. if all are correct
The answer is B.

74. The solitary nucleus–
1. serves visceral functions, none of which are consciously perceived
2. gives rise to preganglionic parasympathetic axons
3. mediates pain arising from the heart during myocardial ischemia
4. receives axons running with nerve VII
One or more answers may be correct. Select–
A. if 1, 2, and 3 are correct
B. if 1 and 3 are correct
C. if 2 and 4 are correct
D. if only 4 is correct
E. if all are correct
The answer is D.

75. After transection of the peripheral nerve, the–
1. axons and Schwann cells distal to the cut undergo degeneration and disappear
2. sensory axons distal to the cut survive, but motor axons degenerate
3. motor neurons whose axons were cut degenerate and disappear
4. surviving axons of the proximal stump will send out new growth cones to attempt regeneration
One or more answers may be correct. Select–
A. if 1, 2, and 3 are correct
B. if 1 and 3 are correct
C. if 2 and 4 are correct
D. if only 4 is correct
E. if all are correct
The answer is D.

76. Wernicke's aphasia is usually caused by–
A. a lesion in the superior temporal gyrus
B. a lesion in the inferior temporal gyrus
C. a lesion in the inferior frontal gyrus of the dominant hemisphere
D. lesions in the midbrain
E. alcohol abuse
The answer is A.

77. The trigeminal nuclear complex–
1. has somatic afferent components
2. participates in certain reflex responses of cranial muscles
3. has a branchial efferent component
4. receives projections of axons coursing with nerve X
One or more answers may be correct. Select–
A. if 1, 2, and 3 are correct
B. if 1 and 3 are correct
C. if 2 and 4 are correct
D. if only 4 is correct
E. if all are correct
The answer is A.

78. In a motor neuron at rest, an excitatory synapse produces an EPSP of 15 mV, and an inhibitory synapse produces an IPSP of 5 mV. If both the EPSP and IPSP occur simultaneously, then the motor neuron would–
A. depolarize by about 10 mV
B. depolarize by 20 mV
C. depolarize by more than 20 mV
D. change its potential by less than 1 mV
The answer is A.

79. Axons in the optic nerve originate from–
A. rods and cones
B. retinal ganglion cells
C. amacrine cells
D. all of the above
The answer is B.

80. Meyer's loop carries optic radiation fibers representing–
A. the upper part of the contralateral visual field
B. the lower part of the contralateral visual field
C. the upper part of the ipsilateral visual field
D. the lower part of the ipsilateral visual field
The answer is A.

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