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Home , Lateral lemniscus, Trigeminal lemniscus

SAMPLE TEST QUESTIONS

Select the one best answer. l. The olfactory is attached to the: A. B. Telencephalon C. D. Mesencephalon E. Myelencephalon

2. Following complete transection of a peripheral nerve, all the following may occur except: A. Chromatoloysis in the cell body. B. Degeneration of peripheral myelin distal to the site of injury. C. Degeneration of the distal to the site of injury. D. Immediate restoration of normal function following prompt surgical repair. E. Outgrowth of axonal sprouting from the proximal nerve stump ..

3. A lesion of the left causes: A. Loss of taste sensation on the left side of the tongue. B. Deviation of the tongue to the right side, upon protrusion. C. Total inability to protrude the tongue. D. Deviation of the tongue to the left, upon protrusion. E. Hoarseness.

4. In the brain stem, the principle f0r general sensation ca~ried in the posterior columns of the forms the: A. Medial . B. . C. Central tegmental fasciculus D. Medial longitudinal fasciculus E. Spinal lemniscus.

5. All are true of the lateral except: A. It caries sensations of and thermal sense. B. Fibers from sacral origin are located in the ventro-medial portion of the tract. C. Decussation occurs within one or two spinal segments of its origin. D. Fibers of cervical origin are located in the ventro-medial portion of the tract. E. It forms part of the brain stem lemniscal systems. 81

6. A unilateral lesion of the involving the genu and the posterior limb, would cause: A. Contralateral total facial paralysis. B. Contralateral limb paralysis and ipsilateral lower facial paralysis. C. Ipsilateral limb paralysis and ipsilateral lower facial paralysis. D. Contralateral limb paralysis and contralateral lower facial paralysis. E. Ipsilateral total facial paralysis and contralateral limb paralysis.

7. Total occlusion of the right posterior cerebral artery: A. Causes total blindness. B. Causes no deficits because the right hemisphere is not dominant. C. Results in right homonymous hemianopsia. D. Results in left homonymous hemianopsia. E. Causes diplopia.

8. Structures traversing the incisural notch of the tentorium cerebelli include all the following except: A. . B. . C. Posterior cerebral artery. D. . E. .

9. Lesions of the may cause all the following except: A. Hypotonia. B. Ataxia. C. Dysmetria. D. Hemiballismus. E. Asynnergy.

10. Structures involved in the auditory pathway include all except: A. Medial geniculate body. B. . C. Lateral geniculate body. D. Lateral lemniscus. E. Superior olivary nucleus. 82

For Questions 11, 12, and 13, match the following thalamic nuclei with their principle afferent connections: A. Posterior ventral lateral. B. Posterior ventral medial. C. Lateral ventral. D. Anterior ventral. 11. Brachium conjunctivum. 12. Thalamic fasciculus. 13. .

For Questions 14, 15 and 16, match destructive lesions in the following locations with the appropriate deficits: A. Hippocampus. B. Inferior frontal gyrus C. Middle frontal gyrus. D. Angular gyrus. 14. Motor aphasia. 15. Deviation of eyes to the side of the lesion. 16. Memory impairment.

17. Dynamic receptors responding to angular acceleration are found in the: A. Utricle. B. Ampullae of semicircular canals. C. . D. Helicotrema E. Organ of Corti.

18. Choroid plexus is found in all the following places except: A. Anterior horn of lateral ventricle. B. Foramen of Monroe. C. Roof of fourth ventricle. D. Roof of third ventricle E. Temporal horn of lateral ventricle.

19. Regarding upper motor neurons of the pyramidal system, all are correct except: A. They form the cortico spinal tract. B. If damaged, may result in upgoing toe sign (Baninski sign). C. They terminate as motor end plates on striped muscle. D. They include fibers of the cortico bulbar system. E. They comprise part of the internal capsule. 83

20. All of the following are part of the limbic system exceEt: A. Septal area. B. . c. Amygdaloid nucleus. D. Hippocampus. E. Cingulate gyrus.

2l. The right fasciculus gracilis carries impulses of: A. Position sense from the left leg. B. Thermal sense from the right leg C. Position sense from the right arm D. Position sense from the right leg. E. position sense from the left foot.

22. Structures found in the include all exceEt: A. . B. Motor trigeminal nucleus. C. Medial longitudinal fasciculus. D. . E. .

23. Hypothalmic neurons secreting transmitters from terminating ~n the are found in the: A. Posterior hypothalamic nucleus. B. The lateral tuberal nucleus. C. . D. . E. Medial tuberal nucleus.

24. All the following may result from lesions except: A. Hemiballismus. B. Huntington's chorea. C. Intentional tremor. D. Athetosis. E. Dyskinesia.

25. The hypoglossal nerve emerges from the brain stem: A. Between the olive and the pyramid. B. Between the olive and the trigeminal eminence. C. Between the pyramids. D. In the ponto medullary sulcus. E. Caudal to the pyramidal decussation. 84

ANSWERS:

I. B 7. D 13. B 19. C 25. A 2. D 8. D 14. B 20. B 3. D 9. D 15. C 2I. D 4. A 10. C 16. A 22. D 5. B II. C 17. B 23. C 6. D 12. D 18. A 24. C