Neuroscience/Sample problems/Exam 1

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  1. Which of the following disorders is LEAST associated with corneal ulceration?
    1. Central seven
    2. Lower motor neuron lesion of the motor facial nucleus
    3. Cranial nerve V lesion
    4. Spinal trigeminal tract lesion
    5. Bell's palsy
  2. In which of the following would you expect to see muscle atrophy?
    1. Central seven
    2. Lesion of the corticospinal tract rostral to its decussation
    3. Lesion of the corticospinal tract caudal to its decussation
    4. Bell's palsy
    5. One-and-a-half syndrome
  3. All of the following cortical areas would have heterotypical granular neocortex EXCEPT:
    1. Primary visual cortex
    2. Brodmann area 3,1,2
    3. Brodmann area 6
    4. Brodmann area 17
    5. Brodmann area 41
  4. Which of the following associations is INCORRECT?
    1. Mesencephalic trigeminal nucleus → jaw reflex
    2. Facial motor nucleus → corneal blink reflex
    3. S3, S4 → anal wink reflex
    4. Upper motor neuron lesion → segmental areflexia
    5. Lower motor neuron lesion → fasciculations

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Answers

  1. A (ulceration results from inability to wink or lack of tear production
  2. D (muscle atrophy accompanies a LMN lesion and Bell's palsy is the only LMN lesion listed)
  3. C (heterotypical granular is associated with primary sensory cortex and BA 6 is premotor cortex)
  4. D (UMN lesion results in hyperreflexia)
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