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Describe how stimulation of a neuron that has its cell body in the cerebrum could inhibit a reflex that is integrated within the spinal cord. |
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| 2 | |
A cancer patient has his left lung removed. To reduce the space remaining where the lung is removed, the diaphragm on the left side is paralyzed to allow the abdominal viscera to push the diaphragm upward. What nerve is cut? Where is a good place to cut it, and when would the surgery be done? |
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| 3 | |
Based on sensory response to pain in the skin of the hand, how could you distinguish between damage to the ulnar, median, and radial nerves? |
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| 4 | |
During a difficult delivery, the baby's arm delivered first. The attending physician grasped the arm and forcefully pulled it. Later a nurse observed that the baby could not abduct or adduct the medial four fingers and flexion of the wrist was impaired. What nerve was damaged? |
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| 5 | |
Two patients are admitted to the hospital. According to their charts, both have herniated disks that are placing pressure on the roots of the sciatic nerve. One patient has pain in the buttocks and the posterior aspect of the thigh. The other patient experiences pain in the posterior and lateral aspects of the leg and the lateral part of the ankle and foot. Explain how the same condition, a herniated disk, could produce such different symptoms. |
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| 6 | |
In an automobile accident a woman suffers a crushing hip injury. For each of the conditions given here, state what nerve is damaged.
- Unable to adduct the thigh
- Unable to extend the leg
- Unable to flex the leg
- Loss of sensation from the skin of the anterior thigh
- Loss of sensation from the skin of the medial thigh
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| 7 | |
A skier breaks his ankle. As part of his treatment, the ankle and leg are placed in a plaster cast. Unfortunately, the cast is too tight around the proximal portion of the leg and presses in against the neck of the fibula. Where would you predict the patient would experience tingling or numbness in the leg? Explain. |
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