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Questions and Answers
Which of the following is true regarding lesions in the spinothalamic tracts?
Which of the following is true regarding lesions in the spinothalamic tracts?
- They cause loss of position and vibration sense on the same side of the body.
- They cause impairment in the ability to appreciate pain and temperature on the ipsilateral side of the body below the level of the lesion.
- They cause impairment in the ability to appreciate pain and temperature on the contralateral side of the body below the level of the lesion. (correct)
- They do not affect the ability to appreciate pain and temperature
Which of the following is a symptom of lesions in the posterior column of the spinal cord?
Which of the following is a symptom of lesions in the posterior column of the spinal cord?
- Loss of position and vibration sense on the same side of the body. (correct)
- Impairment in the ability to appreciate pain and temperature on the contralateral side of the body below the level of the lesion.
- Loss of various modalities of sensation on the opposite side of the body.
- Sensory ataxia is more marked when the eyes are open.
What may occur due to thalamic lesions?
What may occur due to thalamic lesions?
- Spontaneous pain of most unpleasant quality in the same side of the body.
- Spontaneous pain of most unpleasant quality in the opposite side of the body. (correct)
- Loss of various modalities of sensation on the same side of the body.
- Loss of various modalities of sensation on the opposite side of the body.
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Study Notes
- Lesions in the posterior column of the spinal cord cause loss of position and vibration sense on the same side.
- Sensory ataxia and difficulty standing upright may occur due to the loss of proprioceptive sensations.
- Lesions in the spinothalamic tracts cause impairment in the ability to appreciate pain and temperature on the contralateral side of the body below the level of the lesion.
- Touch is usually modified but not abolished due to its alternative pathway in the posterior columns.
- Lesions in the upper brainstem usually affect all forms of sensation on the contralateral side of the body.
- Lesions of the main sensory nuclei of the thalamus may cause loss of various modalities of sensation on the opposite side of the body.
- Spontaneous pain of most unpleasant quality in the opposite side of the body may occur due to thalamic lesions.
- Sensory ataxia is more marked when the eyes are closed.
- First-order neurons of the proprioceptive nerve fiber may be damaged peripherally, causing similar symptoms associated with other signs of peripheral nerve disease.
- Romberg's test may be used to test for sensory ataxia.
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