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Somatosensory Pathways and Perception

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Your patient is experiencing contralateral loss of pain and ipsilateral loss of touch on their right leg; where would a lesion be to produce these symptoms?

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A. Spinal cord

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B. Upper medulla

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C. Ventroposterior nucleus of the thalamus

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D. Sensory cortex

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A. Spinal cord

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Similarly, at what level in the projections of sensation, would you expect a lesion to create contralateral loss of both pain/temperature and touch?

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A. Above the lower medulla

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B. Below the lower medulla

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A. Above the lower medulla

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If there were a condition that resulted in the absence of Ruffini receptors, what types of sensation would be disrupted?

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A. Tension and touch

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B. Touch and stretch

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C. Pain and touch

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D. Tension and pain

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B. Touch and stretch

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Which is a monosynaptic reflex?

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A. Ib activation of the heteronymous muscle

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B. Ib activation of the homonymous muscle

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C. Ia activation of the heteronymous muscle

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D. Ia activation of the homonymous muscle

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D. Ia activation of the homonymous muscle

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Which commonly used sensory test requires no additional equipment to perform?

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A. Sharp/dull

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B. Graphesthesia

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C. Stereognosis

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D. Two point discrimination

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B. Graphesthesia

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A stroke disrupting the medial posterior thalamic nucleus would disrupt sensation from which part of the body?

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A. Arms

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B. Legs

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C. Face

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D. Trunk

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C. Face

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Your patient is experiencing hyperalgesia on the left side of her face, occurring when her hair touches it. Damage to what cranial nerve, associated with facial sensation, would it most likely be associated with?

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A. Cranial nerve V

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B. Cranial nerve VII

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C. Cranial nerve IX

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D. Cranial nerve ...

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