PubMed · 7225792
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R Rausch. 1981. Lateralization of temporal lobe dysfunction and verbal encoding.. https://doi.org/10.1016/0093-934x(81)90006-7
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We examined a patient who was clinically much better at reporting tactile stimulation when he could see his stimulated hand. Experimentally, we found that he had difficulty detecting taps accompanied by a salient (but not predictive) light located directly above his concealed hand. However, his performance was dramatically improved if the light was attached to a rubber hand situated in line with the patient's hidden hand. Previous studies have suggested that tactile sensitivity can be improved by nearby visual stimulation. However, our effect shows that crossmodal sensory facilitation does not only depend upon simple spatial proximity alone. Rather, a simultaneous visual event dramatically improves perception of touch specifically when it is attributed to the perceiver's stimulated limb.
When the two eyes were exposed dichoptically to two oppositely moving patterns, the alternating OKN was elicited, in which the eye movements tracked the two moving stimuli alternately. In the present experiment, two oppositely moving stimuli were periodically exchanged between the eyes, the results showed that the alternation of OKN direction was not affected by this exchange. It suggests that alternating OKN was not controlled by rivalry between the two eyes but between two perceived motion patterns.
We report a diagnostic sign of ulnar neuropathy. Function of the interossei is tested by asking the patient to hold a sheet of paper between the middle and ring fingers, by adducting the fingers while the examiner pulls it firmly away. The metacarpophalangeal joints will flex more on the affected side as the flexor tendons are recruited. This test can easily detect muscle weakness in the early stage of ulnar neuropathy, and is produced by a similar mechanism to that of Froment's sign.