| dissociated anaesthesia | Loss of some types of sensation with persistence of others; most often used in context of nerve blocks, wherein a loss of sensation for pain and temperature occurs without loss of tactile sense. (05 Mar 2000) |
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| dissociated nystagmus | A nystagmus in which the movements of the two eyes are dissimilar in direction, amplitude, and periodicity. Synonym: dysjunctive nystagmus, incongruent nystagmus, irregular nystagmus. (05 Mar 2000) |