Dissociated loss of vibration, joint position and discriminatory tactile senses in disease of spinal cord and brain.

摘要: The clinical functions of the posterior columns spinal cord and signs disease these structures have been debated for years. Todd in 1847 Schiff 1858 knew 10 years later Brown-Sequard as well. Reynolds, Romberg, Duchenne, each described a column syndrome based on which primary lesion was not columns. In last 150 almost every white matter structure has credited with serving sensations that we now know are function Vibration, joint position movement well discriminatory touch seem to be served by separate fibres medial lemniscus. There is evidence this cat man. These may lost individually, totally, or certain stereotyped combinations. Vibration sense commonly alone. When sensation one other sense, it inevitably sense. Absent vibration normal appears unknown. This functional separation continues into thalamus. At highest level there no any conscious somatosensory cortical affiliation, while senses definitely do.