Thalamic neuronal populations responding selectively to remembered words

In 16 Parkinson patients treated with implanted electrodes, the multiunit impulse activity of 165 neuronal populations was recorded as a part of the diagnostic procedures during the performance of a set of verbal psychological tests. 10 neuronal populations in the thalamus revealed selective responses to visual presentation of the target words remembered prior to the test or to the presentation of both the target words and of the words closely resembling the targets graphically.