Tonically discharging putamen neurons exhibit set-dependent responses.

Abstract
Previous microelectrode recordings in the putamen of monkeys [Macaca mulatta] have revealed a class of tonically active neurons without apparent behavioral correlates. Such neurons have responses to stimuli that trigger movement, but these responses disappear when motor responses to the stimuli are extinguished. The short latency of the responses (less than for other putamen neurons) suggests that they may play a role in linking conditioned stimuli and responses.