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The activity of single neurons was recorded extracellularly from the temporal pole of monkeys while they were performing a visual short-term memory task. Neurons in the ventral part of the temporal pole showed sustained firing during the memorization delay period of the task when the monkey was remembering particular visual stimuli. The presence and absence of the firing were correlated with the correct and incorrect performance of the task, respectively. The sustained firing showed oscillation. The data suggest that visual information was stored as sustained firing among certain group of neurons producing oscillations.
Nakamura et al. (Wed,) studied this question.