We recorded from the left IT cortex of two macaque monkeys (Macacca radiata; Ka and Sa, age 7 y old) using standard neurophysiological procedures detailed previously (36 (link)). Recording sites were verified using MRI to be in the anterior ventral portion of the IT cortex. Extracellular wideband signals were recorded at 40 KHz using 24-channel laminar electrodes (Uprobe; 100-µm intercontact spacing; Plexon Inc.) linked to a neural data acquisition system (Plexon Inc.). These signals were manually sorted offline into distinct clusters using spike sorting software (OfflineSorter; Plexon Inc.). Only well-isolated visually responsive units were selected for further analyses. The numbers of recorded neurons in each experiment are reported below.