Auditory belt-region neurons do not encode perceptual decisions.

Evidence

In the belt regions (ML and AL) of the ventral pathway, several lines of study from our laboratory suggest that this is not the case; but also see Niwa et al. 2013 . While monkeys categorized speech sounds, we tested whether neural activity was modulated by monkeys’ categorical judgements. We found that AL neurons were not modulated by the monkeys’ reports (Tsunada et al. 2011 , 2012 ). In a separate line of studies, we asked monkeys to listen to a sequence of tone bursts and report whether the sequence had a “low” or “high” pitch. We found that neither ML nor AL activity was modulated by the monkeys’ choices (Tsunada et al., in press ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 4889