Robust vestibular self-motion signals in macaque posterior cingulate region

Self-motion signals, distributed ubiquitously across parietal-temporal lobes, propagate to limbic hippocampal system for vector-based navigation via hubs including posterior cingulate cortex (PCC) and retrosplenial (RSC). Although numerous studies have indicated areas are involved in spatial tasks, it is unclear how their neurons represent self-motion signals. Providing translation rotation stimuli macaques on a 6-degree-of-freedom motion platform, we discovered robust vestibular responses PCC. A combined three-dimensional spatiotemporal model captured data well revealed multiple temporal components velocity, acceleration, jerk, position. Compared PCC, RSC contained moderate modulations lacked significant tuning. Visual signals were much weaker both regions compared the We conclude that macaque region carries vestibular-dominant with plentiful could be useful path integration.