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- W2078133603 abstract "The parieto-insular vestibular cortex (PIVC) is thought to contain an important representation of vestibular information. Here we describe responses of macaque PIVC neurons to three-dimensional (3D) vestibular and optic flow stimulation. We found robust vestibular responses to both translational and rotational stimuli in the retroinsular (Ri) and adjacent secondary somatosensory (S2) cortices. PIVC neurons did not respond to optic flow stimulation, and vestibular responses were similar in darkness and during visual fixation. Cells in the upper bank and tip of the lateral sulcus (Ri and S2) responded to sinusoidal vestibular stimuli with modulation at the first harmonic frequency and were directionally tuned. Cells in the lower bank of the lateral sulcus (mostly Ri) often modulated at the second harmonic frequency and showed either bimodal spatial tuning or no tuning at all. All directions of 3D motion were represented in PIVC, with direction preferences distributed approximately uniformly for translation, but showing a preference for roll rotation. Spatiotemporal profiles of responses to translation revealed that half of PIVC cells followed the linear velocity profile of the stimulus, one-quarter carried signals related to linear acceleration (in the form of two peaks of direction selectivity separated in time), and a few neurons followed the derivative of linear acceleration (jerk). In contrast, mainly velocity-coding cells were found in response to rotation. Thus, PIVC comprises a large functional region in macaque areas Ri and S2, with robust responses to 3D rotation and translation, but is unlikely to play a significant role in visual/vestibular integration for self-motion perception." @default.
- W2078133603 created "2016-06-24" @default.
- W2078133603 creator A5040043542 @default.
- W2078133603 creator A5058311748 @default.
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- W2078133603 date "2010-02-24" @default.
- W2078133603 modified "2023-09-30" @default.
- W2078133603 title "Macaque Parieto-Insular Vestibular Cortex: Responses to Self-Motion and Optic Flow" @default.
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- W2078133603 doi "https://doi.org/10.1523/jneurosci.4029-09.2010" @default.
- W2078133603 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3108058" @default.
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