Summary: Cerebral Cortex
Response Dynamics and Tilt versus Translation Discrimination in Parietoinsular
Sheng Liu, J. David Dickman and Dora E. Angelaki
Department of Neurobiology, Washington University School of Medicine, St Louis, MO 63110, USA
Address correspondence to Dr Dora Angelaki, Department of Anatomy and Neurobiology, Box 8108, Washington University School of Medicine, 660
South Euclid Avenue, St Louis MO 63110, USA. Email: firstname.lastname@example.org.
The parietoinsular vestibular cortex (PIVC) is a large area in the
lateral sulcus with neurons that respond to vestibular stimulation.
Here we compare the properties of PIVC cells with those of
neurons in brain stem, cerebellum, and thalamus. Most PIVC cells
modulated during both translational and rotational head motion.
Translation acceleration gains showed a modest decrease as
stimulus frequency increased, with a steeper slope than that
reported previously for thalamic and cerebellar nuclei neurons.
Response dynamics during yaw rotation were similar to those
reported for vestibular neurons in brain stem and thalamus: velocity
gains were relatively flat through the mid-frequency range,
increased at high frequencies, and decreased at low frequencies.