Cortical coding

Cortical coding

The encoding of information in the primate inferior temporal visual cortex, hippocampus, orbitofrontal cortex, and insula is described. All these areas have sparse distributed graded firing rate representations. The firing rate probability distribution is close to exponential. The information increases approximately linearly with the number of neurons. Consistent with this relative independence...

Synaptic plasticity as a cortical coding scheme.

Processing of auditory information requires constant adjustment due to alterations of the environment and changing conditions in the nervous system with age, health, and experience. Consequently, patterns of activity in cortical networks have complex dynamics over a wide range of timescales, from milliseconds to days and longer. In the primary auditory cortex (AI), multiple forms of adaptation ...

Population coding in cortical area MST.

Disparity steps applied to large patterns elicit vergence eye movements at ultrashort latencies. Disparity tuning curves, describing the dependence of the amplitude of the initial vergence responses on the amplitude of the disparity steps, resemble the derivative of a gaussian and indicate that appropriate servo-like behavior occurs only with small disparity steps (<1 degree). Lesion data from ...

From Another Angle: Differences in Cortical Coding

We measured the information available for orientation discrimination from metric distances for 24 cells in area 17 of cats that were paralyzed and anesthetized with propofol and N2O. The metric distance information confirms fundamental coding differences for discrimination between fine (<10o) and coarse (>10o) orientation differences. The information for discriminating larger orientation differ...

Population Coding in Laminar Cortical Circuits