hypercolumn

A complete set of orientation columns over a cycle of 180º and of right and left dominance columns in the visual cortex. A hypercolumn may be about 1 mm wide. A hypercolumn of orientation columns is perpendicular to a hypercolumn of ocular dominance columns (Fig. H5). See blobs; cortical column.

Fig. H5 A hypercolumn consisting of one set of orientation columns and one set of ocular dominance columns in the visual cortex. Electrode 1 penetrating at right angle to the surface encounters neurons responding to the same orientation and the same (right) ocular dominance

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References in periodicals archive

Cell clusters at the meso level still manage to form more or less well defined functional units in terms of structure (e.g., the hypercolumn in the visual cortex) and in terms of activity (e.g., neural synchrony) (7).

The impact of sleep deprivation on the brain

This means that each orientation column has signal inputs from both the left and right eye (due to the fibre crossing at the chiasm), and a complete set of these ocular dominance columns combined with a complete set of orientation columns is referred to as a hypercolumn. (4) Within this hypercolumn arrangement, there are also columns that contain cytochrome oxidase called 'blobs' (see Figure 2).

Visual processing pathway: from retina to cortex

Cowan, "A spherical model for orientation and spatial-frequency tuning in a cortical hypercolumn," Philosophical Transactions of the Royal Society B: Biological Sciences, vol.

Neuronal ensemble decoding using a dynamical maximum entropy model

This can be made through the activation of a population of neurons or represented in a hypercolumn in the visual cortex, but being one or the other it has a specific pattern that allows that object to be recognised as unique.

Visual imagery without visual perception?

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