Specificity of monosynaptic connections from thalamus to visual cortex

Article Abstract:

The connections between thalamic and cortical neurons depends on specific relation between geniculate X cells and simple cells. The probability of monosynaptic connection is highest if the X cell is well centered over the strongest simple subregion. The intracortical connections may play a role in strengthening orientation selectivity. The study also demonstrates the importance of the geniculate input in the creation of simple receptive fields.

Observations, Thalamus, Visual cortex

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Highly ordered arrangement of single neurons in orientation pinwheels

Article Abstract:

Two-photon calcium imaging was used in vivo to determine the microstructure of pinwheel centers in cat visual cortex with single cell resolution. It was found that pinwheel centers are highly ordered, neurons selective to different orientations are clearly segregated even in the very center and suggests great precision in the development of cortical circuits underlying orientation selectivity.

Massachusetts, Analysis, Fluorescence, Gaussian processes, Nerves, Peripheral, Peripheral nervous system

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Functional imaging with cellular resolution reveals precise micro-architecture in visual cortex

Article Abstract:

Neurons in the cerebral cortex are organized into anatomical columns, with ensembles of cells arranged from the surface to the white matter. Within a column, neurons often share functional properties, such as selectivity for stimulus orientation; columns with distinct properties, such as different preferred orientations, and tile the cortical surface in orderly patterns.

United States, Cerebral cortex

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