Glossary

callosal connections Pathways that link the two cerebral hemispheres. In the visual system, many callosal pathways link the representations of the vertical meridian in each hemisphere. The representation of the vertical meridian, and thus the location of callosal pathways, forms the border between many cortical areas.

chemoarchitecture The study of the anatomical subdivisions of the brain based on the differential distributions of various neurotransmitters or other chemicals.

cortical area A subdivision of the cerebral cortex that is based on a combination of physiological and anatomical criteria. These criteria in the visual system include a topographic representation of visual space, a distinct cyto-, myelo-, pigmento-, or chemoarchitecture, a distinct pattern of cortical and subcortical connections, distinct receptive field properties of constituent neurons, and a distinct behavioral deficit following its lesion or deactivation.

cytoarchitecture The study of the anatomical subdivisions of the brain based on the size, shape, density, and laminar organization of neurons.

magnetic resonance imaging A collection of imaging techniques that provide either anatomical (MRI) or functional (fMRI) views of the organization of the brain.

myeloarchitecture The study of the anatomical subdivisions of the brain based on the laminar distribution and density of myelinated axons.

pigmentoarchitecture The study of the anatomical subdivisions of the brain based on the size, density, and laminar distribution of cells based on their content of pigment-containing granules.

positron emitted tomography A brain imaging technique that utilizes positron-emitting compounds (often O15-labeled water) to detect functionally active brain regions during the performance of a specific task.

topographic mapping The analysis of the organization of the visual system based on the systematic representation of visual space within each cortical area. Most cortical areas adjoin each other at the representation of either the vertical or horizontal meridian. Two parameters of visual space are extracted for each recording site during topographic mapping: eccentricity and polar angle.

Area V2 is an extrastriate visual area located immediately adjacent to the primary visual cortex in the occipital lobe. This article will describe the known anatomical features of V2 and discuss physiological studies of its topographic organization and functional properties. These studies are discussed with respect to similar studies performed in nonhuman primates.

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Breaking Bulimia

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