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Globs are millimeter-sized color modules found beyond the visual area V2 in the brain's color processing ventral (also known as parvocellular) pathway. They are scattered throughout the posterior inferior temporal cortex in an area called the V4 complex. They are clustered by color preference, and organized as color columns. They are the first part of the brain in which color is processed in terms of the full range of hues found in color space. The term "glob" was proposed by Bevil R. Conway and Doris Y. Tsao〔Conway BR, Moeller S, Tsao DY. (2007). Specialized color modules in macaque extrastriate cortex. Neuron. 56(3):560-73. PMID 17988638〕〔Conway BR, Tsao DY. (2009). Color-tuned neurons are spatially clustered according to color preference within alert macaque posterior inferior temporal cortex. Proc Natl Acad Sci U S A. 106:18035-18039. PMID 19805195〕 on an analogy with the cytochrome-oxidase blobs of V1, an earlier stage in the hierarchical elaboration of color.〔Livingstone MS, Hubel DH. (1984). (Anatomy and physiology of a color system in the primate visual cortex. ) J Neurosci. 4(1):309-56. PMID 6198495〕 This also distinguishes them from other types of modules found elsewhere in the cerebral cortex such as face patches, and inferior temporal feature columns.〔〔 ==Properties== Globs are found in the V4 complex, an area in the inferior temporal cortex, forward of area V3, that includes areas V4, the dorsal part of the posterior inferior temporal cortex and the rear part of the inferior temporal near the occipital lobe called TEO. Their neurons are not restricted to a single color preference. Neurons in adjacent glob cells have similar color tuning and form clusters that are arranged spatially within the cortex.〔 In between them are ‘‘interglob’’ areas that were not color sensitive but respond to shape.〔 The color-tuned neurons are arranged in color columns that are of a finer scale than single globs. These columns are between 50 and 100 μm in size. Color preferences of neurons recorded sequentially along given columns are arranged according to a chromotopic map that reflects perceptual color space.〔 They are studied using functional MRI〔 and single-unit recording.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Glob (visual system)」の詳細全文を読む スポンサード リンク
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