…The olfactory system has a projection area in the anterior piriform cortex of the gyrus of the medial temporal lobe, but a secondary olfactory area in the frontal orbital cortex. The primary sensory area is generally characterized by a precise point-to-point correspondence with the peripheral skin, retina, and cochlear basement membrane, which is called topographic organization. As a result, the somatosensory area has a body part map representing each part of the body, the visual area has a retinal part map representing the position in the visual field, and the auditory area has a frequency part map representing the pitch of sound, all on the surface of the cerebral cortex. … *Some of the terminology that mentions "topographic organization" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…嗅覚(きゆうかく)系は側頭葉内側部の釣回の前梨状皮質が投射野であるが,前頭眼窩(がんか)皮質に二次的な嗅覚野がある。 第一次感覚野は一般に末梢の皮膚や網膜や蝸牛基底膜などと精密な点対点の対応関係を保っているのが特徴で,これを部位的局在機構topographic organizationという。その結果,体性感覚野には身体の各部分を表す体部位地図,視覚野には視野上の位置を表す網膜部位地図,聴覚野には音の高さを表す周波数部位地図が大脳皮質の表面にできあがっている。… ※「topographic organization」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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