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Titolo:
Hierarchy within human SI: supporting data from cytochrome oxidase, acetylcholinesterase and NADPH-diaphorase staining patterns
Autore:
Eskenasy, ACC; Clarke, S;
Indirizzi:
Univ Lausanne, Inst Physiol, CH-1005 Lausanne, Switzerland Univ Lausanne Lausanne Switzerland CH-1005 CH-1005 Lausanne, Switzerland CHUV, Div Neuropsychol, Lausanne, Switzerland CHUV Lausanne SwitzerlandCHUV, Div Neuropsychol, Lausanne, Switzerland
Titolo Testata:
SOMATOSENSORY AND MOTOR RESEARCH
fascicolo: 2, volume: 17, anno: 2000,
pagine: 123 - 132
SICI:
0899-0220(2000)17:2<123:HWHSSD>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOMATOSENSORY-EVOKED POTENTIALS; HUMAN CEREBRAL-CORTEX; PYRAMIDAL NEURONS; VISUAL-CORTEX; MONKEY; AREAS; SOMATOTOPY; MOTOR; FMRI;
Keywords:
primary somatosensory cortex; motor cortex; cytoarchitecture; histochemistry; parallel processing; human;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Clarke, S Univ Lausanne, Inst Physiol, Rue Bugnon 7, CH-1005 Lausanne, Switzerland Univ Lausanne Rue Bugnon 7 Lausanne Switzerland CH-1005 zerland
Citazione:
A.C.C. Eskenasy e S. Clarke, "Hierarchy within human SI: supporting data from cytochrome oxidase, acetylcholinesterase and NADPH-diaphorase staining patterns", SOMAT MOT R, 17(2), 2000, pp. 123-132

Abstract

The human primary somatosensory cortex consists of four cytoarchitectonic subdivisions (3a, 3b, 1 and 2) that are likely to contain distinct somatosensory representations. The intraareal organization of these areas as well as that of the primary motor cortex (area 4) has been analyzed using histochemical stains of cytochrome oxidase, acetylcholinesterase and NADPH-diaphorase activity in normal human brains. Cytochrome oxidase activity was revealed in individual cortical neurons and neuropil. Areas 4, 3a and 3b were on average darker than areas 1 and 2. The laminar distribution of cytochrome oxidase activity varied in different areas. A prominent dark band was present in layers TV and lower III in areas 3a and 3b and in layer III in areas 1, 2 and 4. Acetylcholinesterase staining revealed fibers and pyramidal cells in layers III and V; stained layer III pyramids were rare in areas 3a and3b and numerous in areas 1, 2 and 4. NADPH-diaphorase positive elements included Golgi-like stained non-pyramidal neurons and Nissl-like stained pyramidal neurons; the former were found, in small numbers, in layer II of areas 4, 3a, 3b and 1, and the latter in layers III and V of areas 4 and 3a andin layer V of areas 1 and 2. The dark cytochrome oxidase staining of layerIV and the paucity of acetylcholinesterase positive pyramids in areas 3a and 3b resemble the pattern found in primary visual and auditory areas, whereas the dark cytochrome oxidase staining in layer III and abundance of acetylcholinesterase positive pyramids in areas 1 and 2 that of association areas. These results suggest that the four areas included in human SI constitute hierarchical stages of cortical processing, with 3a and 3b correspondingto primary and 1 and 2 to secondary areas.

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Documento generato il 01/04/20 alle ore 10:27:05