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Titolo:
Fast reaction to different sensory modalities activates common fields in the motor areas, but the anterior cingulate cortex is involved in the speed of reaction
Autore:
Naito, E; Kinomura, S; Geyer, S; Kawashima, R; Roland, PE; Zilles, K;
Indirizzi:
Karolinska Inst, Div Human Brain Res, Dept Neurosci, S-17177 Stockholm, Sweden Karolinska Inst Stockholm Sweden S-17177 osci, S-17177 Stockholm, Sweden Gifu Univ, Sch Med, Inst Equilibrium Res, Gifu 500, Japan Gifu Univ GifuJapan 500 Sch Med, Inst Equilibrium Res, Gifu 500, Japan Tohoku Univ, Inst Dev Aging & Canc, Dept Med Nucl & Radiol, Sendai, Miyagi980, Japan Tohoku Univ Sendai Miyagi Japan 980 cl & Radiol, Sendai, Miyagi980, Japan Univ Dusseldorf, Dept Neuroanat, D-40001 Dusseldorf, Germany Univ Dusseldorf Dusseldorf Germany D-40001 , D-40001 Dusseldorf, Germany Univ Dusseldorf, C&O Vogt Inst Brain Res, D-40001 Dusseldorf, Germany UnivDusseldorf Dusseldorf Germany D-40001 , D-40001 Dusseldorf, Germany Res Ctr Julich, Inst Med, D-52425 Julich, Germany Res Ctr Julich Julich Germany D-52425 Inst Med, D-52425 Julich, Germany
Titolo Testata:
JOURNAL OF NEUROPHYSIOLOGY
fascicolo: 3, volume: 83, anno: 2000,
pagine: 1701 - 1709
SICI:
0022-3077(200003)83:3<1701:FRTDSM>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
POSITRON EMISSION TOMOGRAPHY; PRIMARY SOMATOSENSORY CORTEX; MOVEMENT-RELATED ACTIVITY; PREMOTOR CORTEX; MACAQUE MONKEY; HUMAN BRAIN; ARM MOVEMENTS; MESIAL AREA-6; FRONTAL-LOBE; CORTICAL CONNECTIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
72
Recensione:
Indirizzi per estratti:
Indirizzo: Roland, PE Karolinska Inst, Div Human Brain Res, Dept Neurosci, Berzelius Vaeg 3, S-17177 Stockholm, Sweden Karolinska Inst Berzelius Vaeg 3 Stockholm Sweden S-17177 eden
Citazione:
E. Naito et al., "Fast reaction to different sensory modalities activates common fields in the motor areas, but the anterior cingulate cortex is involved in the speed of reaction", J NEUROPHYS, 83(3), 2000, pp. 1701-1709

Abstract

Fast reaction to different sensory modalities activates common fields in the motor areas, but the anterior cingulate cortex is involved in the speed of reaction. J. Neurophysiol. 83: 1701-1709, 2000. We examined which motor areas would participate in the coding of a simple opposition of the thumb triggered by auditory, somatosensory and visual signals. We tested which motor areas might be active in response to all three modalities, which motor structures would be activated specifically in response to each modality, andwhich neural populations would be involved in the speed of the reaction. The subjects were required to press a button with their right thumb as soon as they detected a change in the sensory signal. The regional cerebral blood flow (rCBF) was measured quantitatively with O-15-butanol and positron emission tomography (PET) in nine normal male subjects. Cytoarchitectural areas were delimited in 10 post mortem brains by objective and quantitative methods. The images of the post mortem brains subsequently were transformed into standard anatomic format. One PET scanning for each of the sensory modalities was done. The control condition was rest with the subjects having their eyes closed. The rCBF images were anatomically standardized, and clusters of significant changes in rCBF were identified. These were localized to motor areas delimited on a preliminary basis, such as supplementary motor area (SMA), dorsal premotor zone (PMD), rostral cingulate motor area (CMAr),and within areas delimited by using microstructural i.e., cytoarchitectonic criteria, such as areas 4a, 4p, 3a, 3b, and 1. Fields of activation observed as a main effect for all three modalities were located bilaterally in the SMA, CMAr, contralateral PMD, primary motor (M1), and primary somatosensory cortex (SI). The activation in M1 engaged areas 4a and 4p and expanded into area 6. The activation in SI engaged areas 3b, 1, and extended into somatosensory association areas and the supramarginal gyrus posteriorly. We identified significant activations that were specific for each modality in the respective sensory association cortices, though no modality specific regions were found in the motor areas. Fields in the anterior cingulate cortex, rostral to the CMAr, consistently showed significant negative correlationwith mean reaction time (RT) in all three tasks. These results show that simple reaction time tasks activate many subdivisions of the motor cortices. The information from different sensory modalities converge onto the commonstructures: the contralateral areas 4a, 4p, 3b, 1, the PMD, and bilaterally on the SMA and the CMAr. The anterior cingulate cortex might be a key structure which determine the speed of reaction in simple RT tasks.

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Documento generato il 07/04/20 alle ore 22:03:29