Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Cerebral activation during a simple force production task: changes in the time course of the haemodynamic response
Autore:
Peck, KK; Sunderland, A; Peters, AM; Butterworth, S; Clark, P; Gowland, PA;
Indirizzi:
Univ Nottingham, Sch Phys & Astron, Magnet Resonance Ctr, Nottingham NG7 2RD, England Univ Nottingham Nottingham England NG7 2RD , Nottingham NG7 2RD, England Univ Nottingham, Div Stroke Med, Nottingham NG7 2RD, England Univ Nottingham Nottingham England NG7 2RD , Nottingham NG7 2RD, England
Titolo Testata:
NEUROREPORT
fascicolo: 13, volume: 12, anno: 2001,
pagine: 2813 - 2816
SICI:
0959-4965(20010917)12:13<2813:CADASF>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRESUPPLEMENTARY MOTOR AREA; FUNCTIONAL MRI; SENSORIMOTOR CORTEX; FMRI; ARM;
Keywords:
event-related; fMRI; force output; haemodynamic response; inhibition; motor control;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Gowland, PA Univ Nottingham, Sch Phys & Astron, Magnet Resonance Ctr, UnivPk, Nottingham NG7 2RD, England Univ Nottingham Univ Pk Nottingham England NG7 2RD D, England
Citazione:
K.K. Peck et al., "Cerebral activation during a simple force production task: changes in the time course of the haemodynamic response", NEUROREPORT, 12(13), 2001, pp. 2813-2816

Abstract

An event-related paradigm was used to investigate the fMRI signal from theprimary motor cortex (MI) and the supplementary motor area (SMA) during isolated isometric wrist extension at five different force levels. There was only a weak trend towards increased area of activation with increased forceoutput, but there was a force-related increase in percentage change of signal within voxels in MI (Kendall Tc=0.48, p<0.01), which may indicate control of force output by variation of neural firing rate. In SMA there was a correlation between peak force output and time-to-peak of the haemodynamic response in SMA (Kendall Tc=0.74, p<0.0001). This unexpected finding of a task-related change in the shape of the haemodynamic response within a singlebrain area requires further investigation. It may indicate a slower rise time at lower perfusion rates, or may be the result of inhibitory processes in motor control.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 17:57:54