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Titolo:
Functional magnetic resonance imaging of the primary motor cortex in humans: response to increased functional demands
Autore:
Khushu, S; Kumaran, SS; Tripathi, RP; Gupta, A; Jain, PC; Jain, V;
Indirizzi:
Inst Nucl Med & Allied Sci, NMR Res Ctr, Delhi 110054, India Inst Nucl Med& Allied Sci Delhi India 110054 s Ctr, Delhi 110054, India Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India Univ Delhi Delhi India 110007 Dept Phys & Astrophys, Delhi 110007, India Univ Delhi, BR Ambedkar Ctr Biomed Res, Delhi 110007, India Univ Delhi Delhi India 110007 bedkar Ctr Biomed Res, Delhi 110007, India
Titolo Testata:
JOURNAL OF BIOSCIENCES
fascicolo: 2, volume: 26, anno: 2001,
pagine: 205 - 215
SICI:
0250-5991(200106)26:2<205:FMRIOT>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
CEREBRAL BLOOD-FLOW; HUMAN VISUAL-CORTEX; FINGER MOVEMENTS; SIGNAL CHANGES; HUMAN BRAIN; MRI; ACTIVATION; SYSTEM; TASK; STIMULATION;
Keywords:
echo-planar imaging; finger tapping frequency; functional demand; functional magnetic resonance imagine; primary motor cortex;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Khushu, S Inst Nucl Med & Allied Sci, NMR Res Ctr, Lucknow Rd, Delhi 110054, India Inst Nucl Med & Allied Sci Lucknow Rd Delhi India 110054 India
Citazione:
S. Khushu et al., "Functional magnetic resonance imaging of the primary motor cortex in humans: response to increased functional demands", J BIOSCI, 26(2), 2001, pp. 205-215

Abstract

Functional magnetic resonance imaging (fMRI) studies have been performed on 20 right handed volunteers at 1.5 Tesla using echo planar imaging (EPI) protocol. Index finger tapping invoked localized activation in the primary motor area. Consistent and highly reproducible activation in the primary motor area was observed in six different sessions of a volunteer over a periodof one month. Increased tapping rate resulted in increase in the blood oxygenation level dependent (BOLD) signal intensity as well as the volume/areaof activation (pixels) in the contralateral primary motor area up to tapping rate of 120 taps/min 12 Hz), beyond which it saturates. Activation in supplementary motor area was also observed. The obtained results are col related to increased functional demands.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 19:05:06