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Titolo:
Rapid functional plasticity of the somatosensory cortex after finger amputation
Autore:
Weiss, T; Miltner, WHR; Huonker, R; Friedel, R; Schmidt, I; Taub, E;
Indirizzi:
Univ Jena, Dept Biol & Clin Psychol, D-07743 Jena, Germany Univ Jena Jena Germany D-07743 iol & Clin Psychol, D-07743 Jena, Germany Univ Jena, Ctr Biomat, D-077401 Jena, Germany Univ Jena Jena Germany D-077401 Jena, Ctr Biomat, D-077401 Jena, Germany Univ Jena, Dept Surg, D-07740 Jena, Germany Univ Jena Jena Germany D-07740 iv Jena, Dept Surg, D-07740 Jena, Germany Univ Alabama, Dept Psychol, Birmingham, AL 35294 USA Univ Alabama Birmingham AL USA 35294 pt Psychol, Birmingham, AL 35294 USA Birmingham Vet Affairs Med Ctr, Phys Med & Rehabil Serv, Birmingham, AL 35233 USA Birmingham Vet Affairs Med Ctr Birmingham AL USA 35233 gham, AL 35233 USA
Titolo Testata:
EXPERIMENTAL BRAIN RESEARCH
fascicolo: 2, volume: 134, anno: 2000,
pagine: 199 - 203
SICI:
0014-4819(200009)134:2<199:RFPOTS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHANTOM-LIMB PAIN; CORTICAL REORGANIZATION; DIGIT DENERVATION; MACAQUE MONKEYS; IMMEDIATE; INJURY; HUMANS; NERVE; MAPS; REPRESENTATION;
Keywords:
phantom limb; cortical reorganization; magnetoencephalography; somatosensory evoked magnetic fields (SEF);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Miltner, WHR Univ Jena, Dept Biol & Clin Psychol, Steiger 3,Haus 1, D-07743 Jena, Germany Univ Jena Steiger 3,Haus 1 Jena Germany D-07743 ena, Germany
Citazione:
T. Weiss et al., "Rapid functional plasticity of the somatosensory cortex after finger amputation", EXP BRAIN R, 134(2), 2000, pp. 199-203

Abstract

Recent research indicates that areas of the primary somatosensory (SI) andprimary motor cortex show massive cortical reorganization after amputationof the upper arm, forearm or fingers. Most of these studies were carried out months or several years after amputation. In the present study, we describe cortical reorganization of areas in the SI of a patient who underwent amputation of the traumatized middle and ring fingers of his right hand 10 days before cortical magnetic source imaging data were obtained. Somatosensory-evoked;ed magnetic fields (SEF) to mechanical stimuli to the finger tipswere recorded and single moving dipoles were calculated using a realistic volume conductor model. Results reveal that the dipoles representing the second and fifth fingers of the affected hand were closer together than the comparable dipoles of the unaffected hand. Our findings demonstrate that neural cell assemblies in SI which formerly represented the right middle and ring fingers of this amputee became reorganized and invaded by neighbouring cell assemblies of the index and little finger of the same hand. These results indicate that functional plasticity occurs within a period of 10 days after amputation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/01/20 alle ore 13:12:01