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Titolo:
Persistence of vibrissal motor representation following vibrissal pad deafferentation in adult rats
Autore:
Franchi, G;
Indirizzi:
Univ Ferrara, Sezione Fisiol Umana, Dipartimento Sci Biomed & Terapie Avanzate, I-44100 Ferrara, Italy Univ Ferrara Ferrara Italy I-44100 apie Avanzate, I-44100 Ferrara, Italy
Titolo Testata:
EXPERIMENTAL BRAIN RESEARCH
fascicolo: 2, volume: 137, anno: 2001,
pagine: 180 - 189
SICI:
0014-4819(200103)137:2<180:POVMRF>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRIMARY SOMATOSENSORY CORTEX; REORGANIZATION FOLLOWING MOTOR; ABNORMAL TACTILE EXPERIENCE; RECEPTIVE-FIELDS; DYNAMIC ORGANIZATION; NERVE LESIONS; RAPID REORGANIZATION; TARGET MUSCLES; BARREL FIELD; FACIAL-NERVE;
Keywords:
motor cortex; trigeminal deafferentation; cortical reorganization; plasticity;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Franchi, G Univ Ferrara, Sezione Fisiol Umana, Dipartimento Sci Biomed & Terapie Avanzate, I-44100 Ferrara, Italy Univ Ferrara Ferrara Italy I-44100 te, I-44100 Ferrara, Italy
Citazione:
G. Franchi, "Persistence of vibrissal motor representation following vibrissal pad deafferentation in adult rats", EXP BRAIN R, 137(2), 2001, pp. 180-189

Abstract

The effect of sensory vibrissal pad denervation on M1 organization was studied in adult rats 2 weeks after the infraorbital nerve was severed. Cortical motor output organization was assessed mapping the representation size and thresholds of vibrissa movements evoked by intracortical electrical microstimulation (ICMS). Motor cortex output patterns of control and sham groups of rats were compared with those of rats that had received unilateral or bilateral infraorbital nerve lesions. The mean size of the vibrissa representation in both unilateral and bilateral input-deprived hemispheres was notsignificantly different from those in control and sham hemispheres. The mean threshold required to evoke vibrissa movements was significantly higher in both groups of deafferented hemispheres than in control and sham groups of hemispheres. In contrast, the mean threshold required to evoke other types of movements from both groups of input-deprived hemispheres were similarto those found in the control and sham groups of hemispheres. These results indicate that input-deprived vibrissal motor representation reflects lower-than-normal excitability, although the size and topographic relationship with neighboring representations are normal.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/05/20 alle ore 04:21:13