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Titolo:
HUMAN SOMATOSENSORY-EVOKED MAGNETIC-FIELDS TO VIBRATORY STIMULATION OF THE INDEX FINGER - IS THERE FREQUENCY ORGANIZATION IN SI
Autore:
HASHIMOTO I; MASHIKO T; KIMURA T; IMADA T;
Indirizzi:
PSYCHIAT RES INST TOKYO,DEPT PSYCHOPHYSIOL,SETAGAYA KU,2-1-8 KAMIKITAZAWA TOKYO 156 JAPAN NATL INST PHYSIOL SCI,DEPT INTEGRAT PHYSIOL OKAZAKI AICHI 444 JAPAN NIPPON TELEGRAPH & TEL PUBL CORP,BASIC RES LABS,INFORMAT SCI RES LAB ATSUGI KANAGAWA 243 JAPAN TSUKUBA COLL TECHNOL,DEPT ACUPUNCTURE MED TSUKUBA IBARAKI 305 JAPAN
Titolo Testata:
ELECTROMYOGRAPHY AND MOTOR CONTROL-ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY
fascicolo: 5, volume: 109, anno: 1998,
pagine: 454 - 461
SICI:
0924-980X(1998)109:5<454:HSMTVS>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN AUDITORY-CORTEX; SENSORY-MOTOR CORTEX; PSYCHOPHYSICAL MEASUREMENTS; TONOTOPIC ORGANIZATION; MONKEY; NEURONS; SYSTEM; HAND; REORGANIZATION; LOCALIZATION;
Keywords:
SOMATOSENSORY EVOKED MAGNETIC FIELDS; SOMATOSENSORY CORTEX; INDEX FINGER; FREQUENCY ORGANIZATION; FAST-SPIKING INTERNEURONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
I. Hashimoto et al., "HUMAN SOMATOSENSORY-EVOKED MAGNETIC-FIELDS TO VIBRATORY STIMULATION OF THE INDEX FINGER - IS THERE FREQUENCY ORGANIZATION IN SI", ELECTROMYOGRAPHY AND MOTOR CONTROL-ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY, 109(5), 1998, pp. 454-461

Abstract

Objective: Frequency organization in the human somatosensory cortex was studied, Design and methods: Somatosensory evoked magnetic fields (SEFs) from 12 subjects were measured following vibratory stimulation of the index finger by using a 122 channel whole head SQUID system. Sensory stimuli comprising a 40 ms vibration at frequencies of 50, 100, 200 and 400 Hz were delivered to the volar surface of the tip of the right index finger. Using a singled/pole model, the sources of the magnetic fields were estimated and mapped onto magnetic resonance images ofeach subject. The analysis of variance test(ANOVA) was used for statistics. Results: Source localization was determined on the main two peaks (M60 and M110) of the SEFs. All of the sources were located in the area 3b of somatosensory cortex (ST). There were no statistically significant differences between the locations of the dipoles evoked by different frequency stimulations. Conclusions: These results demonstrate the absence of systematic frequency organization at the hand representation area of the SI cortex. We speculate that high frequency vibration above 100 Hz are coded by the fast-spiking interneurons which synapse with Pacinian pyramidal neurons in SI. (C) 1998 Elsevier Science Ireland Ltd. All rights reserved

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Documento generato il 18/01/20 alle ore 07:23:44