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Titolo:
Rapid recovery (20 ms) of human 600 Hz electroencephalographic wavelets after double stimulation of sensory nerves
Autore:
Mackert, BM; Weisenbach, S; Nolte, G; Curie, G;
Indirizzi:
Free Univ Berlin, Klinikum Benjamin Franklin, Dept Neurol, Neurophys Grp, D-12203 Berlin, Germany Free Univ Berlin Berlin Germany D-12203 hys Grp, D-12203 Berlin, Germany
Titolo Testata:
NEUROSCIENCE LETTERS
fascicolo: 2, volume: 286, anno: 2000,
pagine: 83 - 86
SICI:
0304-3940(20000602)286:2<83:RR(MOH>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOMATOSENSORY-EVOKED POTENTIALS; MEDIAN NERVE; INHIBITORY INTERNEURONS; CORTEX; OSCILLATIONS; SEP; RECORDINGS; NEURONS; SYSTEM; CELLS;
Keywords:
somatosensory evoked potentials; median nerve; radial nerve; high frequency activity (600 Hz); double pulse stimulation; recovery behavior; primary somatosensory cortex;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
21
Recensione:
Indirizzi per estratti:
Indirizzo: Mackert, BM Free Univ Berlin, Klinikum Benjamin Franklin, Dept Neurol, Neurophys Grp, D-12203 Berlin, Germany Free Univ Berlin Berlin Germany D-12203 2203 Berlin, Germany
Citazione:
B.M. Mackert et al., "Rapid recovery (20 ms) of human 600 Hz electroencephalographic wavelets after double stimulation of sensory nerves", NEUROSCI L, 286(2), 2000, pp. 83-86

Abstract

Non-invasive scalp-recordings of human somatosensory evoked potentials (SEP) contain high-frequency (600 Hz) wavelet bursts, presumably generated by synchronized thalamocortical and/or intracortical population spikes. Here, double pulse stimulation (interval 20 ms) in 12 healthy subjects revealed significantly different burst recovery for mixed vs. sensory-only nerves. For median nerves the second burst response was decreased (11/11 subjects), possibly due-to interfering reafferent (e.g. muscle spindle) input. In contrast, for sensory-only superficial radial nerves (containing less fibers than median nerves), weak bursts were detected in 6/11 subjects and were foundfully recovered in 4/6 subjects. This potential for rapid burst recovery at 20 ms intervals renders contributions from neurons emitting bursts based on slowly recovering low-threshold calcium spikes unlikely and favors the generation of macroscopic SEP bursts by specialized cell populations, e.g. inhibitory interneurons and/or chattering cells the latter of which are capable to discharge rapidly repeating (50 Hz) high-frequency (600 Hz) bursts of fast sodium spikes. (C) 2000 Elsevier Science Ireland Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/04/20 alle ore 12:02:44