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Titolo:
Double-pulse stimulation dissociates intrathalamic and cortical high-frequency (> 400 Hz) SEP components in man
Autore:
Klostermann, F; Funk, T; Vesper, J; Siedenberg, R; Curio, G;
Indirizzi:
Free Univ Berlin, Klinikum Benjamin Franklin, Dept Neurol, Neurophys Grp, D-12200 Berlin, Germany Free Univ Berlin Berlin Germany D-12200 hys Grp, D-12200 Berlin, Germany Free Univ Berlin, Klinikum Benjamin Franklin, Dept Neurosurg, D-12200 Berlin, Germany Free Univ Berlin Berlin Germany D-12200 urosurg, D-12200 Berlin, Germany
Titolo Testata:
NEUROREPORT
fascicolo: 6, volume: 11, anno: 2000,
pagine: 1295 - 1299
SICI:
0959-4965(20000427)11:6<1295:DSDIAC>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOMATOSENSORY-EVOKED-POTENTIALS; 600 HZ; MEDIAN NERVE; NEURONS; CORTEX; SYSTEM; CELLS; OSCILLATIONS; WAVELETS; NUCLEUS;
Keywords:
burst coding; high frequency discharges (600 Hz); low threshold calcium spikes; primary somatosensory cortex; somatosensory evoked potentials; thalamocortical projection;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Klostermann, F Free Univ Berlin, Klinikum Benjamin Franklin, Dept Neurol, Neurophys Grp, Hindenburgdamm 30, D-12200 Berlin, Germany Free Univ Berlin Hindenburgdamm 30 Berlin Germany D-12200
Citazione:
F. Klostermann et al., "Double-pulse stimulation dissociates intrathalamic and cortical high-frequency (> 400 Hz) SEP components in man", NEUROREPORT, 11(6), 2000, pp. 1295-1299

Abstract

Human somatosensory evoked potentials (SEP) contain high-frequency (600 Hz) wavelet bursts possibly reflecting repetitive population spikes in thalamocortical axons and/or postsynaptic responses. To dissociate thalamic and cortical burst components the recovery of intrathalamic SEP (derived from electrodes implanted for movement disorder therapy in seven patients) was compared with scalp SEP in six age-matched Parkinsonian patients and six healthy younger subjects. Upon electric median nerve double-pulse stimulation conditioned scalp bursts were found attenuated in both groups, more for 10 msthan 20 ms interstimulus intervals; moreover, intraburst frequencies decreased from 690 Hz to 590 Hz. By contrast, intrathalamic burst amplitudes andfrequencies (around 1 kHz) remained largely stable. These dissociations indicate functionally distinct generator mechanisms for scalp and intrathalamic high-frequency SEP bursts. NeuroReport 11:1295-1299 (C) 2000 Lippincott Williams & Wilkins.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 02:51:37