Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Identification of the stimulated hemiretina in primary school children andadults based on left and right hemifield pattern reversal visual evoked potentials - a comparative study
Autore:
Hoffmann, K; Leistritz, L; Feucht, M; Benninger, F; Reiter, D; Witte, H;
Indirizzi:
Univ Jena, Inst Med Stat Comp Sci & Documentat, D-6900 Jena, Germany Univ Jena Jena Germany D-6900 omp Sci & Documentat, D-6900 Jena, Germany Univ Vienna, Univ Hosp Neuropsychiat Children, Vienna, Austria Univ Vienna Vienna Austria Hosp Neuropsychiat Children, Vienna, Austria
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 2, volume: 112, anno: 2001,
pagine: 359 - 368
SICI:
1388-2457(200102)112:2<359:IOTSHI>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
AGE-RELATED-CHANGES; CHECK SIZE; LATENCY; COMPONENTS; FIELDS; BRAIN; VEPS; PVEP; MAPS; SEX;
Keywords:
hemifield pattern-reversal visual evoked potentials; instantaneous frequency; neural network;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Hoffmann, K Univ Jena, Inst Med Stat Comp Sci & Documentat, D-6900 Jena, Germany Univ Jena Jena Germany D-6900 cumentat, D-6900 Jena, Germany
Citazione:
K. Hoffmann et al., "Identification of the stimulated hemiretina in primary school children andadults based on left and right hemifield pattern reversal visual evoked potentials - a comparative study", CLIN NEU, 112(2), 2001, pp. 359-368

Abstract

Objectives: The analysis of left and right hemifield pattern-reversal visual evoked potentials (PVEPs) in children and the identification of the stimulated hemiretina testing different identification procedures previously applied to adults. Methods: Lateral hemifield PVEPs were recorded in 40 children (6-11 years)and 27 adults (25-40 years) from, at least, 19 standard electrodes. Two procedures were tested for the determination of the stimulated hemifield: firstly, the evaluation of the values of instantaneous frequency at the occipital electrodes at P100 latency (determined by the global field power). and secondly, the application of a generalized dynamic neural network (GDNN) using the PVEP time course at selected electrode positions as the external input. Results: P100 latency as well as P100 amplitude over the contralateral occiput in children were significantly greater than in adults. Contrary to thebehaviour in adults, instantaneous frequency is not a robust identifier ofleft and right hemiretina stimulation in children. The best identificationperformances were achieved when using group trained GDNNs with the bipolardifference signals of electrodes P3/P4 or T5/T6 as the external input. Conclusions: The PVEPs at electrodes P3/P4 and T5/T6 contain essential information for the determination of the stimulated hemifield. This should be further considered during the development of on-line procedures for automatic PVEP detection in future studies. (C) 2001 Elsevier science ireland Ltd. Ail rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/07/18 alle ore 13:36:38