PMID- 1413922
OWN - NLM
STAT- MEDLINE
DCOM- 19921123
LR  - 20061115
IS  - 0044-2712 (Print)
IS  - 0044-2712 (Linking)
VI  - 39
IP  - 2
DP  - 1992
TI  - [Changes in spontaneous slow potentials and visually (flash) evoked potentials in 
      response to stimuli with no performance implication].
PG  - 299-316
AB  - The influence of spontaneous slow potential shifts (SPSs) on visual 
      (flash-)evoked potentials (VEPs) was studied. Eighteen subjects received 100 
      flashes. The sequence of interstimulus-intervals (ISIs) was pseudo-randomized. 
      ISI-durations were 3, 5, 7, 9 or 11 seconds. EEG was recorded from Fz, Cz, Pz and 
      Oz with linked-mastoids as reference. EEG was EOG-corrected and VEPs were 
      calculated for preceding positive SPSs. Averaging was done for local SPSs; VEP 
      pairings as well as VEPs were calculated over occipital SPS-polarities. Results 
      showed an influence of SPSs on VEP-amplitudes. Differences in amplitudes were 
      interpreted with the 'activation-correction'-hypothesis and with the 
      'ceiling'-hypothesis. Negative SPSs were followed by smaller negative peaks, and 
      positive SPSs were followed by smaller positive peak-amplitudes. Differences in 
      latencies of N145-P300 peak-to-peak amplitudes after SPSs of different polarity 
      were explained with the threshold-regulation hypothesis. Spectral-analysis were 
      done for SPS-data. There were only poor effects, showing increased parietal alpha 
      2-power after negative SPSs.
FAU - Sammer, G
AU  - Sammer G
AD  - Psychologisches Institut I, Universitat Hamburg.
LA  - ger
PT  - English Abstract
PT  - Journal Article
TT  - Spontane langsame Potentialanderungen (SPSs) und visuell (Blitz-)evozierte 
      Potentiale auf Stimuli ohne Aufgabenbedeutung.
PL  - Germany
TA  - Z Exp Angew Psychol
JT  - Zeitschrift fur experimentelle und angewandte Psychologie
JID - 0433000
SB  - IM
MH  - Adult
MH  - Arousal/*physiology
MH  - Attention/*physiology
MH  - Brain Mapping
MH  - Cerebral Cortex/*physiology
MH  - *Electroencephalography
MH  - Evoked Potentials, Visual/*physiology
MH  - Female
MH  - Humans
MH  - Male
MH  - Photic Stimulation
MH  - Reaction Time/physiology
EDAT- 1992/01/01 00:00
MHDA- 1992/01/01 00:01
CRDT- 1992/01/01 00:00
PHST- 1992/01/01 00:00 [pubmed]
PHST- 1992/01/01 00:01 [medline]
PHST- 1992/01/01 00:00 [entrez]
PST - ppublish
SO  - Z Exp Angew Psychol. 1992;39(2):299-316.