TY - JOUR
T1 - EEG-Driven Photic Stimulation Effect on Plasma Cortisol and β-Endorphin
AU - Kumano, Hiroaki
AU - Horie, Harumi
AU - Kuboki, Tomifusa
AU - Suematsu, Hiroyuki
AU - Sato, Hiroshi
AU - Yasushi, Mitsuo
AU - Kamei, Tsutomu
AU - Masumura, Sumio
PY - 1997
Y1 - 1997
N2 - The effect of EEG-driven photic stimulation on stress-related endocrine function was studied. Subjects were 16 healthy males divided into a photic stimulation group (n=8) and a control group (n=8). Electrodermal and emotional lability measures were assessed by nonspecific skin conductance response and the Maudsley Personality Inventory, respectively. Plasma cortisol and β-endorphin concentrations were measured both before and after EEG-driven photic stimulation as well as the resting condition. Subjects with electrodermal, emotional, or both lability showed comparable decreases of plasma β-endorphin on photic stimulation as did the stable subjects. Under resting control conditions, however, they showed significant increases of β-endorphin compared to both stable subjects as well as the photic stimulation condition. In addition, labile subjects showed significant alpha enhancement on photic stimulation compared to stable subjects and to the resting control condition. The data suggest that increases of plasma β-endorphin in labile control subjects may denote a stress response to the conditions of these experiments, and that any decrease by EEG-driven photic stimulation may indicate a reduction of responsiveness to an acute stress.
AB - The effect of EEG-driven photic stimulation on stress-related endocrine function was studied. Subjects were 16 healthy males divided into a photic stimulation group (n=8) and a control group (n=8). Electrodermal and emotional lability measures were assessed by nonspecific skin conductance response and the Maudsley Personality Inventory, respectively. Plasma cortisol and β-endorphin concentrations were measured both before and after EEG-driven photic stimulation as well as the resting condition. Subjects with electrodermal, emotional, or both lability showed comparable decreases of plasma β-endorphin on photic stimulation as did the stable subjects. Under resting control conditions, however, they showed significant increases of β-endorphin compared to both stable subjects as well as the photic stimulation condition. In addition, labile subjects showed significant alpha enhancement on photic stimulation compared to stable subjects and to the resting control condition. The data suggest that increases of plasma β-endorphin in labile control subjects may denote a stress response to the conditions of these experiments, and that any decrease by EEG-driven photic stimulation may indicate a reduction of responsiveness to an acute stress.
KW - Alpha rhythm
KW - Cortisol
KW - EEG-driven photic stimulation
KW - Stress
KW - β-endorphin
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U2 - 10.1023/A:1026215910176
DO - 10.1023/A:1026215910176
M3 - Article
C2 - 9428969
AN - SCOPUS:0031218197
VL - 22
SP - 193
EP - 208
JO - Biofeedback and Self-Regulation
JF - Biofeedback and Self-Regulation
SN - 1090-0586
IS - 3
ER -