TY  - JOUR
PY  - 2000//
TI  - Dose-dependent suppression by ethanol of transient auditory 40-Hz response
JO  - Psychopharmacology
A1  - Jääskeläinen, I. P.
A1  - Hirvonen, J.
A1  - Saher, M.
A1  - Pekkonen, E.
A1  - Sillanaukee, P.
A1  - Naatanen, R.
A1  - Tiitinen, H.
SP  - 132
EP  - 135
VL  - 148
IS  - 2
N2  - RATIONALE: Acute alcohol (ethanol) challenge is known to induce various cognitive disturbances, yet the neural basis of the effect is poorly known. The auditory transient evoked gamma-band (40-Hz) oscillatory responses have been suggested to be associated with various perceptual and cognitive functions in humans; however, alcohol effects on auditory 40-Hz responses have not been investigated to date. OBJECTIVES: The objective of the study was to test the dose-related impact of alcohol on auditory transient evoked 40-Hz responses during a selective-attention task. METHODS: Ten healthy social drinkers ingested, in four separate sessions, 0.00, 0. 25, 0.50, or 0.75 g/kg of 10% (v/v) alcohol solution. The order of the sessions was randomized and a double-blind procedure was employed. During a selective attention task, 300-Hz standard and 330-Hz deviant tones were presented to the left ear, and 1000-Hz standards and 1100-Hz deviants to the right ear of the subjects (P=0. 425 for each standard, P=0.075 for each deviant). The subjects attended to a designated ear, and were to detect the deviants therein while ignoring tones to the other ear. RESULTS: The auditory transient evoked 40-Hz responses elicited by both the attended and unattended standard tones were significantly suppressed by the 0.50 and 0.75 g/kg alcohol doses. CONCLUSIONS: Alcohol suppresses auditory transient evoked 40-Hz oscillations already with moderate blood alcohol concentrations. Given the putative role of gamma-band oscillations in cognition, this finding could be associated with certain alcohol-induced cognitive deficits.<p /> <p>Language: en</p>
LA  - en
SN  - 0033-3158
UR  - http://dx.doi.org/
ID  - ref1
ER  -