Electroencephalographic changes during selective attention

Changes in otoacoustic emissions during selective auditory and visual attention.

Previous studies have demonstrated that the otoacoustic emissions (OAEs) measured during behavioral tasks can have different magnitudes when subjects are attending selectively or not attending. The implication is that the cognitive and perceptual demands of a task can affect the first neural stage of auditory processing-the sensory receptors themselves. However, the directions of the reported a...

Electroencephalographic approximate entropy changes in healthy volunteers during remifentanil infusion.

BACKGROUND The aim of this study was to investigate the independent effect of remifentanil on the approximate entropy (ApEn) in frontoparietal montages. The authors investigated which montages were relevant to assess the remifentanil effect on the electroencephalogram. Spectral edge frequency and the canonical univariate parameter were used as comparators. METHODS Twenty-eight healthy volunte...

Electroencephalographic changes during piano playing and related mental tasks.

Theta activity in EEG was found to be augmented in the frontal midline area in 5 young women while they played classical piano pieces and during related mental tasks. This activity was considered to be a frontal midline theta rhythm with the maximal amplitude mostly in Fz and of the frequency ranging from 5 to 7.5 Hz. This theta activity was observed to increase depending on the degree of the s...

Electrocardiographic Changes During Selective Coronary Cineangiography

S ELECTIVE coronary angiography is being used with increasing frequency for clinical diagnosis in several forms of heart disease. Except for the works of Ross,' Hale and Jefferson,2 and Lehman and associates,3 there have been no detailed reports in the literature about the electrocardiographic changes accompanying the injection of radiopaque media selectively into the coronary arteries of man. ...

Electrocardiographic changes during selective coronary angiography.