Aurice V. Albert

Learn More
Eight verified lesions of the optic chiasm were examined on 0.5 T magnetic resonance (MR) and GE 9800, 8800 computed tomographic (CT) scanners. Enlargement of the optic chiasm was demonstrated in all cases. There was some change of MR signal compared with brain in all but one case, which had no resemblance to contrast enhancement on CT scans. The signal was(More)
Transcranial Doppler sonography (TCD) is a simple method to detect a right-to-left cardiac shunt, although standardized procedures do not exist. In this study 69 patients were tested according to predetermined criteria and procedures (cluster of > 10 microbubbles, duration between injection in the cubital vein and detection in the middle cerebral artery(More)
Over the past few years the composition of our group and the particular problems under investigation have changed appreciably, and yet the general theme of our research has scarcely varied: Our concern remains with systematic description and analysis of the electrical activity of the nervous system in the presence and the absence of con-trollect sensory(More)
A. EVOKED CORTICAL RESPONSES AS A FUNCTION OF "STATE" VARIABLES Electrical responses evoked by sensory stimuli and recorded with gross electrodes placed in different locations of the nervous system have been of great interest to electrophysiologists for many years. The use of implanted electrodes for recording the electrical activity from unanesthetized(More)
Various statistical discrimination indices reveal deflections regarded as significant before the 20th ms after stimulation (probably equivalent to Bickford responses or subcortical activity) and between the 20th and 23rd ms (early fractions of MVER). The independence of signal and noise is discussed. Considerations concerning the calculation of(More)
The succession of amplitudes constituting spontaneous electroencephalographic activity cannot be regarded as a strictly normal distribution. Spontaneous activity and the evoked response are not independent. The signal (evoked response)is, in some cases, non-stationary. The average visual-evoked response comprises several successive temporal fragments of(More)
  • 1