Effects of visual deprivation on the induction of epileptiform activity were studied in layer II/III of mature rat primary visual cortex. Field potentials were evoked by stimulation of layer IV in slices from control and dark-reared (OR) rats. Picrotoxin (PTX)-induced epileptic activity was characterized by spontaneous and evoked epileptic field potentials (EFPs). The results showed that OR s...

OBJECTIVE To compare lateralized cerebral activations elicited during self-initiated movement mirroring and observation of movements. SUBJECTS A total of 15 right-handed healthy subjects, age range 22-56 years. METHODS Functional imaging study comparing movement mirroring with movement observation, in both hands, in an otherwise identical setting. Imaging data were analysed using statistica...

Combining input from multiple senses is essential for successfully mastering many real-world situations. While several studies demonstrate that the presentation of a simultaneous sound can enhance visual detection performance or increase the perceived luminance of a dim light, the origin of these effect remains disputed. The suggestions range from early multisensory integration to changes in re...

Information about the character of the visual evoked response in man during sleep and possible differences between waking and sleep is as yet limited. Vanzulli et a2. (1960) reported that response latencies were increased and “positive waves” augmented. CigLnek ( 1961 ) noted that the early triphasic complex was unchanged except for increased latency while a later wave (“V”) was increased in am...

The relationship between arousal, perception, and visual neglect was examined in this case study. Cold pressor stimulation (CPS: immersing the foot in iced water) was used to manipulate arousal and to determine its effects on contralesional neglect, perception of stimulus intensity (magnitude estimation), reaction time, and an electrophysiological correlate of ascending reticular activating sys...

This work compared the effect of unilateral (right and left) and bilateral vestibular stimulation in a right-brain-damaged patient with neglect. Neglect was improved following left caloric vestibular stimulation, and worsened following right vestibular stimulation. On the other hand, no modification of neglect was observed after bilateral vestibular stimulation. These results support the idea t...