Sleep Is a Refreshing Process: An fNIRS Study.

Sleep is a very critical process that constitutes up to one third of daytime of a healthy adult. It is known to be an active period where body and brain is refreshed for the next day. It is both part of a larger cycle, i.

Brain asymmetry in directing attention during dichotic listening test: An fNIRS study.

In a classical dichotic listening paradigm, besides auditory brain asymmetry, cognitive functions such as attention and conflict resolution play a major role. The aim of this study is to reveal the possible haemodynamic mechanisms of higher attentional performance in prefrontal cortex during dichotic listening test. Twenty-six healthy participants underwent a dichotic listening task in three sessions; non-forced attention, attention focused to right ear, and attention focused to left ear.

Assessing Olfactory Function in Parkinson's Disease via Entropy Analysis of Chemosensory Event Related Potentials.

The relationship between Parkinson's disease (PD) and olfactory dysfunction has been investigated via psychophysical and electrophysiological assessments. Despite the increasing number of electrophysiological studies focusing on olfactory function, there are still some limitations to observe the chemosensory event-related potentials (CSERP), which are electrophysiological responses of the brain to olfactory and trigeminal stimulations, because of the low sensitivity (low signal-to-noise ratio). Recent studies attempted to establish new techniques to increase the sensitivity for evaluating the CSERP and brain responsiveness.

Brain morphometry and electrophysiological recordings in relation to illness duration in schizophrenia.

Schizophrenia has been recently increasingly linked with a number of structural brain morphological changes which can be associated with functional deficiencies. The aim of this study is to relate electrophysiological changes with structural changes of Heschl's gyrus (HG) volume in schizophrenia. Fifteen schizophrenia patients were compared with control group by magnetic resonance imaging (MRI) volumetry and auditory evoked potentials.

Brain asymmetry measurement using EMISU (embedded interactive stimulation unit) in applied brain biophysics.

The basic motive to study the brain asymmetry using a dichotic paradigm, forced the authors to develop an interactive stimulus system, where not only the stimuli but also the responses could be interactively registered real time on to the EEG data. Therefore, an embedded interactive stimulation unit (EMISU) was constructed and applied in such a task, incorporating behavioral and evoked data from 20 volunteers (10 male, 10 female, 21.15 years).