Results 191 to 200 of about 55,117 (228)
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Clinical Neurophysiology, 2012
Attentional deficits have been thought to underlie hemispatial neglect. The present study investigates this using the P300 component of the event-related potential, which is assumed to reflect the allocation of attention.We recorded the P300 and oddball detection performance from patients with neglect. Infrequent targets appeared either in the affected
Saevarsson, Styrmir +3 more
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Attentional deficits have been thought to underlie hemispatial neglect. The present study investigates this using the P300 component of the event-related potential, which is assumed to reflect the allocation of attention.We recorded the P300 and oddball detection performance from patients with neglect. Infrequent targets appeared either in the affected
Saevarsson, Styrmir +3 more
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Biological Psychology, 1991
The P300 (P3) event-related brain potential (ERP) was elicited with auditory stimuli in four different groups of normal, young adult subjects (n = 20 in each group) whose ERPs were obtained at different times of the year. P3 amplitude was largest during spring and summer and smaller for the subjects who were assessed during fall and winter.
J, Polich, M W, Geisler
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The P300 (P3) event-related brain potential (ERP) was elicited with auditory stimuli in four different groups of normal, young adult subjects (n = 20 in each group) whose ERPs were obtained at different times of the year. P3 amplitude was largest during spring and summer and smaller for the subjects who were assessed during fall and winter.
J, Polich, M W, Geisler
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Clinical Neurophysiology, 2000
The effects of instructions to refrain from blinking on the P300 event-related brain potential (ERP) from auditory and visual stimuli were assessed.An oddball paradigm was employed in which young adult subjects (n = 20) silently counted the infrequent target stimuli and were given either no instructions or told "do not blink" in different conditions ...
C J, Ochoa, J, Polich
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The effects of instructions to refrain from blinking on the P300 event-related brain potential (ERP) from auditory and visual stimuli were assessed.An oddball paradigm was employed in which young adult subjects (n = 20) silently counted the infrequent target stimuli and were given either no instructions or told "do not blink" in different conditions ...
C J, Ochoa, J, Polich
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Journal of Neural Engineering, 2011
The Farwell and Donchin matrix speller is well known as one of the highest performing brain-computer interfaces (BCIs) currently available. However, its use of visual stimulation limits its applicability to users with normal eyesight. Alternative BCI spelling systems which rely on non-visual stimulation, e.g.
Belitski, A. +2 more
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The Farwell and Donchin matrix speller is well known as one of the highest performing brain-computer interfaces (BCIs) currently available. However, its use of visual stimulation limits its applicability to users with normal eyesight. Alternative BCI spelling systems which rely on non-visual stimulation, e.g.
Belitski, A. +2 more
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Biological Psychology, 1992
This study demonstrates that operant conditioning may increase the P300 component of the event-related potential above a level obtained without contingent training. An experimental group of subjects was rewarded for producing large P300 amplitudes and was compared with a yoked control group which was rewarded on a random basis.
W, Sommer, S, Schweinberger
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This study demonstrates that operant conditioning may increase the P300 component of the event-related potential above a level obtained without contingent training. An experimental group of subjects was rewarded for producing large P300 amplitudes and was compared with a yoked control group which was rewarded on a random basis.
W, Sommer, S, Schweinberger
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Biological Psychology, 1994
Light therapy in patients with seasonal affective disorder has been reported to enhance visual P300 amplitude. This findings raises the possibility that variations in P300 occur naturally in nonpatients as a function of seasonal variation in sunlight. In the present investigation, P300 was studied in a sample of psychiatrically screened normal subjects
P J, Deldin, C C, Duncan, G A, Miller
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Light therapy in patients with seasonal affective disorder has been reported to enhance visual P300 amplitude. This findings raises the possibility that variations in P300 occur naturally in nonpatients as a function of seasonal variation in sunlight. In the present investigation, P300 was studied in a sample of psychiatrically screened normal subjects
P J, Deldin, C C, Duncan, G A, Miller
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Neuropediatrics, 1993
P300 recordings are valuable and noninvasive neurophysiological research tool to gain further insight into higher cerebral function. Due to methodological and technological restrictions the clinical applicability of these investigations for neuropediatric purposes was limited.
M A, Uberall, U, Brandl, D, Wenzel
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P300 recordings are valuable and noninvasive neurophysiological research tool to gain further insight into higher cerebral function. Due to methodological and technological restrictions the clinical applicability of these investigations for neuropediatric purposes was limited.
M A, Uberall, U, Brandl, D, Wenzel
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Neuropsychologia, 1987
The P300 component was obtained from ten pairs of identical twins and matched control subjects with an auditory discrimination task. The event-related brain potentials (ERPs) from the identical twins were strikingly similar in amplitude and latency compared to control subject pairs. The data suggest that individual variations in ERP waveform morphology
J, Polich, T, Burns
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The P300 component was obtained from ten pairs of identical twins and matched control subjects with an auditory discrimination task. The event-related brain potentials (ERPs) from the identical twins were strikingly similar in amplitude and latency compared to control subject pairs. The data suggest that individual variations in ERP waveform morphology
J, Polich, T, Burns
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Event‐Related Desynchronization and P300
Psychophysiology, 1987ABSTRACTThe information processing demands of frame time, cognitive load, and event rate were examined with respect to the duration and amplitude of the event‐related desynchronization (ERD) and the event‐related potential P300. The central question was: are ERD and P300 cortical indices of the same attentional processes or resources? It was found that
Sergeant, J.A. +2 more
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An improved P300 extraction using ICA-R for P300-BCI speller
2013 35th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2013In this study, a new P300 extraction method is investigated by using a form of constrained independent component analysis (cICA) algorithm called one-unit ICA-with-reference (ICA-R) which extracts the P300 signal based on its temporal information. The main advantage of this method compared to the existing ICA-based method is that the desired P300 ...
Wee Lih, Lee, Tele, Tan, Yee Hong, Leung
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