scholarly journals Effect of Sudarsankriya yoga practices on P300 amplitude and latency

2021 ◽  
Vol 25 (1) ◽  
Author(s):  
Ashwini PR Gholam ◽  
Rajesh Ranjan ◽  
Jayashree S Bhat
Keyword(s):  
P300 Amplitude

P300 Amplitude and Topography in an Autobiographical Oddball Paradigm Involving Simulated Amnesia

2002 ◽  
Vol 16 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Antoinette R. Miller ◽  
J. Peter Rosenfeld ◽  
Matthew Soskins ◽  
Marianne Jhee
Keyword(s):  
Task Difficulty ◽  
Event Related Potential ◽  
P300 Amplitude ◽  
Oddball Paradigm ◽  
Amplitude Difference ◽  
P300 Component ◽  
Oddball Task

Abstract The P300 component of the event-related potential was recorded during two blocks of an autobiographical oddball task. All participants performed honestly during the first block (Phone), i.e., the oddball stimuli were phone numbers. During the second block (Birthday), in which the oddball stimuli were participants' birthdays, a Truth group (N = 13) performed honestly and a Malinger group (N = 14) simulated amnesia. Amnesia simulation significantly reduced P300 amplitudes, both between groups and within the Malinger group (Phone vs. Birthday), possibly because of an increase in task difficulty in the Malinger condition. Analysis of scaled amplitudes also indicated a trend for a feigning-related alteration in P300 topography. Bootstrapping of peak-to-peak amplitudes detected significantly more (93%) Malinger individuals than bootstrapping of baseline-to-peak amplitudes (64%). Bootstrapping also provided evidence of a feigning-related amplitude difference between oddball stimuli (i.e., Phone > Birthday) in 71% of Malinger group individuals. In this comparison, the peak-to-peak measure also performed significantly better in intraindividual diagnostics.

Response-Specific Scalp Distributions in Deception Detection and ERP Correlates of Psychopathic Personality Traits

2004 ◽  
Vol 18 (1) ◽  
pp. 13-26 ◽  
Author(s):  
Antoinette R. Miller ◽  
J. Peter Rosenfeld
Keyword(s):  
Deception Detection ◽  
Event Related Potential ◽  
Psychopathic Personality ◽  
P300 Amplitude ◽  
Group Differences ◽  
Post Hoc Analysis ◽  
P300 Component ◽  
Psychopathic Personality Inventory ◽  
Post Hoc ◽  
First Time

Abstract University students were screened using items from the Psychopathic Personality Inventory and divided into high (n = 13) and low (n = 11) Psychopathic Personality Trait (PPT) groups. The P300 component of the event-related potential (ERP) was recorded as each group completed a two-block autobiographical oddball task, responding honestly during the first (Phone) block, in which oddball items were participants' home phone numbers, and then feigning amnesia in response to approximately 50% of items in the second (Birthday) block in which oddball items were participants' birthdates. Bootstrapping of peak-to-peak amplitudes correctly identified 100% of low PPT and 92% of high PPT participants as having intact recognition. Both groups demonstrated malingering-related P300 amplitude reduction. For the first time, P300 amplitude and topography differences were observed between honest and deceptive responses to Birthday items. No main between-group P300 effects resulted. Post-hoc analysis revealed between-group differences in a frontally located post-P300 component. Honest responses were associated with late frontal amplitudes larger than deceptive responses at frontal sites in the low PPT group only.

P300 amplitude attenuation in high risk and early onset psychosis youth

2019 ◽  
Vol 210 ◽  
pp. 228-238 ◽  
Author(s):  
Kelsey Graber ◽  
Michelle Bosquet Enlow ◽  
Frank H. Duffy ◽  
Eugene D'Angelo ◽  
Georgios Sideridis ◽  
...  
Keyword(s):  
High Risk ◽  
Early Onset ◽  
P300 Amplitude ◽  
Amplitude Attenuation ◽  
Early Onset Psychosis

No Decrement in Visual P300 Amplitude During Extended Performance of the Oddball Task

1986 ◽  
Vol 29 (3-4) ◽  
pp. 199-204 ◽  
Author(s):  
Walter S. Pritchard ◽  
Michael E. Brandt ◽  
Scott A. Shappell ◽  
Thomas J. O'dell ◽  
Ernest S. Barratt
Keyword(s):  
P300 Amplitude ◽  
Oddball Task ◽  
Visual P300

Electrophysiological correlates of categorization: P300 amplitude as index of target similarity

2006 ◽  
Vol 71 (3) ◽  
pp. 278-288 ◽  
Author(s):  
A. Azizian ◽  
A.L. Freitas ◽  
T.D. Watson ◽  
N.K. Squires
Keyword(s):  
P300 Amplitude

scholarly journals The evaluation of Hashimoto's thyroiditis with event-related potentials and magnetic resonance spectroscopy and its relation to cognitive function

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Marta Waliszewska-Prosół ◽  
Joanna Bladowska ◽  
Sławomir Budrewicz ◽  
Marek Sąsiadek ◽  
Edyta Dziadkowiak ◽  
...  
Keyword(s):  
Cognitive Function ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Hashimoto’S Thyroiditis ◽  
Event Related Potentials ◽  
Brain Dysfunction ◽  
P300 Amplitude ◽  
Hashimoto's Thyroiditis ◽  
Resonance Spectroscopy ◽  
Related Potentials

AbstractThyroid dysfunction is very often accompanied by cognitive and affective disorders. The frequency of these disorders in patients with compensated Hashimoto’s thyroiditis (HT) is unknown. The aim of the present study was to evaluate brain dysfunction in euthyroid HT patients by means of event-related potentials (ERP) and magnetic resonance spectroscopy (MRS) and to correlate it with cognitive function. 68 patients with HT (59 female, 9 male) and 45 healthy controls were included in the study. All the patients underwent ERP including an analysis of N200 and P300 response parameters. MRS voxels were located in the posterior cingulate gyrus (PCG) and the left parietal white matter (PWM). The NAA/Cr, mI/Cr, and Cho/Cr ratios were analysed. The ERP parameters, MRS metabolite ratios and hormonal concentrations (TSH, fT3, fT4) as well as TGAb and TPOAb titer were also correlated. There was a significant prolongation of the latencies of N200 and P300 potentials and a significant decrease of P300 amplitude in HT patients than in the control group. There was a significant positive correlation between the mI/Cr ratio in the PCG area and P300 latencies. NAA/Cr ratio in the PCG region showed significant negative correlations with all N200 latencies. The results may suggest brain dysfunction in neurologically asymptomatic HT patients. ERPs undergo significant changes in patients with HT and may, in combination with MRS, constitute an important element in the recognition and monitoring of cognitive functions in this group of patients.

Availability of dopamine transporters and auditory P300 abnormalities in adults with attention-deficit hyperactivity disorder: preliminary results

CNS Spectrums ◽  
2017 ◽  
Vol 23 (4) ◽  
pp. 264-270 ◽  
Author(s):  
Ching-Lin Chu ◽  
I Hui Lee ◽  
Mei Hung Chi ◽  
Kao Chin Chen ◽  
Po See Chen ◽  
...  
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Attention Deficit ◽  
Photon Emission ◽  
Event Related Potentials ◽  
P300 Amplitude ◽  
Emission Computed Tomography ◽  
Adhd Group ◽  
Hyperactivity Disorder ◽  
Auditory P300 ◽  
Related Potentials

ObjectivePrevious studies have indicated that there is dopamine transporter (DAT) dysregulation and P300 abnormality in adults with attention-deficit hyperactivity disorder (ADHD); however, the correlations among the three have not been fully explored.MethodsA total of 11 adults (9 males and 2 females) with ADHD and 11 age-, sex-, and education-level-matched controls were recruited. We explored differences in DAT availability using single-photon emission computed tomography and P300 wave of event-related potentials between the two groups. The correlation between DAT availability and P300 performance was also examined.ResultsDAT availability in the basal ganglia, caudate nucleus, and putamen was significantly lower in the ADHD group. Adults with ADHD had lower auditory P300 amplitudes at the Pz and Cz sites, as well as longer Fz latency than controls. DAT availability was negatively correlated to P300 latency at Pz and Fz.ConclusionsAdults with ADHD had both abnormal DAT availability and P300 amplitude, suggesting that ADHD is linked to dysfunction of the central dopaminergic system and poor cognitive processes related to response selection and execution.

Auditory P300 as a Neurophysiological Correlate of Symptomatic Improvement by Transcranial Direct Current Stimulation in Patients With Schizophrenia: A Pilot Study

2018 ◽  
Vol 51 (4) ◽  
pp. 252-258
Author(s):  
Minah Kim ◽  
Tak Hyung Lee ◽  
Wu Jeong Hwang ◽  
Tae Young Lee ◽  
Jun Soo Kwon
Keyword(s):  
Pilot Study ◽  
Direct Current ◽  
Transcranial Direct Current Stimulation ◽  
Negative Symptoms ◽  
Symptomatic Improvement ◽  
P300 Amplitude ◽  
Direct Current Stimulation ◽  
Auditory P300 ◽  
Related Potentials ◽  
Positive And Negative Symptoms

Background. The reduced amplitude, prolonged latency, and increased intertrial variability of auditory P300 have been consistently reported in relation to the symptomatic severity of schizophrenia. This study investigated whether auditory P300 event-related potentials can be used as an objective indicator of symptomatic improvement by transcranial direct current stimulation (tDCS) in patients with schizophrenia. Methods. Ten patients with schizophrenia received 20 minutes of 2-mA tDCS twice a day for 5 consecutive weekdays. The anode was placed over the left dorsolateral prefrontal cortex, and the cathode was placed over the left temporo-parietal cortex. The Positive and Negative Syndrome Scale (PANSS) and the auditory P300 were measured for each participant at baseline and after the completion of the tDCS applications. Results. The participants showed significant improvement in the positive and negative symptoms as indexed by change in the PANSS scores by the tDCS. The P300 amplitude, latency, and intertrial variability did not statistically significantly differ after the tDCS application. However, a significant association was observed between the reduced P300 intertrial variability and improvement in the positive symptoms by tDCS. In addition, the changes in both the P300 latency and intertrial variability were significantly correlated with reduced negative symptoms after the tDCS application. Conclusions. Although this pilot study is limited by the small sample size and lack of a sham control, the results suggest that auditory P300 may be a putative marker reflecting the effect of tDCS on the positive and negative symptoms of schizophrenia.

scholarly journals P300 and Decision Making under Risk and Ambiguity

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Lei Wang ◽  
Jiehui Zheng ◽  
Shenwei Huang ◽  
Haoye Sun
Keyword(s):  
Decision Making ◽  
Early Stage ◽  
Event Related Potentials ◽  
Underlying Mechanism ◽  
P300 Amplitude ◽  
Early Assessment ◽  
Decision Making Under Risk ◽  
Related Potentials ◽  
The Difference ◽  
Ambiguous Condition

Our study aims to contrast the neural temporal features of early stage of decision making in the context of risk and ambiguity. In monetary gambles under ambiguous or risky conditions, 12 participants were asked to make a decision to bet or not, with the event-related potentials (ERPs) recorded meantime. The proportion of choosing to bet in ambiguous condition was significantly lower than that in risky condition. An ERP component identified as P300 was found. The P300 amplitude elicited in risky condition was significantly larger than that in ambiguous condition. The lower bet rate in ambiguous condition and the smaller P300 amplitude elicited by ambiguous stimuli revealed that people showed much more aversion in the ambiguous condition than in the risky condition. The ERP results may suggest that decision making under ambiguity occupies higher working memory and recalls more past experience while decision making under risk mainly mobilizes attentional resources to calculate current information. These findings extended the current understanding of underlying mechanism for early assessment stage of decision making and explored the difference between the decision making under risk and ambiguity.

Sign in / Sign up

Export Citation Format

Share Document