Today : Tuesday, January 22, 2019    فارسی

Electroencephalography/Event Related Potentials (EEG/ERP) Laboratory

ERP Head lab: Shahrzad Mazhari, MD (psychiatrist); PhD

Research manager: Ali Mohammad Pourrahimi; PhD


The KNRC ERP lab was established in 2011 and has continued its activities till now. Event-related brain potentials (ERPs) are a non-invasive method of measuring brain activity during cognitive processing. The transient electric potential shifts (so-called ERP components) are time-locked to the stimulus onset (e.g., the presentation of a word, a sound, or an image). Each component reflects brain activation associated with one or more mental operations. In contrast to behavioral measures such as error rates and response times, ERPs are characterized by simultaneous multi-dimensional online measures of polarity (negative or positive potentials), amplitude, latency, and scalp distribution. Therefore, ERPs can be used to distinguish and identify psychological and neural sub-processes involved in complex cognitive, motor, or perceptual tasks.

We focus on the use of ERPs in several research areas, including:
1) Attention, memory, language, and executive control
2)  Schizophrenia and other psychiatric disorders
3) Multiple Sclerosis



Selected Recent Publications:

1.      Vafaii, P., Mazhari, S., Pourrahimi, AM., Nakhaee, N. Hemispheric differences for visual P3 amplitude in patients with schizophrenia. Neuropsychitry, 2016, 308-313.

2.      Pourrahimi, AM., Mazhari, S., Shabani, M., Tabrizi, YM., Sheibani V. Numerical distance effect in patients with schizophrenia. Neuroscience letters. 2016; 617:1-5.

3.      Mazhari, S., Moghadas Tabrizi, Y., Ghafari-Nejad, A. Neural Evidence for Compromised Mental Imagery in Individuals With Chronic Schizophrenia.  Journal of neuropsychiatry and clinical neurosciences, 2015; 27(2): 127-132.

4.      Pourrahimi AM, Mazhari S, Shabani M, Sheibani V. An evidence for lack of pseudoneglect in patients with schizophrenia: An ERP study. Neuroscience Letters, 2014, 561:96-100.

5.      Mazhari S, Moghadas Tabrizi Y. Abnormalities of mental rotation of hands associated with speed of information processing and executive function in chronic schizophrenic patients. Psychiatry & Clinical Neurosciences, 2014, 68, 410-417.

6.       Tabrizi YM, Mazhari S, Nazari MA, Zangiabadi N, Sheibani V, Azarang S. Compromised motor imagery ability in individuals with multiplesclerosis and mild physical disability: An ERP study. Clinical Neurology and Neurosurgery, 2013و 115 (9): 1738-1744.