ERP is checking the brain's response to stimuli in less than a second and provides the possibility to assess the brain function in patients with cognitive impairment. In this way, by giving a proper stimulation (visual, auditory,  cognitive and ....) To the individual, the brain signals (EEG) due of perception stimulates is recorded. That is, in a test ERP , brain activity  record during a visual or auditory task. The brain activity recorded through a cap that is placed on the person's head . So ERP caused by three types overall stimulation: visual stimulation, auditory and movement.

ERP provides a record of milliseconds of neural information processing that is associated with certain operations, such as sensory coding, response inhibition and working memory updating.

Because these signals are used to diagnose brain disorders, how to generate event-related potentials (ERP) in an EEG signal and analysis is very important. ERP is usually defined as the simultaneous activity of several groups of neurons at one point in time and form a range of responses, which are extracted by the "event" such as a reaction to a provocation "aim" or detect the absence of a provocation in a sequence.

The most common method of extracting ERP, use patterns that two entirely different stimuli Placed in a sequence randomly. One of these drivers (Standard stimuli) that appear more frequently, other stimuli intended as the target stimulus and appear far less and for the unforeseen. Standard and target stimuli can be either sounds at different frequencies, shapes with different colors (checker plates) and so on. typically, participants will be asked to count the number of  target stimuli in a sequence, or with every appearance of a stimulus, press the button.

ERP features

- Having a high time resolution in milliseconds

- Non-invasive technique that uses EEG and such other methods are not exposed to radiation.

- Laboratory are flexible.

- Lower cost than other methods.

- Study theories of neuroscience about how cognitive functions - behavior in healthy subjects.

- Measuring real-time processing of stimuli, even when there is no response

- A useful tool for examining the interaction between cognition and emotion

- Diagnosis and Pathology of Neurological Disorders -Psychic Including depression, anxiety and mood disorders, hyperactivity, autism, learning disorders, Alzheimer's disease, movement disorders, cerebral palsy and esc.

Cases and Applications

  • Dependent on alcohol syndrome
  • Schizophrenia
  • Depression
  • Bipolar disorder
  • Phobia (Phobia)
  • Panic • generalized anxiety disorder (GAD)
  • action \ obsessive-compulsive disorder (OCD)
  • Post-Traumatic Stress Disorder (PTSD)
  • Dissociative disorders
  • Personality disorder
  • Dementia
  • Parkinson
  • Multiple sclerosis (MS)
  • Stroke
  • Damage in the brain