International Journal of Medical Toxicology & Legal Medicine
  • Year: 2019
  • Volume: 22
  • Issue: 3and4

Brain fingerprinting using P300 in the detection of concealed information

  • Author:
  • Nermin Nabil Fayed Fayed1,, Sherien Salah El Din Mohamed Ghaleb1,6,7, Abla Abd El Rahman Ali3, Alaa Mohamed Shehab4, Amira Mohamed El Gohary5
  • Total Page Count: 11
  • Page Number: 149 to 159

1Ph. D. Forensic Medicine and Clinical Toxicology Faculty of medicine, Cairo University

3Ph. D. Forensic Medicine and Clinical Toxicology Faculty of medicine, Cairo University

4Ph. D. Forensic Medicine and Clinical Toxicology Faculty of medicine, Cairo University

5Ph. D. Clinical Neurophysiology Faculty of medicine, Cairo University

6Head of the Cultural Committee Faculty of Medicine, Cairo University, Egypt

7Head of Forensic Medicine and Toxicology department, Faculty of Medicine, Beni-Sueif University, Egypt

*Corresponding Author Dr Nermin Nabil Fayed Fayed Full Address: 6th Rizk Yusuf Street, Haram, Giza,. Egypt. Tel; +201224862364, Email: drnerminnabil@gmail.com

Online published on 1 May, 2020.

Abstract

Brain fingerprinting procedure is a unique forensic technique that can detect particular concealed information stored in the brain by electroencephalography (EEG). P300 wave is considered as an event-related potential (ERP) part which response is observed when a person is subjected to a rare stimulus. The memory centres of the brain are stimulated within 300–1000 m/sec after the stimulus is elicited. This technology can be a useful technique for effective identification of criminals in courts.

This work aimed to evaluate the amplitude and latency of P300 wave in response to relevant visual stimuli and its absence in response to irrelevant ones.

This is a cross-sectional prospective study conducted on two hundred twenty five normal subjects at the Clinical Neurophysiology Unit, Faculty of Medicine, Cairo University Hospitals. P300 wave was evoked by a known stimulus. The device used to record the responses was a Nihon Kohden-Neuropak MEB-9200 G/K EP/EMG 4-channel system (Neuropak M1) version 08.11 (Japan).

Photos of known persons or places elicited a P300 response, while photos of unknown persons or places didn't. As P300 wave appeared in response to a known stimulus only, we recorded its amplitude and latency and evaluated its associations with different variables such as age, sex, residence, education, and occupation.

P300 wave can be useful in detecting hidden information stored in the brain and can be considered as an objective and reliable test.

Keywords

Brain Fingerprinting, P300 wave, Electroencephalography (EEG), concealed information, Event-related potentials (ERP)