Brain fingerprinting using P300 in the detection of concealed information Fayed Nermin Nabil Fayed1,,*, Ghaleb Sherien Salah El Din Mohamed1,,6,,7, Ali Abla Abd El Rahman3, Shehab Alaa Mohamed4, Gohary Amira Mohamed El5 1Ph. D. Forensic Medicine and Clinical Toxicology Faculty of medicine, Cairo University 2Ph. D. of Forensic Medicine and Toxicology, Faculty of Medicine, Cairo University, Egypt 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 Background 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. Aim 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. Methods 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). Results 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. Conclusion P300 wave can be useful in detecting hidden information stored in the brain and can be considered as an objective and reliable test. Top Keywords Brain Fingerprinting, P300 wave, Electroencephalography (EEG), concealed information, Event-related potentials (ERP). Top |