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ISSN 2992-779X (Electronic)
ISSN 2007-6452 (Print)

2015, Number 1

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Investigación en Discapacidad 2015; 4 (1)

Lateral cortical oscillations before and during photostimulation of a patient from four years after severe traumatic brain injury compared with those of a control group

Brust-Carmona H, Galicia AM, Mascher GD, Sánchez-Quezada A, Alfaro-Belmont J, Flores ÁB, Yáńez SO

Language: Spanish
References: 37
Page: 22-37
PDF size: 1490.83 Kb.


ABSTRACT

Introduction: Human behavior depends on electrical brain oscillations. Absolute power (AP), sensory-motor responses and the capability to habituate, decrease in patients who have acquired brain damage. Methods: Five serial QEEG (Quantitative Electroencepalogram) through a 7.5 month-span were performed in a patient who had a gunshot 4 years before, at the left orbit, trespassing frontal, parietal and temporal lobes. Sequential QEEG were recorded under closing eyes with 20 series of photo-stimulation (FR). Recordings were done on AP average (APA) for every pre-stimulation (Pre) and for every RPh period in four wide-band frequencies. AP distribution was evaluated by linear regression and its statistical significance is discussed. Results were matched to a 10 young adults control group (CG) aged in average 22.4 years (± SD 4.1 years). Results: APAs on delta and theta were bigger in patient’s left hemisphere (LH) than in right hemisphere (RH) and than in CG. Alpha APAs were higher in patient’s RH than in LH, but lower than in CG. No changes were observed during the first RPh, however an ascending slope occurred in late recordings, similar to that of CG. The beta AP resulted on a lower ascending slope than in CG. Discussion: Changes described for the four frequencies in late QEEG suggest functional reorganization on brain circuits, clinically observed by neuropsychological and habituation improvement.


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