Czasopismo | ELEKTRONIKA - KONSTRUKCJE, TECHNOLOGIE, ZASTOSOWANIA | Rocznik 2012 - zeszyt 5

Digital signal processing in the diagnosis of brainstem auditory evoked potentials

nr katalogowy: 67418

Examination of evoked potentials (EP) is one of the methods for diagnosing a human brain. This examination allows for monitoring and registering bioelectrical activities of the brain. By using EP one can examine sight and hearing and evaluate responses to different stimuli that activate different parts of the brain. This article is devoted to neurological diagnostics based upon examination of Auditory Evoked Potentials (AEP) [1]. The authors explain what evoked potentials are and how important role they play in hearing examination and discuss the current methods for analysis of its results. The major subject of the article is to describe an alternative way of analyzing the survey results, based on digital signal processing. Moreover, it presents problems associated with acquisition of digital recording of auditory evoked potentials and exemplary waveforms of the potentials corresponding to normal and pathological cases as functions of time and frequency. BEAP All brain activities are closely associated with movements of ions and charge polarization. Electric charges that are moving within the nerve structures can be recorded and received in the form of electric potential. If we stimulate a sensory-sensual receptor, we will automatically receive the response in the form of an electrical signal. Evoked potentials are generated this way. Under the influence of acoustic stimuli in the auditory pathway, the ear, which is a sensory receptor (Fig. 1), produces voltage changes, known as auditory evoked potentials. Evoked potentials are according to response time to stimulation that generates the response. In biomedical terminology, the response time is referred to as latency (in technical nomenclature it would be called a delay). We can classify auditory evoked potentials as short, medium or long latency potentials, according to the reaction time. Taking into account their clinical suitability, only Short Latency Auditory Evoked Pot[...]

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e-Publikacja (format pdf) - nr 67418 "Digital signal processing..." licencja: Osobista Produkt cyfrowy	10.00 zł

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2012-5

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