Abstract
A portable, Internet-based EEG/Auditory Evoked Potential (AEP) monitoring system was developed for remote electrophysiological studies during sleep. The system records EEG/AEP simultaneously at the subject’s home for increased comfort and flexibility. The system provides simultaneous recording and remote viewing of EEG, EMG and EOG waves and allows on-line averaging of auditory evoked potentials. The design allows the recording of all major AEP components (brainstem, middle and late latency EPs) and constituent single sweep EEG epochs. Auditory stimulation is remotely controlled from any internet-connected PC. The developed platform consists of a portable server computer for data acquisition and secured data transmission to the Internet, a web server for temporary storage, and a remote viewing station. During operation, signals are acquired during sleep and transmitted to the secured web server for controlled access viewing. The remote viewer station allows the user to continuously visualize the auditory evoked potentials, modify auditory stimuli at any time and adjust system parameters for its online computation. The developed internet-based EEG/EP system has been tested in a laboratory environment. Preliminary results demonstrate feasibility of remote real-time acquisition and viewing of EEG and EPs and future potential for home monitoring and telemedicine applications.
Highlights
Evoked potentials (EP’s) are electrical signals originated in the brain in response to an external sensory stimulus
The extracted waveform is further decomposed in time into Auditory Brainstem Response (ABR), Middle Latency Response (MLR) and Late Latency Response (LLR) components, each corresponding to a time window of the Auditory Evoked Potential (AEP) response with respect to the stimulus onset
System Overview The portable AEP monitoring system has been developed around a Windows XP laptop computer, a PCMCIA data acquisition card, a bioelectric amplifier system and an Internet web server
Summary
Evoked potentials (EP’s) are electrical signals originated in the brain in response to an external sensory stimulus. The extracted waveform is further decomposed in time into Auditory Brainstem Response (ABR), Middle Latency Response (MLR) and Late Latency Response (LLR) components, each corresponding to a time window of the AEP response with respect to the stimulus onset. Each of these responses has its origin in a specific section of the brain and reveals specific neurological conditions, states and pathologies. Widespread clinical use of EP methodology has made the functional testing of many sensory and motor neural pathways possible in both normal and disease states
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