June 23, 2013
June 23, 2013
June 26, 2013
23.765.1 - 23.765.8
Instrumentation to Facilitate Learning in a First Bio-potentials CourseActive learning is a well-studied approach to promote student understanding and problemsolving. The laboratory component of a course on the engineering aspects of the operation ofnerve and muscle extends this approach by employing an advanced computer assisted dataacquisition system that facilitates the student’s study of electrical signals generated within theirown bodies. In this constructivist environment, interdisciplinary teams of biomedical andelectrical engineering students were tasked to study and explore the dependencies of surfaceelectrical signals generated in muscle bundles or in nerves.The hardware and software laboratory components used were obtained from ADInstruments andconsisted of PowerLab analog and differential voltage sensors with 24-bit resolution, anassortment of electrode pick-up types and sensors, and a web-hosted experiment managementand operations software, LabTutor. The experimental system platforms were utilized by threestudent teams that first explored bread-board generated signals and externally synthesizedsignals. They studied adjustments to the timing and sensitivity and explored the effects of signalfiltering. Following this, teams were asked to explore signals emanating from muscle and theinterdependence of muscle action with the physical configuration of the electrical pick-uphardware. Signals derived from nerve were explored in a similar fashion and compared withthose from muscle. Finally, the groups were asked to propose a physiological signal pick-upmethod and devise an approach to produce a signal that could be used to control an externalcomponent.A variety of assessments were administered both prior to and following laboratory experiences.Students were also surveyed as to their attitudes and perceptions stemming from this activelearning approach in comparison to the lecture based initial content in the course. In particularthe capability of exploring the concepts as groups was assessed. These results are compared withresults from prior course offerings that included no laboratory components.
Hoff, A., & Gilbert, R. (2013, June), Instrumentation to Facilitate Learning in a First Bio-potentials Course Paper presented at 2013 ASEE Annual Conference & Exposition, Atlanta, Georgia. https://peer.asee.org/19779
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