A variety of physiological signals can be recorded during biofeedback experiments using PowerLab data acquisition systems and LabChart software.
"Biofeedback" refers to the use of instrumentation to provide subjects with information about physiological processes of which they are otherwise unaware (i.e. heartbeats, brain waves). External cues (i.e. visual or auditory feedback) then permit the user to voluntarily manipulate these processes. Students can use PowerLab and suitable signal conditioners to record a range of physiological signals including EEG, EMG and ECG. Galvanic Skin Response (GSR) may be monitored using the GSR Finger Electrodes and the GSR Amp. A stress and biofeedback student experiment (measuring GSR and heart rate) is available from the Experiments section. Students may also obtain online auditory feedback using the Auditory Feedback Extension (Chart 4 on the Macintosh) and Headphones. A particularly useful feature of the LabChart software is the DVM display that allows the user to view data numerically in a fully adjustable, floating window. Other physiological parameters may be recorded for biofeedback experiments in undergraduate teaching laboratories. Non-invasive blood pressure recordings may be obtained using the Sphygmomanometer. Respiratory function is monitored with Piezo Respiratory Belt Transducers and/or the Spirometer Kit for use with Respiratory Flow Heads and the Spirometer Pod. For basic biofeedback experiments, the Psychophysiology Teaching System provides a range of suitable sensors and amplifiers, whilst the Advanced Teaching System provides a more comprehensive range of equipment. |