Physiology and Neurobiology       home >>

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EMAIL:
cdrewes@iastate.edu PH:(515) 294-8061 WEB:http://www.eeob.iastate.edu/faculty/DrewesC/htdocs/
MAIL: C. Drewes, EEOB Dept, Rm 503 Sci II Building, Iowa State University, Ames, IA 50011 USA

Giant Algal Cells [A simple, low-tech lab exercise that uses giant algal cells, Nitella, to study cytoplasmic streaming, streaming velocity, and arrest of streaming in response to an electrical stimulus. Background info and references included. Presented at NABT-'98; 9 pp.][Streaming animation]

Models and Mindsets for Teaching Neurophysiology [A booklet on concepts and common misconceptions about neuron anatomy& function. Ideas for hands-on models to show size/scale of nerve cell parts and movement of gated channel proteins for electrical signaling in nerve cell membranes.]
Electromyography: Recording Electrical Signals from Human Muscle [Student lab uses biofeedback to control electrical activity patterns from single motor units in calf muscle during voluntary activation. Measure timing of involuntary reflex responses to tendon tap and more. 9 pp.]
The Human Electrocardiogram [A student lab exercise using a portable, stand-alone electrical electrophysiological recording system for electrocardiogram recording and analysis. 9 pp.]
Schematics and Technical Details: Neurophysiological Applications [Parts lists, commercial sources, and circuit diagrams for building inexpensive, versatile electrophysiological instruments: differential recording amplifiers and battery-operated power supplies, filters, etc. Amplifiers are used for student labs on EKG, EMG, and many other extracellular recordings. Includes information on oscilloscope sources/specifications.]
Human Vocalization [A novel lab exercise. Students measure vibration frequencies from the human larynx during vocalization (speech and singing scale notes). Piezoelectric disks detect laryngeal vibrations. Analysis of waves is done on an oscilloscope, or other display device.]
Touch and Temperature Senses [Student lab exercise for determining two-point touch threshold, tactile localization, and mapping of cold and warm receptive fields in human skin. Uses new, inexpensive materials for quantifying thermosensory receptive fields; 11 pp.]
Biological Smoke Detectors (PDF file) [A mini-manual for students and teachers. Gives background information and ideas for using invertebrates (e.g., Lumbriculus and earthworms) for behavioral toxicity testing. Designed as a guide to student research or science fair projects; 14 pp.]
Non-invasive Recording of Giant Nerve Fiber Action Potentials from Freely Moving Oligochaetes [Detailed student lab exercise on recording of all-or-none action potentials from intact Lumbriculus variegatus; Proc. Assoc. Biol. Lab. Educ. ABLE 1998; 17 pp. wormAP-1; wormAP-2]
[Oligochaete Giant Axons - Short PowerPt presentation] [Cross-sections]