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TEACHING IN THE LABORATORY

COMPELLING CLASSROOM DEMONSTRATIONS THAT LINK VISUAL SYSTEM ANATOMY, PHYSIOLOGY, AND BEHAVIOUR

¹ Department of Biology, Austin Peay State University, Clarksville, Tennessee 37044 ² Department of Psychology, Austin Peay State University, Clarksville, Tennessee 37044

Abstract

One of our approaches to teaching a course in anatomy and physiology is to stress the fundamental, systems-level concepts. One successful strategy we use is to continually highlight the relationships among anatomy, physiology, and behavior. In this article, we describe a set of classroom demonstrations that stress these links while fostering critical thinking. These demonstrations, on the topic of sensory system structure and function, rely on two perceptual consequences of neural adaptation in the visual system: afterimages and aftereffects. Viewing specific visual stimuli under binocular or monocular conditions with interocular transfer permits several concepts to be observed and discussed, including neural adaptation, anatomical and functional segregation of visual system pathways, and the relationship among visual system structure, function, and perception. This article discusses how to produce and present the required visual stimuli, suggests a set of questions to stimulate critical thinking, and presents student evaluation of this activity.

Key words: visual anatomy; visual physiology; visual aftereffects; classroom demonstration

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