PSYC 720 Lecture Notes - Lecture 3: Crepuscular, American Woodcock, Evolutionary Arms Race
Document Summary
External stimulus: light waves, sound waves, chemicals, pressure. Sensory neurons collect the information from the above stimuli (transduced into electrical signals) Interpretation of sensory information: hearing a sound, seeing a color, tasting a food, feeling temperature. Be familiar with: cornea, iris (muscles that control pupil size, lens, retina. Lined with rods (dim light receptors) and cones (color: fovea (highest concentration of rod and cones highest acuity) Rods are concentrated in periphery away from fovea. Larger animals tend to be able to detect larger wavelengths, whereas smaller animals and insects tend to be able to detect smaller wavelengths. Birds and insects have a visible spectrum that extends into the uv range. Reflects 130x more light than the human eye. 1: cannot move their eyes must turn their whole head, this may change behavior. Compound eyes (image is perceived as a sum of the parts: large view, detect movement, detect polarization of light.
