Dustin ColeTues/Thurs 3-5Lab 7: Special and Tactile SensesIntroduction:Specialized neurons called sensory receptors are responsible for all of the sensory stimuliyour body processes throughout the day. Basically, they serve to convert various types of energy(sound waves, light, pressure) into physiological signals. Depending on the type of energy adifferent sensory receptor is used, but they are not all independent of one another. For exampleyour body may need to use both photoreceptors and proprioceptors to accurately convert lightinto the visual image you see. Another thing to note about sensory receptors is that depending ontheir location in the body they may be denser and more sensitive.Therefore, our first purposewas to determine how passive and active movement of the eye (opened and closed) effected themovement of an after image. Our second purpose was to determine how different locations onthe body affected the distance at which two calipers are felt.I hypothesized that the afterimage would move with passive movement for both open and closed eyes. Secondly, Ihypothesized that the tongue would be most sensitive to caliper distance followed by thelips, nose, thumb, palm, back of hand, then finally, back of neck.Methods:For the first experiment all members of the lab group were subjects. First, we stared at anobject from two feet away with our dominant eye closed and actively moved our eyes. Next, weclosed our non-dominant eye and passively moved our eye by gently pushing it to the side. Forboth steps the goal was to determine whether or not the object moved in space when the eye wasmoved. Next, we wanted to determine if an after image of a light would move with passive and
