PSY 206 Unit 2 IP 1 - Aspects of Psychology PSY 206 Unit 2...

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Aspects of Psychology PSY 206 Unit 2 IP By Michelle Mantonya Nov 24, 2007 Experiment 1 The adaptation of Cutaneous Receptors. (Sense of touch) By rubbing my finger on course sandpaper I will describe how the sense of touch adapts to the coarseness of the sandpaper over a period of time and stopping. Then describing how the sense of touch has changed when rubbing the same finger on the sandpaper a second time. Adaptation is a loss of sensitivity to a stimulus by the receptors as a result of continued presentation of that stimulus. Mechanoreceptors respond to skin deformation caused by the rough texture of the sand paper. The first time, sand paper was very coarse; I would rate it about a 7, being most coarse. After the second time it felt about the same. The third time, it felt not so rough about a 6. Each time the rate number went lower suggests the differential threshold. I then waited a minute and rubbed my fingers across the sandpaper again. That time it felt like only about a 4 even though my fingerprints had been wore down and the skin was a little thinner. Adaptation was evident by the sand paper feeling smoother because that rough texture was repeated and it made my mechanoreceptors not so sensitive. The receptors involved were, as I said, was the cutaneous receptors which stimulated the mechanoreceptors. They stimulated the neurons to release more machanorececptors all the way to the brain. The process of converting the stimulus received by the receptors into electrochemical energy is called transduction. The activation of the receptors is called sensation. The sensation that I felt was coarseness and friction. After the information gets to the brain, the understanding of this information is called perception. I perceived the coarseness of the sandpaper to be less because of the repetitive sensation even though the thermoreceptors were being activated because of the friction, were becoming more sensitive along with my nocioreceptors that started to be receptive to the tenderness of my skin being not as thick as it should be. Adaptation is important in this instance because the coarseness of the sandpaper being rubbed would be come painful very quickly because of the friction being produced. On the other hand, feeling the pain would allow you to stop before too much damage was done.
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