Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Transcribed Image Text:G. Tactile Localization
Tactile localization is the ability to determine exactly which portion of the skin has been
touched. Some areas of the body have a high density of touch receptors, and a strong ability to
localize a stimulus. Other areas have a lower density of receptors and less ability to localize a
stimulus.
The subject should sit with eyes closed. Touch the palm of the subject's hand with a colored
marker or pen. The subject then tries to touch that exact point with a different colored marker or pen.
Measure the error in millimeters. Test all the areas three times, recording the results in the table
below.
Body area
Trial 1
Trial 2
Trial 3
Trial 4
Upper back Fingertip
Anterior forearm
Anterior arm
Palm of hand
1. Which areas seem to have a greater density of receptors?
a. Upper back fingertip
c. Anterior arm
b. Anterior forearm
d. Palm of hand
2. Does this agree with your findings in the two-point discrimination test?
a. Yes
b. No
c. Cannot be determined
3. Does the ability to localize the stimulus consistently improve over all three trials?
a. Yes
b. No
c. Cannot be determined
Transcribed Image Text:G. Tactile Location
1.
2.
3.
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