Two-point threshold Test your partner’s ability to recognize the difference between one or two points of skin being stimulated simultaneously. To do this, follow these steps: Have your partner place a hand with the palm up on the table and close his or her eyes. Hold the tips of a forceps tightly together and gently touch the skin of your partner’sindex finger. Ask your partner to report if it feels like one or two points are touching the finger. Allow the tips of the forceps to spread so they are 1 mm apart, press both points againstthe skin simultaneously, and ask your partner to report as before. Repeat this procedure, allowing the tips of the forceps to spread more each time untilyour partner can feel both tips being pressed against the skin. The minimum distancebetween the tips of the forceps when both can be felt is called the two-point threshold. As soon as you are able to distinguish two points, two separate receptors are beingstimulated instead of only one receptor. Record the two-point threshold for the skin of the index finger in Part C of the laboratoryreport. Repeat this procedure to determine the two-point threshold of the palm, the back of thehand, the back of the neck, the leg, and the sole. Record the results in Part C of thelaboratory report. Answer the questions in Part C of the laboratory report. PART C: 1. Record the two-point threshold in millimeters for skin in each of the following regions: a. Index finger b. Palm c. Back of hand d. Back of neck e. Anterior thighs f. Sole 2. Answer the following questions: What region of the skin tested has the greatest ability to discriminate two points? What region of the skin has the least sensitivity to this test? What is the significance of these observations in questions a and b?

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,...

See similar textbooks

Related questions

Question

Procedure: Two-point threshold

Test your partner’s ability to recognize the difference between one or two points of skin being stimulated simultaneously. To do this, follow these steps:

Have your partner place a hand with the palm up on the table and close his or her eyes.
Hold the tips of a forceps tightly together and gently touch the skin of your partner’sindex finger.
Ask your partner to report if it feels like one or two points are touching the finger.
Allow the tips of the forceps to spread so they are 1 mm apart, press both points againstthe skin simultaneously, and ask your partner to report as before.
Repeat this procedure, allowing the tips of the forceps to spread more each time untilyour partner can feel both tips being pressed against the skin. The minimum distancebetween the tips of the forceps when both can be felt is called the two-point threshold. As soon as you are able to distinguish two points, two separate receptors are beingstimulated instead of only one receptor.
Record the two-point threshold for the skin of the index finger in Part C of the laboratoryreport.
Repeat this procedure to determine the two-point threshold of the palm, the back of thehand, the back of the neck, the leg, and the sole. Record the results in Part C of thelaboratory report.
Answer the questions in Part C of the laboratory report.

PART C:

1. Record the two-point threshold in millimeters for skin in each of the following regions:

a. Index finger
b. Palm
c. Back of hand
d. Back of neck
e. Anterior thighs
f. Sole

2. Answer the following questions:

What region of the skin tested has the greatest ability to discriminate two points?
What region of the skin has the least sensitivity to this test?
What is the significance of these observations in questions a and b?

Expert Solution