Weber Two-Point Discrimination Test: Difference between revisions
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== Introduction == | == Introduction == | ||
== | == Method == | ||
The examiner uses a '''paper clip, two point discriminator, or calipers''' to apply pressure on two adjacent points in longitudinal direction or perpendicular to the long axis of the finger. The minimal distance with which the patient can distinguish between two stimuli is found by moving from proximal to distal. This distance is called '''threshold for discrimination'''. The area being tested must not be seen by the patient and the patient must concentrate on feeling the points. For accurate results the hand must be immobile on hard surface and it must be ensured that the two points are simultaneously touching the skin. | |||
There must be no skin blanching as it indicates too much pressure being applied. There may be increase or decrease in the distance between the points depending on the patient's response. Starting distance between the points can be easily distinguished. If the patients is hesitant to respond or becomes inaccurate, patient is required to respond accurately on several trials before the test can be repeated. | |||
Normal discrimination distance recognition is less than 6mm, but it varies from person to person. This test is best for hand sensation involving static holding of object between the finger and thumb requiring pinch strength. | |||
=== Two Point Discrimination Value === | |||
* Normal <6mm | |||
* Fair 6-10mm | |||
* Poor 11-15mm | |||
* Protective where only one point is perceived | |||
* Anesthetic where points are not perceived | |||
== References == | == References == | ||
Revision as of 06:51, 25 January 2021
Original Editor - Chelsea Mclene
Top Contributors - Chelsea Mclene, Kim Jackson and Aminat Abolade
Introduction[edit | edit source]
Method[edit | edit source]
The examiner uses a paper clip, two point discriminator, or calipers to apply pressure on two adjacent points in longitudinal direction or perpendicular to the long axis of the finger. The minimal distance with which the patient can distinguish between two stimuli is found by moving from proximal to distal. This distance is called threshold for discrimination. The area being tested must not be seen by the patient and the patient must concentrate on feeling the points. For accurate results the hand must be immobile on hard surface and it must be ensured that the two points are simultaneously touching the skin.
There must be no skin blanching as it indicates too much pressure being applied. There may be increase or decrease in the distance between the points depending on the patient's response. Starting distance between the points can be easily distinguished. If the patients is hesitant to respond or becomes inaccurate, patient is required to respond accurately on several trials before the test can be repeated.
Normal discrimination distance recognition is less than 6mm, but it varies from person to person. This test is best for hand sensation involving static holding of object between the finger and thumb requiring pinch strength.
Two Point Discrimination Value[edit | edit source]
- Normal <6mm
- Fair 6-10mm
- Poor 11-15mm
- Protective where only one point is perceived
- Anesthetic where points are not perceived
