Maximum sensitivity of the Clinical test shown in Photograph is exhibited in
C. Finger pads
Ans:C. Finger pads
(Test shown:Two-point discrimination test)
- It is the ability to discern that two nearby objects touching the skin are truly two distinct points, not one.
- Normal and Impaired Performance:
- Body areas differ both in tactile receptor density and somatosensory cortical representation.
- Normally, a person should be able to recognize two points separated by 2 to 8 mm on fingertips.
- On the lips, it is 2 to 4 mm, and on the palms, it is 8 to 12 mm and 30–40 mm on the shins or back.
- The posterior column-medial lemniscus pathway is responsible for carrying information involving fine, discriminative touch.
- Therefore, two-point discrimination can be impaired by damage to this pathway or to a peripheral nerve.