Compass Aesthesiometer Manufacturer,Supplier and Exporter in India
Product Code : EL-CA-2406
Jlab Export is a leading Compass Aesthesiometer Manufacturer,and suppliers in India
A compass aesthesiometer measures two-point discrimination, the smallest gap at which a person feels two points on the skin as two and not one. Its two blunt points sit on compass arms that open and close to set the gap. Physiology and psychology classes use it to map touch sensitivity over different parts of the body.
Specifications
| Type | Compass aesthesiometer with two adjustable points |
| Test | Two-point discrimination on the skin |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 4–6 working days |
| Manufacturer | JLab (Jain Laboratory Instruments Pvt Ltd), Ambala, India |
Two-Point Discrimination Practicals
The subject sits with eyes closed. The tester touches the skin with either one point or both points together, in a random order, and the subject answers one or two. Starting with a wide gap, the tester closes the compass step by step until the subject can no longer tell two points apart. The smallest gap still felt as two is the threshold for that spot.
Students map the threshold on the fingertip, palm, forearm, back of the neck and back, and plot the results. Before each trial they can check the gap with a Vernier Caliper. The same session on the sensory system often covers vibration sense. It is tested with a fork from a Tuning Forks Set held on a bony point, and tendon reflexes, tested with a Reflex Hammer.
Frequently Asked Questions
What does a two-point discrimination test show?
It shows how finely an area of skin can resolve touch. A small threshold means many touch receptors with small receptive fields, so two close points excite separate receptors. A large threshold means the receptors are sparse and each one covers a wide patch of skin.
Why is the threshold much smaller on the fingertip than on the back?
Fingertips have a dense supply of touch receptors with small receptive fields, and a large area of the sensory cortex handles them. The skin of the back has fewer receptors spread over larger fields, so the points must be far apart before they feel like two.
Why mix one-point touches in with two-point touches?
If every touch uses both points, the subject soon learns to answer two each time. Single touches given at random show whether the answers are real. Count a gap as felt only when the subject is right on most trials at that gap.
What mistakes affect the result?
The two points must land at the same moment and with the same light pressure. If one point touches first or presses harder, the subject may report two points at a gap that is really below threshold. Letting the subject watch the compass also spoils the test.
Other Physiology Practical Apparatus
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Last updated: 6 November 2026