PRE-LAB Activity 3: Performing a Two-Point Discrimination Test 1. Which instrume

Question

PRE-LAB Activity 3: Performing a Two-Point Discrimination Test 1. Which instrument will be used to determine the ability of a subject to discriminate between two points? sy ad benle eevtst General Sensory Receptors Because action potentials, once generated, are ider body distinguishes among different stimuli region of the cerebral cortex that receives the sens originating from the receptor. entire Sensory receptors respond to various stimuli, both external and internal, and they are often classified according to the source of the stimulus. These receptors act as transducers- that is, they convert stimuli into afferent nerve impulses. Sensory receptors can be classified in various classification method groups sensory receptors adc 356

Explanation / Answer

Two point discrimination test is a test that is employed by a therapist to test the ability of a patient to distinguish that two nearby objects that are touching his/her skin are truly two separate points but not one. The therapist uses a caliper, a three-pong aesthesiometer, a Disk-criminator, or a reshaped paperclip to do this test. Therefore, the instrument that is used to determine the ability of a subject to discriminate between two points is a caliper, a three-pong aesthesiometer, a Disk-criminator, or a reshaped paperclip. Receptor density is not the same throughout the body because of which the tactile sensitivity varies. In a sensitive area of the body such as the finger tip, receptors must be packed densely so that different receptors are activated by two points that are very close to each other. Normally a person can recognize two points that are separated by a distance of 2-8 mm on finger tips, 2-4 mm on the lips, 8-12 mm on the palms, and 30-40 mm on the back. The posterior column-medial lemniscus pathway is involved in carrying information to two separate central neuronal population of cells for discriminating two nearby objects as distinct but not one.

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