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Two-point discrimination (2PD) is the ability to discern that two nearby objects touching the skin are truly two distinct points, not one.It is often tested with two sharp points during a neurological examination [1]: 632 [2]: 71 and is assumed to reflect how finely innervated an area of skin is.
Proponents have also claimed that adults may also show signs of sensory processing difficulties and would benefit for sensory processing therapies, [71] although this work has yet to distinguish between those with SPD symptoms alone vs adults whose processing abnormalities are associated with other disorders, such as autism spectrum disorder. [72]
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The purpose of this form of tactile discrimination is to detect any defects in the Central nervous system such as lesions in the Brainstem, Spinal cord, Thalamus, or Sensory cortex. In order for this test to be carried out successfully, it is imperative that the subject's primary sensations be fully functional.
In psychophysics, sensory threshold is the weakest stimulus that an organism can sense. Unless otherwise indicated, it is usually defined as the weakest stimulus that can be detected half the time, for example, as indicated by a point on a probability curve. [1] Methods have been developed to measure thresholds in any of the senses.
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Sensory based motor disorder. Patients have incorrect processing of motor information that leads to poor motor skills. Sensory processing disorder or sensory discrimination disorder, which is characterized by postural control problems, lack of attentiveness, and disorganization. There are several therapies used to treat SPD.
The 1980s, with the introduction of inexpensive computers, opened up a new door for cognitive neuroscience research. Currently, ERP is one of the most widely used methods in cognitive neuroscience research to study the physiological correlates of sensory, perceptual and cognitive activity associated with processing information. [5]