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Performance on the two extremities can be compared for discrepancies. Although the test is still commonly used clinically, it has been roundly criticized by many researchers as providing an invalid measure of tactile spatial acuity, and several highly regarded alternative tests have been proposed to replace it.
Fremitus is a vibration transmitted through the body. [1] In common medical usage, it usually refers to assessment of the lungs by either the vibration intensity felt on the chest wall (tactile fremitus) and/or heard by a stethoscope on the chest wall with certain spoken words (vocal fremitus), although there are several other types.
In UK bronchophony is often called "vocal resonance" and is similar to "tactile vocal fremitus" (TVF); the difference being that in TVF the sensor is the edge of the hand. All three - whispering pectoriloquy, TVF and vocal resonance - fulfill the same purpose, to distinguish between consolidation and pleural effusion, both of which cause ...
Two-alternative forced choice (2AFC) is a method for measuring the sensitivity of a person or animal to some particular sensory input, stimulus, through that observer's pattern of choices and response times to two versions of the sensory input. For example, to determine a person's sensitivity to dim light, the observer would be presented with a ...
The two-point threshold is the smallest distance between the two points that the patient can recognize. [17] By conducting this form of tactile discrimination, it is believed that practitioners will be able to discern the relative amount of nerves in the tested location.
Barognosis, or baresthesia, is the ability to evaluate the weight of objects, or to differentiate objects of different weights, by holding or lifting them. [1] [2] It is the opposite of abarognosis, the inability to evaluate the weight of objects.
Graphesthesia can be considered as a type of synthetic sensation as it involves a complex interaction between three neural components i.e. Tactile sensation, two point discrimination and cortical component that stores infirmation about the symbol/letter that is being traced in the skin and was learned through some previous experience.
A common test used to measure the sensitivity of a person to tactile stimuli is measuring their two-point touch threshold. This is the smallest separation of two points at which two distinct points of contact can be sensed rather than one.