Question

help 7-11 please clear legible writing

7. Which area of the body had the largest two-point discrimination? Which area of the body had the smallest two-point discrimination? 8. Compare the tuning fork time values to the two-point discrimination test distance. Was there any correlation between the 2 values? How might these values give insight to the size of the receptive field and the number of neurons present in the specific area tested? 9. Was there a relationship between sensory adaptation with both vibration time and two- point discrimination? Does this provide insight to the number of neurons dedicated to innervate a specific area of the body? Please explain. 10. Predict the relationship between sensory adaptation time and the size of the receptive field. Explain. 11. Would the areas with a longer sensory adaptation time likely be suited for gross or fine motor activities? Explain.

Answer 1

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 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 and is assumed to reflect how finely innervated an area of a skinIn clinical settings, two-point discrimination is a widely used technique for assessing tactile perception.It relies on the ability and/or willingness of the patient to subjectively report what they are feeling and should be completed with the patient’s eyes closed. The therapist may use calipers or simply a reshaped paperclip to do the testing. The therapist may alternate randomly between touching the patient with one point or with two points on the area being tested (e.g. finger, arm, leg, toe). The patient is asked to report whether one or two points was felt. The smallest distance between two points that still results in the perception of two distinct stimuli is recorded as the patient's two-point threshold. 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.

Different areas of the body have receptive fields of different sizes, giving some better resolution in two-point discrimination. The tongue and finger pads have very high resolution, while the back has very low. This is illustrated as the distance where the two points can be felt as separate. arts of the body with the highest densities of touch receptors will have the greatest degree of two-point discrimination. Places such as the fingertips and lips will be able to sense 2 toothpicks even when they're very close together.

Spatial acuity is the smallest discriminated distance between two points of contact. Moberg paid further attention to the importance of tactile discrimination, and established the term 'tactile gnosis.