Parts 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.
Which areas of the skin are most sensitive to the two-point discrimination test?
They advised that the skin must be touched simultaneously and with equal pressure to accurately test two-point discrimination. These authors concurred that the tip of the tongue (1.5 mm) and finger tips (2–3 mm) were far more sensitive than the cheeks and the back of the hands (12 mm).
Which part of the body has the smallest 2 point discrimination thresholds?
Two-point threshold is smallest in the finger (2 mm). Two-point threshold on the forearms is 30 mm; on the back it is 70 mm.
Which test area has the best two-point discrimination quizlet?
Body parts like the face and hands had the smallest receptive fields and greatest two point discriminations during the lab. This is due to the large number of small receptive fields and relatively small amount of convergence of nerves in these areas, increasing acuity.
What Tactile receptor is most involved with 2 point discrimination?
Areas of the body with large cortical representations ( e.g., fingers, face, lips ) typically have the greatest tactile discrimination. The ability to recognize two separate points applied simultaneously to the skin from a single point is called two point discrimination.
What parts of the body are most and least sensitive to two-point discrimination?
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.
What body part has the largest spatial threshold?
Which part of the body has the largest spatial threshold? The glabrous skin of the hand and the forehead were the areas of highest spatial acuity, regardless of the method used (pairs of successive or simultaneous stimuli), for both touch and pain.
What is the two-point threshold?
A measure of tactile acuity defined as the smallest separation at which two points applied simultaneously to the skin can be clearly distinguished from a single point. It varies from 1 or 2 millimetres in the finger pads and tongue to more than 60 millimetres on the upper arm, upper thigh, and back .
What influences the size of the two-point threshold?
There are various factors that can influence two-point discrimination values including test site, sex, test modality, age, device, and applied force 3 , 10 , 25 , 26 . It is well established that spatial acuity varies from one body site to another 24 .
What is called as the two-point discrimination threshold quizlet?
Two-point discrimination is the ability to discern that two nearby objects touching the skin are truly two distinct points, not one. ... 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.
What would be the general concept of two-point discrimination?
Two-point discrimination is the ability to distinguish two compass points simultaneously applied to the skin . The normal minimal distance is 3 cm for the hand or foot and 0.6 cm for the fingertips.
What did the two-point discrimination test demonstrate quizlet?
WHAT WAS DEMONSTRATED BY THE TWO-POINT DISCRIMINATION TEST? THE DEMONSTRATION IS TESTING TOUCH RECEPTORS, AND HOW THEY ARE DISTRIBUTED IN DIFFERENT AREAS OF THE BODY . ... MY PREDICTIONS WERE WAY OFF; THE SPACE (DISTANCE) BETWEEN THE TOUCH RECEPTORS WERE GREATER THAN EXPECTED.
What was demonstrated by the two-point discrimination test?
By using the two-point discrimination test described by Weber. The points of calipers are held against the skin at different distances from each other . The test determines the minimal distance at which the patient can distinguish whether one or two points are in contact with the skin.
Which of the following is incorrect about the number of spinal nerves?
| Question Answer | Which of the following is INCORRECT about the numbers of spinal nerves? 7 pairs of cervical spinal nerves | Which of the following parts of a spinal nerve carries sensory information only? posterior (dorsal) root | The anterior root and posterior root fuse to form a(n): spinal nerves |
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Which area of the body has the largest receptive field?
The fingertips have the highest spatial resolution (and the smallest receptive fields) while the thigh and calf region have the lowest spatial resolution (and largest receptive fields). The spatial resolution to light-touch stimulation can be evaluated by measuring two-point discrimination thresholds.
