The limit of tactile spatial resolution in humans: Grating orientation discrimination at the lip, tongue, and finger

Neurology ◽  
1994 ◽  
Vol 44 (12) ◽  
pp. 2361-2361 ◽  
Author(s):  
R. W. Van Boven ◽  
K. O. Johnson
Keyword(s):  
Spatial Resolution ◽  
Orientation Discrimination ◽  
Tactile Spatial Resolution

Relationship between tactile spatial resolution and digital dexterity during childhood

2010 ◽  
Vol 27 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Yannick Bleyenheuft ◽  
Pauline Wilmotte ◽  
Jean-Louis Thonnard
Keyword(s):  
Spatial Resolution ◽  
Tactile Spatial Resolution

Tactile spatial resolution in blind Braille readers

Neurology ◽  
2000 ◽  
Vol 55 (10) ◽  
pp. 1597-1597 ◽  
Author(s):  
J. R. Ponsford ◽  
R. W. Van Boven
Keyword(s):  
Spatial Resolution ◽  
Tactile Spatial Resolution

Age-related changes in tactile spatial resolution from 6 to 16 years old

2006 ◽  
Vol 23 (3-4) ◽  
pp. 83-87 ◽  
Author(s):  
Yannick Bleyenheuft ◽  
Caroline Cols ◽  
Carlyne Arnould ◽  
Jean-Louis Thonnard
Keyword(s):  
Spatial Resolution ◽  
Age Related ◽  
Tactile Spatial Resolution ◽  
Age Related Changes

Tactile spatial resolution measured manually: A validation study

2007 ◽  
Vol 24 (3) ◽  
pp. 111-114 ◽  
Author(s):  
Yannick Bleyenheuft ◽  
Jean-Louis Thonnard
Keyword(s):  
Spatial Resolution ◽  
Validation Study ◽  
Tactile Spatial Resolution

The Two-Point Threshold

2000 ◽  
Vol 9 (1) ◽  
pp. 29-32 ◽  
Author(s):  
James C. Craig ◽  
Kenneth O. Johnson
Keyword(s):  
Spatial Resolution ◽  
Neural Mechanisms ◽  
Valid Measure ◽  
New Methods ◽  
Spatial Mechanisms ◽  
Extreme Variability ◽  
Compass Test ◽  
Tactile Spatial Resolution

The two-point threshold, or compass test, has long been used as a measure of tactile spatial resolution; however, since it was first developed, there have been problems associated with its use. Some of these problems include setting an appropriate criterion for responding “two,” extreme variability both within and between subjects, and the ability of subjects to discriminate two points from one at separations well below the two-point threshold. Recent neurophysiological results have clarified some of the neural mechanisms responsible for spatial resolution and demonstrated the inadequacy of the two-point threshold as a measure of spatial mechanisms. Several new methods may overcome these problems and provide a valid measure of spatial resolution and a reflection of neural mechanisms.

Tactile Perception of Spatial Stimuli on the Lip Surface by Young and Older Adults

1996 ◽  
Vol 39 (6) ◽  
pp. 1191-1198 ◽  
Author(s):  
Amy B. Wohlert
Keyword(s):  
Older Adults ◽  
Old Age ◽  
Spatial Resolution ◽  
Tactile Perception ◽  
Sensory Function ◽  
Orientation Discrimination ◽  
Lower Lip ◽  
Age Related ◽  
Oral Sensory ◽  
Oral Sensory Function

Although older adults are subject to both subtle changes and major disorders of the oral sensorimotor system, relatively little is known about oral sensory function in old age. Accurate assessment of oral tactile perception is needed to document disability, aid prognosis, and plan treatment for older adults with disorders affecting speech or feeding. However, normative information currently available for older adults is mainly based on two-point discrimination, a problematic measure of tactile spatial resolution. Grating orientation discrimination, a technique developed to provide a clear and reliable measure of spatial resolution, was used to test sensitivity of the upper and lower lip vermilion, on right and left sides, in a sample of 40 young adults and 40 adults age 66–85. Results indicated that spatial acuity at the lip vermilion declines significantly in old age and that women tend to have better acuity than men. No significant differences were found in acuity between the upper and lower lips or between right and left sides for either age group. Peripheral changes in receptor density and lip tissue composition are suggested as likely causes for the age-related decline.

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