Related Experiment Video
Updated: Mar 21, 2026

Quantitative Visualization and Detection of Skin Cancer Using Dynamic Thermal Imaging
Published on: May 5, 2011
Dynamic cutaneous information is sufficient for precise curvature discrimination
Jacob R Cheeseman1, J Farley Norman1, Astrid M L Kappers2
1Department of Psychological Sciences, Ogden College of Science and Engineering, Western Kentucky University, Bowling Green, Kentucky, 42101-1030, USA.
Older adults have reduced tactile perception compared to younger adults. Curvature discrimination was best when touch was passive, not active, for both age groups.
Area of Science:
- Psychology
- Neuroscience
- Human Perception
Background:
- Tactual perception is crucial for interacting with the environment.
- Active manual exploration typically enhances object shape perception.
- Factors influencing this enhancement are not fully understood.
Purpose of the Study:
- To investigate age-related differences in curvature discrimination.
- To compare tactile perception during active versus passive exploration.
Main Methods:
- Twenty-eight younger and older adults participated.
- Participants discriminated curved surfaces via active touch (moving finger) and passive touch (moving object).
- Dynamic cutaneous stimulation was present in both conditions.
Main Results:
- Older adults had significantly higher curvature discrimination thresholds (43.8% worse) than younger adults.
- Passive touch yielded significantly lower thresholds than active touch for both age groups.
- Curvature discrimination was most accurate under passive touch conditions.
Conclusions:
- Age significantly impacts tactile perception, with older adults showing deficits.
- Active movement does not enhance, but rather impairs, curvature discrimination.
- Passive, dynamic cutaneous stimulation provides optimal conditions for tactile curvature discrimination.
More Related Videos
09:37Combining Reflectance Confocal Microscopy with Optical Coherence Tomography for Noninvasive Diagnosis of Skin Cancers via Image Acquisition
Published on: August 18, 2022
05:23Demonstrating Hairy and Glabrous Skin Innervation in a 3D Pattern Using Multiple Fluorescent Staining and Tissue Clearing Approaches
Published on: May 20, 2022
Related Concept Videos
Degree of Curvature and Radius of Curvature
Sensory Functions of the Skin
There are two main categories of receptors on the skin: capsulated and non-capsulated. The non-capsulated ones are mainly the pain receptors. The capsulated ones can be further categorized based on the...
Somatosensation