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A correction and a comment on Craig and Lyle (2001)
1Indiana University, Department of Psychology, Bloomington 47405-7007, USA. craigj@indiana.edu
Perception & Psychophysics
|June 7, 2002
Summary
Tactile spatial acuity differs between the palm and fingertip, aligning with innervation density. However, psychophysical performance on the palm is poorer than predicted by receptor spacing alone.
Area of Science:
- Neuroscience
- Human sensory perception
Background:
- Tactile spatial acuity was measured on the palm and fingertip.
- Results were compared to estimates of innervation density.
Discussion:
- The study suggests Craig and Lyle (2001) should have compared results to receptor spacing, not innervation density.
- Psychophysical performance on the palm is significantly poorer than predicted by receptor spacing.
Key Insights:
- Innervation density alone does not fully explain tactile acuity differences between palm and fingertip.
- Receptor spacing is a critical factor in tactile spatial acuity, particularly on the palm.
Outlook:
- Further research is needed to explore the discrepancy between predicted and actual psychophysical performance on the palm.
- Investigating other factors influencing tactile spatial acuity beyond receptor spacing is recommended.