Perception & Psychophysics

, Volume 70, Issue 8, pp 1471–1488 | Cite as

Retention of high tactile acuity throughout the life span in blindness

  • Gordon E. Legge
  • Cindee Madison
  • Brenna N. Vaughn
  • Allen M. Y. Cheong
  • Joseph C. Miller


Previous studies of tactile acuity on the fingertip, using passive touch, have demonstrated an age-related decline in spatial resolution for both sighted and blind subjects. We have reexamined this age dependence with two newly designed tactile-acuity charts that require active exploration of the test symbols. One chart used dot patterns similar to braille, and the other used embossed Landolt rings. Groups of blind braille readers and sighted subjects ranging from 12 to 85 years old were tested in two experiments. We replicated previous findings for sighted subjects by showing an age-related decrease in tactile acuity by nearly 1% per year. Surprisingly, the blind subjects retained high acuity into old age, showing no age-related decline. For the blind subjects, tactile acuity did not correlate with braille reading speed, the amount of daily reading, or the age at which braille was learned. We conclude that when measured with active touch, blind subjects retain high tactile acuity into old age, unlike their aging sighted peers. We propose that blind people's use of active touch in daily activities, not specifically braille reading, results in preservation of tactile acuity across the life span.


  1. Ahissar, M., & Hochstein, S. (1993). Attentional control of early perceptual learning. Proceedings of the National Academy of Sciences, 90, 5718–5722.CrossRefGoogle Scholar
  2. Buchel, C., Price, C., Frackowiak, R. S., & Friston, K. (1998). Different activation patterns in the visual cortex of late and congenitally blind subjects. Brain, 121, 409–419.PubMedCrossRefGoogle Scholar
  3. Burton, H., Snyder, A. Z., Conturo, T. E., Akbudak, E., Ollinger, J. M., & Raichle, M. E. (2002). Adaptive changes in early and late blind: A fMRI study of braille reading. Journal of Neurophysiology, 87, 589–607.PubMedGoogle Scholar
  4. Cascio, C. J., & Sathian, K. (2001). Temporal cues contribute to tactile perception of roughness. Journal of Neuroscience, 21, 5289–5296.PubMedGoogle Scholar
  5. Chapman, C. E. (1994). Active versus passive touch: Factors influencing the transmission of somatosensory signals to primary somatosensory cortex. Canadian Journal of Physiology & Pharmacology, 72, 558–570.Google Scholar
  6. Cohen, L. G., Celnik, P., Pascual-Leone, A., Corwell, B., Faiz, L., Dambrosia, J., et al. (1997). Functional relevance of cross-modal plasticity in blind humans. Nature, 389, 180–183.PubMedCrossRefGoogle Scholar
  7. Conover, W. J., & Iman, R. L. (1981). Rank transformations as a bridge between parametric and nonparametric statistics. American Statistician, 35, 124–129.CrossRefGoogle Scholar
  8. Craig, J. C., & Johnson, K. O. (2000). The two-point threshold: Not a measure of tactile spatial resolution. Current Directions in Psychological Science, 9, 29–32.CrossRefGoogle Scholar
  9. Craig, J. C., & Lyle, K. B. (2001). A comparison of tactile spatial sensitivity on the palm and fingerpad. Perception & Psychophysics, 6, 337–347.Google Scholar
  10. Craig, J. C., & Lyle, K. B. (2002). A correction and a comment on Craig and Lyle (2001). Perception & Psychophysics, 64, 504–506.CrossRefGoogle Scholar
  11. Dinse, H. R., Kleibel, N., Kalisch, T., Ragert, P., Wilimzig, C., & Tegenthoff, M. (2006). Tactile coactivation resets age-related decline of human tactile discrimination. Annals of Neurology, 60, 88–94.PubMedCrossRefGoogle Scholar
  12. Efron, B., & Tibshirani, R. J. (1993). An introduction to the bootstrap. New York: Chapman & Hall.Google Scholar
  13. Facchini, S., & Aglioti, S. M. (2003). Short term light deprivation increases tactile spatial acuity in humans. Neurology, 60, 1998–1999.PubMedGoogle Scholar
  14. Ferezou, I., Bolea, S., & Petersen, C. C. H. (2006). Visualizing the cortical representation of whisker touch: Voltage-sensitive dye imaging in freely moving mice. Neuron, 50, 617–629.PubMedCrossRefGoogle Scholar
  15. Ferris, F. L., III, Kassoff, A., Bresnick, G. H., & Bailey, I. (1982). New visual acuity charts for clinical research. American Journal of Ophthalmology, 94, 91–96.PubMedGoogle Scholar
  16. Gibson, J. J. (1962). Observations on active touch. Psychological Review, 69, 477–491.PubMedCrossRefGoogle Scholar
  17. Goldreich, D., & Kanics, I. M. (2003). Tactile acuity is enhanced in blindness. Journal of Neuroscience, 23, 3439–3445.PubMedGoogle Scholar
  18. Goldreich, D., & Kanics, I. M. (2006). Performance of blind and sighted humans on a tactile grating detection task. Perception & Psychophysics, 68, 1363–1371.CrossRefGoogle Scholar
  19. Grant, A. C., Thiagarajah, M. C., & Sathian, K. (2000). Tactile perception in blind Braille readers: A psychophysical study of acuity and hyperacuity using gratings and dot patterns. Perception & Psychophysics, 62, 301–312.Google Scholar
  20. Grunwald, A. P. (1966). A braille-reading machine. Science, 154, 144–146.PubMedCrossRefGoogle Scholar
  21. Heller, M. A. (1986). Active and passive braille recognition. Bulletin of the Psychonomic Society, 24, 201–202.Google Scholar
  22. Hollins, M. (1989). Understanding blindness: An integrative approach. Hillsdale, NJ: Erlbaum.Google Scholar
  23. Hsiao, S. S., O'Shaughnessy, D. M., & Johnson, K. O. (1993). Effects of selective attention on spatial form processing in monkey primary and secondary somatosensory cortex. Journal of Neurophysiology, 70, 444–447.PubMedGoogle Scholar
  24. Johnson, K. O., & Hsiao, S. S. (1992). Neural mechanisms of tactual form and texture perception. Annual Review of Neuroscience, 15, 227–250.PubMedCrossRefGoogle Scholar
  25. Johnson, K. O., & Phillips, J. R. (1981). Tactile spatial resolution. I. Two-point discrimination, gap detection, grating resolution, and letter recognition. Journal of Neurophysiology, 46, 1177–1192.PubMedGoogle Scholar
  26. Kauffman, T., Théoret, H., & Pascual-Leone, A. (2002). Braille character discrimination in blindfolded human subjects. NeuroReport, 13, 571–574.PubMedCrossRefGoogle Scholar
  27. Krupa, D. J., Wiest, M. C., Shuler, M. G., Laubach, M., & Nicolelis, M. A. L. (2004). Layer-specific somatosensory cortical activation during active tactile discrimination. Science, 304, 1989–1992.PubMedCrossRefGoogle Scholar
  28. Kuusisto, S. (1999, March 21). Lives: In the dark. New York Times. Retreived February 1, 2008, from membercenter/ nytarchive.html.Google Scholar
  29. Lederman, S. J., & Klatzky, R. L. (1987). Hand movements: A window into haptic object recognition. Cognitive Psychology, 19, 342–368.PubMedCrossRefGoogle Scholar
  30. Legge, G. E. (1978). Sustained and transient mechanisms in human vision: Temporal and spatial properties. Vision Research, 18, 69–81.PubMedCrossRefGoogle Scholar
  31. Legge, G. E. (2007). Psychophysics of reading in normal and low vision. Mahwah, NJ: Erlbaum.Google Scholar
  32. Legge, G. E., Madison, C. M., & Mansfield, J. S. (1999). Measuring Braille reading speed with the MNREAD test. Visual Impairment Research, 1, 131–145.CrossRefGoogle Scholar
  33. Loomis, J. M. (1981). On the tangibility of letters and braille. Perception & Psychophysics, 29, 37–46.Google Scholar
  34. Loomis, J. M. (1985). Tactile recognition of raised characters: A parametric study. Bulletin of the Psychonomic Society, 23, 18–20.Google Scholar
  35. Loomis, J. M., & Lederman, S. J. (1984, November). What utility is there in distinguishing between active and passive touch? Paper presented at the 25th Annual Meeting of the Psychonomic Society, San Antonio, TX.Google Scholar
  36. Loomis, J. M., & Lederman, S. J. (1986). Tactual perception. In K. R. Boff, L. Kaufman, & J. P. Thomas (Eds.), Handbook of perception and human performance: Vol. 2. Cognitive processes and performance (pp. 1–41). New York: Wiley.Google Scholar
  37. Madison, C. M., & Legge, G. E. (1998). Tactile acuity in Braille and non-Braille readers. Investigative Ophthalmology & Visual Science (Suppl.), 39, 175.Google Scholar
  38. Merabet, L. B., Swisher, J. D., McMains, S. A., Halko, M. A., Amedi, A., Pascual-Leone, A., & Somers, D. C. (2007). Combined activation and deactivation of visual cortex during tactile sensory processing. Journal of Neurophysiology, 97, 1633–1641.PubMedCrossRefGoogle Scholar
  39. Millar, S. (1997). Reading by touch. London: Routledge.CrossRefGoogle Scholar
  40. National Research Council Committee on Vision (1980). Recommended standard procedures for the clinical measurement of and specification of visual acuity. Advances in Ophthalmology, 41, 103–148.Google Scholar
  41. Nolan, C. Y., & Kederis, C. J. (1969). Perceptual factors in Braille word recognition. New York: American Foundation for the Blind.Google Scholar
  42. Pascual-Leone, A., & Torres, F. (1993). Plasticity of the sensorimotor cortex representation of the reading finger in Braille readers. Brain, 116, 39–52.PubMedCrossRefGoogle Scholar
  43. Polley, D. B., Steinberg, E. E., & Merzenich, M. M. (2006). Perceptual learning directs auditory cortical map reorganization through top-down influences. Journal of Neuroscience, 26, 4970–4982.PubMedCrossRefGoogle Scholar
  44. Ragert, P., Schmidt, A., Altenmüller, E., & Dinse, H. R. (2004). Superior tactile performance and learning in professional pianists: Evidence for meta-plasticity in musicians. European Journal of Neuroscience, 19, 473–478.PubMedCrossRefGoogle Scholar
  45. Sadato, N., Pascual-Leone, A., Grafmani, J., Ibañez, V., Deiber, M.-P., Dold, G., & Hallett, M. (1996). Activation of the primary visual cortex by Braille reading in blind subjects. Nature, 380, 526–528.PubMedCrossRefGoogle Scholar
  46. Stevens, J. C. (1992). Aging and spatial acuity of touch. Journal of Gerontology, 47, P35-P40.PubMedGoogle Scholar
  47. Stevens, J. C., Alvarez-Reeves, M., Dipietro, L., Mack, G. W., & Green, B. G. (2003). Decline of tactile acuity in aging: A study of body site, blood flow, and lifetime habits of smoking and physical activity. Somatosensory & Motor Research, 20, 271–279.CrossRefGoogle Scholar
  48. Stevens, J. C., & Choo, K. K. (1996). Spatial acuity of the body surface over the life span. Somatosensory & Motor Research, 13, 153–166.CrossRefGoogle Scholar
  49. Stevens, J. C., Foulke, E., & Patterson, M. Q. (1996). Tactile acuity, aging, and Braille reading in long-term blindness. Journal of Experimental Psychology: Applied, 2, 91–106.CrossRefGoogle Scholar
  50. Stevens, J. C., & Patterson, M. Q. (1995). Dimensions of spatial acuity in the touch sense: Changes over the life span. Somatosensory & Motor Research, 12, 29–47.CrossRefGoogle Scholar
  51. Van Boven, R. W., Hamilton, R. H., Kauffman, T., Keenan, J. P., & Pascual-Leone, A. (2000). Tactile spatial resolution in blind Braille readers. Neurology, 54, 2230–2236.PubMedGoogle Scholar
  52. Vega-Bermudez, F., & Johnson, K. O. (2001). Differences in spatial acuity between digits. Neurology, 56, 1389–1391.PubMedGoogle Scholar
  53. Vega-Bermudez, F., & Johnson, K. O. (2004). Fingertip skin conformance accounts, in part, for differences in tactile spatial acuity in young subjects, but not for the decline in spatial acuity with aging. Perception & Psychophysics, 66, 60–67.CrossRefGoogle Scholar
  54. Vega-Bermudez, F., Johnson, K. O., & Hsiao, S. S. (1991). Human tactile pattern recognition: Active versus passive touch, velocity effects, and patterns of confusion. Journal of Neurophysiology, 65, 531–546.PubMedGoogle Scholar
  55. Wallman, J., & Winawer, J. (2004). Homeostasis of eye growth and the question of myopia. Neuron, 43, 447–468.PubMedCrossRefGoogle Scholar
  56. Weisser, V., Stilla, R., Peltier, S., Hu, X., & Sathian, K. (2005). Short-term visual deprivation alters neural processing of tactile form. Experimental Brain Research, 166, 572–582.CrossRefGoogle Scholar

Copyright information

© Psychonomic Society, Inc. 2008

Authors and Affiliations

  • Gordon E. Legge
    • 1
  • Cindee Madison
    • 1
  • Brenna N. Vaughn
    • 1
  • Allen M. Y. Cheong
    • 1
  • Joseph C. Miller
    • 1
  1. 1.Department of PsychologyUniversity of MinnesotaMinneapolis

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