Cortex
Volume 44, Issue 8 , Pages 1030-1036, September 2008

Left hand tactile agnosia after posterior callosal lesion

  • Maddalena Balsamo

      Affiliations

    • Neuropsychology Laboratory, Department of Psychology, Second University of Naples, Naples, Italy
    • ,
  • Luigi Trojano

      Affiliations

    • Neuropsychology Laboratory, Department of Psychology, Second University of Naples, Naples, Italy
    • Corresponding Author InformationCorresponding author. Department of Psychology, Second University of Naples, Via Vivaldi 43, 81100 Caserta, Italy.
    • ,
  • Arcangelo Giamundo

      Affiliations

    • Department of Neurological Sciences, Federico II University, Naples, Italy
    • ,
  • Dario Grossi

      Affiliations

    • Neuropsychology Laboratory, Department of Psychology, Second University of Naples, Naples, Italy

Received 24 October 2007; received in revised form 8 December 2007 and 7 January 2008; accepted 15 January 2008. published online 01 July 2008.

Abstract 

We report a patient with a hemorrhagic lesion encroaching upon the posterior third of the corpus callosum but sparing the splenium. She showed marked difficulties in recognizing objects and shapes perceived through her left hand, while she could appreciate elementary sensorial features of items tactually presented to the same hand flawlessly. This picture, corresponding to classical descriptions of unilateral associative tactile agnosia, was associated with finger agnosia of the left hand. This very unusual case report can be interpreted as an instance of disconnection syndrome, and allows a discussion of mechanisms involved in tactile object recognition.

Keywords: Tactile agnosia, Finger agnosia, Tactile object recognition, Disconnection syndrome, Corpus callosum

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PII: S0010-9452(08)00118-4

doi:10.1016/j.cortex.2008.01.003

Cortex
Volume 44, Issue 8 , Pages 1030-1036, September 2008

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