A patient's graphanesthesia,or inability to recognize a number or letter you have drawn on the palm of his hand,is most likely the result of a dysfunction of the

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The ability to identify numbers,letters,or shapes drawn on the skin is termed graphesthesia.Graphanesthesia is the inability to recognize the number or letter drawn on the skin and,in the presence of intact peripheral sensation,indicates parietal lobe dysfunction.Peripheral neuropathies will interfere with position sense.Spinal cord lesions will interfere with vibratory sense.Lesions of the thalamus will interfere with position sense.

A Patient's Graphanesthesia,or Inability to Recognize a Number or Letter