Evidence for the pathological right-handedness hypothesis
- Affiliated Author(s)
- 이상도; 손은익
- Alternative Author(s)
- Yi, Sang Do; Son, Eun Ik
- Journal Title
- Neuropsychology
- ISSN
- 0894-4105
- Issued Date
- 2001
- Abstract
- The present study investigated handedness of 109 Korean patients with temporal lobe
epilepsy (TLE) and 120 normal control participants. Left TLE was associated with a
significantly raised incidence of left-handers relative to normal controls. More important for
the present purpose, right TLE was associated with a significantly raised incidence of strong
right-handers relative to normal controls. This finding indicates that certain early damage to
the right brain causes a mild hypofunction of the left hand in natural weak right-handers,
which in turn causes the patient to switch to strong right-handedness. To the authors'
knowledge, this finding provides the 1st empirical evidence supporting the pathological
right-handedness hypothesis. Prior failure to find evidence of pathological right-handedness
may reflect the low base rate of natural left-handers rather than true absence of pathological
right-handers.
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