Lateralized brain damage and performance on trail making A and B, digit span forward and backward, and TPT memory and location

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Abstract
The present retrospective study was undertaken to determine whether Trail Making Test A and B, Digit Span Forward and Backward, and TPT Memory and Location scores are differentially sensitive to right or left hemisphere brain damage. Groups of patients with right, left, and generalized cerebral lesions and matched normal controls were compared. Results showed a relative failure for any individual measure, difference, or ratio score to reliably distinguish between right and left hemisphere lesions. Patients with diffuse lesions performed significantly worse than non-neurologic medical controls and right and left lesion groups on Trails A and TPT Memory and Location. Results are discussed in terms of specific methodological variables including chronicity of lesion, the nature of the task demands, and priming effects.

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