134


 Subqroup Data

 To better understand how specific lesion locations

affect skin conductance responding, attempts were made to

examine subgroups of the lesioned sample. Within the RHD

group, there were 2 subjects with primarily anterior

lesions, 3 subjects with posterior lesions, 5 subjects with

mixed lesions, 1 subject with corrupt SCR data, and 1

subject whose CT scan could not be obtained, but a report of

the scan stated that the patient had a temporal/parietal

infarct. In the LHD group, 1 subject had an anterior

lesion, 1 had a primarily anterior lesion, 6 had posterior

lesions, 1 had a primarily posterior lesion, 3 had mixed

lesions. Since dividing the groups into anterior,

posterior, and mixed groups created groups that were too

small for proper analysis, attempts were made to calculate

prediction intervals and to examine individual differences

in skin conductance responding. Unfortunately the

prediction intervals were too large and included non-

responders.

 Tranel and Damasio (1994) found that RHD patients with

attenuation or abolition of SCR when viewing emotional

pictures had damage involving the right supramarginal gyrus

and angular gyrus. Thus, subjects were divided into two new

groups; anterior and posterior. Subjects in the anterior

group had lesions that were previously considered anterior

or mixed (not including areas 39 and 40). Subjects in the