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concealed videotapes were used in the second group. One
problem with these differences is that stroke patients may
have more severe cognitive deficits than comparable tumor
patients (Anderson, Damasio & Tranel, 1990). Secondly,
acute pathology is associated with more pervasive deficits
(Borod, in press). Thirdly, FACS may be insufficiently
sensitive to facial expressive communication (Buck, 1990).
Asymmetries in facial expressiveness have also been
examined in normal adults. In a recent review of 23 studies
of spontaneous expression and 24 studies of posed
expression, Borod (in press) concluded that the left
hemiface is more intense and moves more than the right
hemiface. According to Borod, these results were stronger
for negative than positive emotions. There have been
fewer studies of prosodic emotion than facial expression of
emotion in patients with unilateral damage. Studies of
spontaneous prosodic expression have revealed deficits in
RHD patients compared to LHD patients and NHD controls (Ross
& Mesulam, 1979; Borod et al. 1985; Gorelick & Ross, 1987;
Ross, 1981) Similar results were found in investigations
of voluntary affective prosody, such that RHD patients
showed impairment relative to LHD and NHD controls (Borod et
al., 1990; Gorelick & Ross, 1987; Tucker, et al., 1977).
However, Cancelliere and Kertesz (1990) found no impairments
in either RHD and LHD patients relative to NHD controls.