CHAPTER 2
 STATEMENT OF THE PROBLEM


 The purpose of the present study was to broadly examine

 emotional responsivity of RHD and LHD patients in affect-

 evoking situations and determine whether the pattern of

 responses obtained from these patients was more in line with

 predictions of a global right hemisphere model versus a

 bivalent hemisphere emotion model. To examine this verbal

 report, autonomic measures of arousal (SCR, HR), and indices

 of facial muscle movement (EMG) were be collected in

 situations that are known to elicit negative (anticipation

 of shock) and positive responses (anticipation of reward) in

 normals.

 To date, few neuropsychological studies of emotion with

focal lesion patients have concurrently investigated more

than one component of emotional responsivity. That is,

either autonomic indices have been obtained (Heilman,

Schwartz, & Watson, 1978) or verbal report of mood states

have been obtained (Robinson & Price, 1982). No study to

date has used facial EMG to examine emotional responsivity

in focal lesion patients. Facial EMG may potentially be a

useful tool in that it has been shown to be sensitive to