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1

NEUROCOGNITIVE CORRELATES OF REDUCTION OF VERBAL FLUENCY FOLLOWING RIGHT-HEMISPHERIC STROKE

100%
Jodzio K.
Psychological Studies
|
2006
|
vol. 44
|
issue 2
5-19
EN
The study aimed at evaluating of verbal fluency in right hemisphere-damaged patients. Forty-six vascular right hemisphere-damaged (RHD) and 30 control subjects were submitted to a verbal fluency task for which criteria were either phonemic or semantic. The strategies that the participants used spontaneously in order to maximize word production, namely clustering (CL) and switching (SW) techniques, were evaluated. Results showed (a) that RHD subjects do show a significant reduction of verbal fluency as compared to controls, (b) that this reduction is more prominent for the phonetic criterion, and (c) that verbal fluency impairment in the RHD subjects is predominantly a consequence of dysfunction to the frontal cortex and subcortical nuclei (i.e. striatum and thalamus). Both CL and SW strategies were related to total word production on both tasks. These results tend to agree with a general theory on a right-hemisphere contribution to lexical processing, and more specifically, to its phonological aspects, as well as to executive component of verbal fluency.
2

FACTORS THAT MODIFY THE PERFORMANCE OF RIGHT HEMISPHERE STROKE PATIENTS ON FACIAL AFFECT RECOGNITION TEST

88%
Harciarek M.
Kolokwia Psychologiczne (Psychological Colloquia)
|
2006
|
vol. 14
97-109
EN
The aim of the present study was to characterize the relationship between left hemispatial neglect (LHN), post-stroke depression, and recognition of emotional facial expression. The Facial Affect Recognition Test by Ekman & Friesen (1976) was administered to 30 RHS patients and 31 demographically matched normal controls. Statistical analyzes revealed that all RHS patients were impaired on the Facial Affect Recognition Test. Additionally, a significant negative correlation between the severity of LHN and the total number of correctly identified emotional faces emerged. Interestingly, the severity of LHN did not correlate with the time needed to complete the Facial Affect Recognition Test, whereas the severity of depression did. However, no significant relationship was found between the severity of depression and the number of correctly identified emotional faces. Moreover, regardless of depression, lack of LHN was associated with significantly better RHS patients' performance on the Facial Affect Recognition Test. These results are consistent with previous studies demonstrating impaired recognition of facial expression among RHS patients. Our study also suggests that there is a unique relationship between LHN, depression, and recognition of facial expression.
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