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Panych, Lawrence

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Panych

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Lawrence

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Panych, Lawrence
Author's Publications: search.filters.isAuthorOfPublication.a212554c-aa4e-44e4-bcb1-f141dfbf6cae

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    Factors in sensory processing of prosody in schizotypal personality disorder: An fMRI experiment
    (Elsevier BV, 2010) Dickey, Chandlee; Morocz, Istvan Akos; Minney, Daniel; Niznikiewicz, Margaret; Voglmaier, Martina; Panych, Lawrence; Khan, Usman; Zacks, Rayna; Terry, Douglas P.; Shenton, Martha; McCarley, Robert William
    Introduction—Persons diagnosed with schizophrenia demonstrate deficits in prosody recognition. To examine prosody along the schizophrenia spectrum, antipsychotic-naïve schizotypal personality disorder (SPD) subjects and healthy control subjects were compared. It was hypothesized that SPD subjects would perform more poorly; with cognitive and demographic factors contributing to the poor performance. The superior temporal gyrus (STG) was selected as the region-of-interest (ROI) given its known abnormalities in SPD and its important role in the processing of prosody. Methods—SPD and healthy comparison (HC) subjects were matched on age, IQ, and parental social-economic status (PSES). Cognitive measures included the Speech Sound Perception Test (SSPT) to examine phonological processing (SPD= 68, HC = 74) and the Verbal Fluency task to examine executive functioning (SPD = 129, HC = 138). The main experiment was a novel fMRI task of prosody identification using semantically neutral sentences spoken with emotional prosody (SPD = 16, HC = 13). Finally, volumetric measurement of the superior temporal sulcus (STS), a key region for processing prosody, and partially overlapping with the STG, was performed (SPD = 30, HC = 30). Results—Phonological processing and executive functioning were both impaired in SPD subjects compared with HC subjects. Contrary to the prediction, SPD subjects, as a group, were similar to HC subjects in terms of correctly indentifying the emotion conveyed and reaction time. Within the SPD group, prosody identification accuracy was influenced by executive functioning, IQ and perhaps PSES, relationships not found with HC subjects. Phonological perception aided prosody identification in both diagnostic groups. As expected, both groups activated the STG while performing the prosody identification task. However, SPD subjects may have been less “efficient” in their recruitment of STG neurons. Finally, SPD subjects demonstrated a trend toward smaller STS volumes on the left, particularly the lower bank. Conclusions—These data suggest that subtle differences between SPD and controls in phonological processing, executive functioning, IQ, and possibly PSES, contributed to difficulty in processing prosody for some SPD subjects.
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    Facial emotion recognition and facial affect display in schizotypal personality disorder
    (Elsevier BV, 2011) Dickey, Chandlee; Panych, Lawrence; Voglmaier, Martina; Niznikiewicz, Margaret; Terry, Douglas P.; Murphy, Cara; Zacks, Rayna; Shenton, Martha; McCarley, Robert William
    Background—Patients with schizophrenia have deficits in facial affect expression and detection that hinder social interactions. The goal of this study was to examine whether or not epidemiologically-related antipsychotic-naïve schizotypal personality disorder (SPD) subjects would have similar deficits as patients with schizophrenia. Methods—Matched SPD and healthy comparison (HC) subjects were asked to identify the eight classic emotions (SPD N=55, HC N=67) and to discriminate gender. Subjects (SPD N=22, HC N=17) were also photographed while displaying the same emotional expressions. Raters scored the subjects’ facial expressions along several dimensions. Results—SPD subjects compared with HC were slower and less accurate in identifying facial expressions. This may have been driven by deficits in identifying gender. Although raters were able to identify correctly SPD and HC subjects’ expressions equally well, raters found SPD subjects’ facial expressions to be more odd, more ambiguous, and the subjects less attractive in general compared with HC subjects. Raters were less confident in their ability to correctly interpret SPD subjects’ facial expressions and raters were less comfortable with the idea of spending time with the SPD subjects compared with HC subjects. Conclusions—SPD subjects face two hurdles in terms of daily social interactions. They have problems both in correctly interpreting others’ facial expressions and in generating socially attractive and unambiguous facial expressions.