TY - JOUR
T1 - Preliminary findings on the relation between the personality trait of stress reaction and the central neural control of human vocalization
AU - Dietrich, Maria
AU - Andreatta, Richard D.
AU - Jiang, Yang
AU - Joshi, Ashwini
AU - Stemple, Joseph C.
N1 - Funding Information:
The authors thank David Powell, PhD, at the University of Kentucky, for helpful discussions and technical support. Generous support for this research was provided by the Office of Research in the College of Health Sciences, University of Kentucky.
PY - 2012/8
Y1 - 2012/8
N2 - The objectives of this study were to examine whether the personality trait of stress reaction (SR), as assessed with the Multidimensional Personality Questionnaire-Brief Form (MPQ-BF), (1) influences prefrontal and limbic area activity during overt sentence reading and if (2) SR and associated individual differences in prefrontal and limbic activations correlate with sensorimotor cortical activity during overt sentence reading. Ten vocally healthy adults (22-57 years) participated in a functional MRI study using an event-related sparse sampling design to acquire brain activation data during sentence production tasks (covert, whispered, overt). The outcome measure was the blood oxygenation level-dependent signal change in prefrontal, limbic, and primary somatosensory (S1) and motor cortices (M1). Significant positive correlations were found between SR scores and S1, dorsolateral prefrontal cortex (both r=.73, p <.05), and periaqueductal gray (r=.88, p <.01) activity. M1 activity was positively correlated with SR (r=.64, p <.05) and negatively with social potency (r= -.70, p <.05). Our findings suggest that motor cortical control subserving voice and speech production varies with expression of selected personality traits. Future studies should investigate the functional significance of personality differences in the central neural control of vocalization.
AB - The objectives of this study were to examine whether the personality trait of stress reaction (SR), as assessed with the Multidimensional Personality Questionnaire-Brief Form (MPQ-BF), (1) influences prefrontal and limbic area activity during overt sentence reading and if (2) SR and associated individual differences in prefrontal and limbic activations correlate with sensorimotor cortical activity during overt sentence reading. Ten vocally healthy adults (22-57 years) participated in a functional MRI study using an event-related sparse sampling design to acquire brain activation data during sentence production tasks (covert, whispered, overt). The outcome measure was the blood oxygenation level-dependent signal change in prefrontal, limbic, and primary somatosensory (S1) and motor cortices (M1). Significant positive correlations were found between SR scores and S1, dorsolateral prefrontal cortex (both r=.73, p <.05), and periaqueductal gray (r=.88, p <.01) activity. M1 activity was positively correlated with SR (r=.64, p <.05) and negatively with social potency (r= -.70, p <.05). Our findings suggest that motor cortical control subserving voice and speech production varies with expression of selected personality traits. Future studies should investigate the functional significance of personality differences in the central neural control of vocalization.
KW - Functional magnetic resonance imaging
KW - Limbic system
KW - Personality
KW - Stress reaction
KW - Voice
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U2 - 10.3109/17549507.2012.688865
DO - 10.3109/17549507.2012.688865
M3 - Article
C2 - 22698155
AN - SCOPUS:84863424430
SN - 1754-9515
VL - 14
SP - 377
EP - 389
JO - International Journal of Speech-Language Pathology
JF - International Journal of Speech-Language Pathology
IS - 4
ER -