Characterizing sentence intonation in a right hemisphere-damaged population

Area of Science:

• Neurolinguistics
• Speech and Hearing Sciences
• Cognitive Neuroscience

Background:

• Sentence intonation production in patients with right hemisphere damage (RHD) is not fully understood.
• Previous studies offer conflicting views on the intonation abilities of RHD individuals.
• A comprehensive acoustic analysis using natural speech is needed.

Purpose of the Study:

• To characterize sentence intonation in RHD patients using detailed acoustic parameters.
• To compare intonation patterns between RHD speakers and healthy controls in naturalistic speech.
• To investigate how RHD affects fundamental frequency (F0) manipulation across different sentence types.

Main Methods:

• Eight RHD speakers and seven controls produced declarative, imperative, yes-no, and wh-questions.
• Speech samples were elicited via a story completion task for naturalistic speech.
• Acoustic analysis included F0 slope, contour linearity, and F0 variance for terminal and preterminal contours.

Main Results:

• RHD speakers exhibited less linear and flatter F0 decline in declarative sentences compared to controls.
• Yes-no questions from RHD patients showed reduced F0 dispersion and restricted preterminal pitch range.
• Terminal intonation properties differed between groups for three of the four sentence types.

Conclusions:

• RHD is associated with disturbances in fundamental frequency manipulation across sentence types.
• Findings support theories of general dysprosody in right hemisphere-damaged individuals.
• Acoustic analysis reveals specific deficits in prosodic production following RHD.