Voxel-based morphometry of auditory and speech-related cortex in stutterers

Area of Science:

• Neuroscience
• Speech Science
• Neuroimaging

Background:

• Stuttering is associated with altered neural activation during speech production.
• Previous research indicates reduced auditory cortex activation in stutterers.
• The neuroanatomical basis of these functional differences remains largely unexplored.

Purpose of the Study:

• To investigate neuroanatomical differences in speech-related cortical regions between stutterers and non-stutterers.
• To determine if functional brain differences in stuttering correlate with structural brain abnormalities.

Main Methods:

• Utilized voxel-based morphometry (VBM) to analyze brain structure.
• Compared localized grey matter and white matter densities.
• Focused on speech-related cortical regions in both stutterers and non-stutterers.

Main Results:

• Identified significant differences in grey matter density in specific brain regions.
• Revealed significant differences in white matter density in relevant areas.
• Observed these structural variations in both left and right hemispheres.

Conclusions:

• Stutterers exhibit distinct neuroanatomical differences in speech and auditory processing areas.
• These structural brain variations may underlie the functional differences observed in stuttering.
• Findings contribute to understanding the neurobiology of stuttering.