Corpus callosum morphology in children who stutter

Area of Science:

• Neuroanatomy
• Developmental neuroscience
• Speech and language disorders

Background:

• Previous studies indicate functional and neuroanatomical differences in adults who stutter.
• Developmental data suggest potential structural brain differences in school-aged children who stutter.
• The role of the corpus callosum in stuttering is not fully understood.

Purpose of the Study:

• To investigate if aberrant corpus callosum morphology is implicated in persistent childhood stuttering.
• To compare the corpus callosum in children with persistent stuttering, recovered stuttering, and typically developing children.
• To examine developmental differences in corpus callosum anatomy related to stuttering.

Main Methods:

• Compared the corpus callosum midsagittal area and subsection areas in children aged 9-12.
• Utilized Medical Image Processing, Analysis, and Visualization (MIPAV) for measurements.
• Employed voxel-based morphometry (VBM) to compare white matter volume.

Main Results:

• No significant differences were detected in total corpus callosum area or white matter volume.
• No differences were found in specific corpus callosum subsections (rostrum, anterior midbody, posterior midbody, splenium).
• Findings align with dichotic listening studies showing a typical right ear advantage in children who stutter.

Conclusions:

• Aberrant callosal morphology is not implicated in childhood stuttering.
• Observed neural reorganization in adults who stutter may be a long-term adaptation.
• Childhood stuttering does not appear to stem from structural midline brain differences.