When alone, people who stutter tend not to be more fluent when talking. Researchers say the perception of being heard plays a key role in stuttering.
Astrocytes in the striatum appear to play a critical role in stuttering. Researchers found treatment with risperidone helped reduce stuttering by increasing the metabolism of striatal astrocytes.
In mice genetically engineered to carry human stuttering mutations, vocalization defects are derived from abnormalities in astrocytes in the corpus callosum.
Hyperactivity in the right hemisphere is stronger in people who stutter or have similar speech disorders than in those without speech problems, researchers report.
Cerebral blood flow is reduced in the Broca's area of people who stutter, researchers report. Additionally, the more severely a person stutters, the less blood flows to this area of the brain.
Researchers discover neuro-metabolite alterations across the brain, linking stuttering to changes in brain circuits that control speech production and circuits that support attention and emotion.
A new study reports of abnormal development of gray matter in the Broca's area for both children and adults who stutter.
Just one week of speech therapy may reorganize the brain, helping to reduce stuttering, according to a study published in the August 8, 2012, online issue of Neurology, the medical journal of the American Academy of Neurology.