A PET study of the neural systems of stuttering
Article Abstract:
Positron-emission tomographic studies of stuttering individuals show that the defect affects both the speech production and auditory functions of the brain. Stuttering is characterized by hyperactivity of the motor system in the cerebellum and cerebrum, and dominance of the right cerebrum. The frontal-temporal system involved in speech formation is deactivated. Normal speech shows marked left cerebral dominance, and deactivation of the memory and attention systems. Fluency inductions decrease the defects in the activation and deactivation seen in stuttering.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1996
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Temporal dissociation of parallel processing in the human subcortical outputs
Article Abstract:
Functional magnetic resonance imaging (fMRI) was used to study the time course of brain activation during a tactile object discrimination (TOD) task. The prefrontal cortex was found to maintain high levels of activation, but output activities in the cerebellum and basal ganglia exhibited different phasic patterns. Cerebellar activity also correlated significantly with the activity of the supplementary motor area, although not with that of the primary motor cortex. This implicated functional independence in the parallel subcortical outputs.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1999
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The temporal response of the brain after eating revealed by functional MRI
Article Abstract:
Research is presented concerning the satiation signals which are produced by the brain in humans following eating. The triggering and timing of these signals is investigated through the use of functional magnetic resonance imaging.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
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