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[Tics and Gilles de la Tourette syndrome]
1Universidade Federal do Rio de Janeiro (UFRJ), Brasil.
Arquivos De Neuro-Psiquiatria
|March 1, 1995
Summary
Gilles de la Tourette syndrome involves involuntary motor and vocal tics, often accompanied by sensory tics and compulsions. While its exact cause is unknown, neurochemical, genetic, and environmental factors are implicated in this complex neurological disorder.
Area of Science:
- Neurology
- Neuroscience
- Genetics
Background:
- Gilles de la Tourette syndrome (GTS) is a neurological disorder characterized by involuntary motor and vocal tics.
- First described in 1885, GTS pathogenesis remains incompletely understood, with proposed factors including neurochemical imbalances, genetics, and environmental influences.
Discussion:
- While structural lesions are not evident, Positron Emission Tomography (PET) studies indicate hypometabolism in the frontal cortex, basal ganglia, and other brain regions.
- Tics in GTS can be simple or complex, motor or vocal, and may coexist with sensory tics, obsessions, and compulsions.
Key Insights:
- Diagnostic criteria for GTS include age of onset, presence of both motor and vocal tics, ability to suppress tics voluntarily, variability in tic presentation, and duration exceeding one year.
- Increased dopaminergic activity in the basal ganglia is a key neurochemical hypothesis in GTS.
Outlook:
- Further research into the interplay of genetic and environmental factors is crucial for a comprehensive understanding of GTS.
- Haloperidol remains a primary pharmacological treatment for managing Tourette syndrome symptoms.