Tourette syndrome: the self under siege.

Area of Science:

• Neuroscience
• Developmental Psychology
• Genetics

Background:

• Tourette syndrome (TS) is a neurodevelopmental disorder characterized by motor and vocal tics.
• Onset is typically prepubertal, with boys more commonly affected.
• Tics are often preceded by sensory urges, suggesting sensorimotor gating deficits.

Purpose of the Study:

• To explore the phenomenology and natural history of Tourette syndrome.
• To understand the role of somatosensory urges and sensorimotor gating in TS.
• To investigate potential genetic and neural circuit underpinnings of TS.

Main Methods:

• Review of existing literature on Tourette syndrome.
• Analysis of clinical observations regarding tic manifestation and progression.
• Integration of findings from genetic studies, brain imaging, and electrophysiology.

Main Results:

• Tics exhibit waxing and waning patterns, peaking in severity during preadolescence.
• Most individuals experience significant tic reduction by adulthood.
• Co-occurring conditions like ADHD and OCD often contribute more to impairment than tics themselves.

Conclusions:

• Understanding the sensory-urge-tic response is crucial for developing behavioral treatments.
• Advances in genetics and neuroscience are enhancing the comprehension of TS.
• Further research into neural circuitry and memory may unlock deeper insights into TS phenomenology.