Tics and Tourette's: update on pathophysiology and tic control.

Area of Science:

• Neuroscience
• Neurology
• Psychiatry

Background:

• Tics and Tourette syndrome (TS) are complex neurological disorders.
• The cortico-basal ganglia-thalamo-cortical circuits are implicated in tic generation.
• GABAergic inhibition disruption is central to tic pathophysiology, with emerging roles for cholinergic and histaminergic systems.

Purpose of the Study:

• To review recent advancements in understanding tic pathophysiology.
• To explore novel insights into the mechanisms of tic control.
• To discuss current and future treatment approaches for tics and associated conditions.

Main Methods:

• Review of current literature on Tourette syndrome and tic disorders.
• Analysis of findings from animal models and human neuroimaging studies.
• Synthesis of research on neurochemical and neurocircuitry alterations.

Main Results:

• Tic generation involves cortico-basal ganglia-thalamo-cortical loops.
• Altered interoception and habit formation are features in TS.
• Voluntary tic inhibition capacity is linked to prefrontal cortex function and body part affected.
• Premonitory urge intensity correlates with interoceptive awareness via the insular cortex.

Conclusions:

• Understanding tic pathophysiology requires a multidisciplinary approach.
• Novel insights into brain function in TS pave the way for innovative treatments.
• Treatment strategies for tics vary by age and may include behavioral, pharmacological, and surgical interventions.