Voluntary inhibitory motor control over involuntary tic movements

Area of Science:

• Neuroscience
• Movement Disorders
• Neuropsychology

Background:

• Inhibitory control is essential for adaptive motor behavior.
• Hyperkinetic movement disorders, like tics, are often linked to disinhibition in cortico-striato-thalamo-cortical (CSTC) pathways.
• Tics, however, can paradoxically be voluntarily controlled, questioning their purely involuntary nature.

Purpose of the Study:

• To define and explore voluntary inhibitory tic control.
• To examine the relationship between voluntary tic inhibition, premonitory urges, and executive functions.
• To discuss the neural basis and clinical significance of voluntary tic inhibition in Tourette syndrome.

Main Methods:

• Literature review defining voluntary inhibitory tic control.
• Examination of associations with premonitory urges and executive control.
• Discussion of neural correlates and clinical relevance.

Main Results:

• Voluntary inhibitory tic control is a distinct phenomenon.
• Evidence links voluntary tic inhibition to executive functions and premonitory urges.
• Neural correlates and somatotopic selectivity of this control are being elucidated.

Conclusions:

• Voluntary inhibitory tic control offers new insights into tic pathophysiology.
• Understanding this control is clinically relevant for Tourette syndrome.
• Further research is needed to address knowledge gaps in this area.