Functional Neuroanatomy of Tics: A Brain Network Perspective

Area of Science:

• Neuroscience
• Neurology
• Medical Imaging

Background:

• Tourette syndrome (TS) is characterized by motor and vocal tics.
• The underlying pathophysiology of tics in TS is not fully understood.
• Functional Magnetic Resonance Imaging (fMRI) offers insights into brain function related to TS symptoms.

Purpose of the Study:

• To review existing fMRI studies on Tourette syndrome.
• To examine brain activity during key tic-related phenomena: premonitory urge, tic release, and tic suppression.
• To contextualize findings within large-scale functional brain networks.

Main Methods:

• Systematic review of functional MRI (fMRI) studies in Tourette syndrome.
• Analysis of brain activity patterns associated with tic urges, execution, and suppression.
• Integration of findings into a network-level framework of brain organization.

Main Results:

• Consistent patterns of brain activity were observed during tic-related phenomena in Tourette syndrome.
• These patterns are primarily associated with the cingulo-opercular action-mode network.
• fMRI data highlights specific network involvement in the pathophysiology of tics.

Conclusions:

• A network-level understanding of brain function in Tourette syndrome is emerging.
• The cingulo-opercular network plays a crucial role in tic generation and suppression.
• This network framework may guide the development of novel, targeted therapeutic interventions for Tourette syndrome.