The role of the anterior cingulate cortex was also especially studied since it is largely suspected to play an important role in TD. This is why a study in both VBM and structural networks focused on it \cite{Jackson2021}. This study found, first, a decreased gray-matter signal within the anterior cingulate cortex and, second, an increased structural covariance between it and the motor parts of the cerebellum, the inferior frontal cortex and the posterior cingulate cortex.