PT  - JOURNAL ARTICLE
AU  - Gouveia, Flavia V.
AU  - Germann, Jürgen
AU  - de Morais, Rosa M. C. B.
AU  - Fonoff, Erich T.
AU  - Hamani, Clement
AU  - Alho, Eduardo Joaquim
AU  - Brentani, Helena
AU  - Martins, Ana Paula
AU  - Devenyi, Gabriel
AU  - Patel, Raihaan
AU  - Steele, Christopher J.
AU  - Gramer, Robert
AU  - Chakravarty, M. Mallar
AU  - Martinez, Raquel C. R.
TI  - Clinical, imaging genetics and deformation based morphometry study of longitudinal changes after surgery for intractable aggressive behaviour
AID  - 10.1101/548826
DP  - 2019 Jan 01
TA  - bioRxiv
PG  - 548826
4099  - http://biorxiv.org/content/early/2019/03/27/548826.short
4100  - http://biorxiv.org/content/early/2019/03/27/548826.full
AB  - Intractable aggressive behaviour is a devastating behavioural disorder that reach 30% of psychiatric aggressive patients. Neuromodulatory surgeries may be treatment alternatives to reduce suffering. We investigated the outcomes of bilateral amygdala radiofrequency ablation in four patients with intractable aggressive behaviour (life-threatening-self-injury and social aggression) by studying whole brain magnetic resonance imaging and clinical data. Post-surgery assessments revealed decreases in aggression and agitation and improvements in quality of life. Aggressive behaviour was positively correlated with serum testosterone levels and the testosterone/cortisol ratio in males. No clinically significant side effects were observed. Imaging analyses revealed preoperative amygdala volumes within normal range and confirmed appropriate lesion locations. Reduction in aggressiveness were accompanied by volumetric reduction in brain areas associated with aggressive behaviour (express genes related to aggressive behaviour), and increases in regions related to somatosensation. These findings further elucidates the neurocircuitry of aggression and suggests novel neuromodulation targets.