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Title: Longitudinal Changes After Amygdala Surgery for Intractable Aggressive Behavior: Clinical, Imaging Genetics, and Deformation-Based Morphometry Study-A Case Series
Authors: GOUVEIA, Flavia VenetucciGERMANN, JurgenMORAIS, Rosa deFONOFF, Erich TalamoniHAMANI, ClementALHO, Eduardo JoaquimBRENTANI, HelenaMARTINS, Ana PaulaDEVENYI, GabrielPATEL, RaihaanSTEELE, ChristopherGRAMER, RobertCHAKRAVARTY, MallarMARTINEZ, Raquel Chacon Ruiz
Citation: NEUROSURGERY, v.88, n.2, p.E158-E169, 2021
Abstract: BACKGROUND: Intractable aggressive behavior (iAB) is a devastating behavioral disorder that may affect psychiatric patients. These patients have reduced quality of life, are more challenging to treat as they impose a high caregiver burden and require specialized care. Neuromodulatory interventions targeting the amygdala, a key hub in the circuitry of aggressive behavior (AB), may provide symptom alleviation. OBJECTIVE: To Report clinical and imaging findings from a case series of iAB patients treated with bilateral amygdala ablation. METHODS: This series included 4 cases (3 males, 19-32 years old) who underwent bilateral amygdala radiofrequency ablation for iAB hallmarked by life-threatening self-injury and social aggression. Pre- and postassessments involved full clinical, psychiatric, and neurosurgical evaluations, including scales quantifying AB, general agitation, quality of life, and magnetic resonance imaging (MRI). RESULTS: Postsurgery assessments revealed decreased aggression and agitation and improved quality of life. AB was correlated with testosterone levels and testosterone/cortisol ratio in males. No clinically significant side effects were observed. Imaging analyses showed preoperative amygdala volumes within normal populational range and confirmed lesion locations. The reductions in aggressive symptoms were accompanied by significant postsurgical volumetric reductions in brain areas classically associated with AB and increases in regions related to somatosensation. The local volumetric reductions are found in areas that in a normal brain show high expression levels of genes related to AB (eg, aminergic transmission) using gene expression data provided by the Allen brain atlas. CONCLUSION: These findings provide new insight into the whole brain neurocircuitry of aggression and suggest a role of altered somatosensation and possible novel neuromodulation targets.
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Artigos e Materiais de Revistas Científicas - FM/MNE
Departamento de Neurologia - FM/MNE

Artigos e Materiais de Revistas Científicas - FM/MPS
Departamento de Psiquiatria - FM/MPS

Artigos e Materiais de Revistas Científicas - HC/ICHC
Instituto Central - HC/ICHC

Artigos e Materiais de Revistas Científicas - HC/IPq
Instituto de Psiquiatria - HC/IPq

Artigos e Materiais de Revistas Científicas - LIM/23
LIM/23 - Laboratório de Psicopatologia e Terapêutica Psiquiátrica

Artigos e Materiais de Revistas Científicas - LIM/45
LIM/45 - Laboratório de Fisiopatologia Neurocirúrgica

Artigos e Materiais de Revistas Científicas - ODS/16
ODS/16 - Paz, justiça e instituições eficazes

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