Why is deep brain stimulation for treatment-resistant depression a needed treatment option?

Why is deep brain stimulation for treatment-resistant depression a needed treatment option? Braz J Psychiatry. 2020 May 11;: Authors: Riva-Posse P PMID: 32401869 [PubMed - as supplied by publisher]

https://www.ncbi.nlm.nih.gov/pubmed/32401869?dopt=Abstract

Source: Revista Brasileira de Psiquiatria - May 10, 2020 Category: Psychiatry Authors: Riva-Posse P Tags: Braz J Psychiatry Source Type: research