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Deep brain stimulation induces white matter remodeling and functional changes to brain-wide networks

Fujimoto, S. H.; Fujimoto, A.; Elorette, C.; Seltzer, A.; Andraka, E.; Verma, G.; Janssen, W. G.; Fleysher, L.; Folloni, D.; Choi, K. S.; Russ, B. E.; Mayberg, H. S.; Rudebeck, P. H.

2024-06-14 neuroscience
10.1101/2024.06.13.598710 bioRxiv
Show abstract

Deep brain stimulation (DBS) is an emerging therapeutic option for treatment resistant neurological and psychiatric disorders, most notably depression. Despite this, little is known about the anatomical and functional mechanisms that underlie this therapy. Here we targeted stimulation to the white matter adjacent to the subcallosal anterior cingulate cortex (SCC-DBS) in macaques, modeling the location in the brain proven effective for depression. We demonstrate that SCC-DBS has a selective effect on white matter macro- and micro-structure in the cingulum bundle distant to where stimulation was delivered. SCC-DBS also decreased functional connectivity between subcallosal and posterior cingulate cortex, two areas linked by the cingulum bundle and implicated in depression. Our data reveal that white matter remodeling as well as functional effects contribute to DBSs therapeutic efficacy.

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