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Theta Burst Stimulation of the Precuneus Modulates Resting State Connectivity in the Left Temporal Pole

journal contribution
posted on 2023-06-09, 05:32 authored by Matteo Mancini, Chiara Mastropasqua, Sonia Bonnì, Viviana Ponzo, Mara Cercignani, Silvia Conforto, Giacomo Kock, Marco Bozzali
It has been shown that continuous theta burst stimulation (cTBS) over the precuneus acts on specific memory retrieval abilities. In order to study the neural mechanisms beyond these findings, we combined cTBS and resting-state functional magnetic resonance imaging. Our experimental protocol involved stimulation and sham conditions on a group of healthy subjects, and each condition included a baseline and two follow-up acquisitions (5 and 15 min after baseline) after cTBS. We analysed brain functional connectivity by means of graph theoretical measures, with a specific focus on the network modular structure. Our results showed that cTBS of the precuneus selectively affects the left temporal pole, decreasing its functional connectivity in the first follow-up. Moreover, we observed a significant increase in the size of the module of the precuneus in the second follow-up. Such effects were absent in the sham condition. We observed here a modulation of functional connectivity as a result of inhibitory stimulation over the precuneus. Such a modulation first acts indirectly on the temporal area and then extends the connectivity of the precuneus itself by a feed-back mechanism. Our current findings extend our previous behavioural observations and increase our understanding of the mechanisms underlying the stimulation of the precuneus.

History

Publication status

  • Published

File Version

  • Published version

Journal

Brain Topography

ISSN

0896-0267

Publisher

Springer Verlag

Issue

3

Volume

30

Page range

312-319

Department affiliated with

  • BSMS Neuroscience Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2017-03-22

First Compliant Deposit (FCD) Date

2017-03-22

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