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Community Isolation, Functional Connectivity in MS

Brian Struct Funct; ePub 2018 Feb 16; Patel, et al

Structural disconnection, known to occur in multiple sclerosis (MS), contributes to network resting-state functional connectivity (rsFC) changes in MS, a recent study found. Furthermore, community isolation is responsible for elevated network functional connectivity. Given the known dependence of rsFC on underlying structural connectivity (SC), researchers examined an alternative hypothesis: that topographical changes in SC, specifically particular patterns of disconnection, contribute to increased network rsFC. They obtained measures of rsFC using fMRI and SC using probabilistic tractography in 50 healthy and 28 MS subjects. They found:

  • Altering the model by introducing structural disconnection patterns observed in the MS subjects with high network rsFC generates simulations with high rsFC as well, suggesting that disconnection itself plays a role in producing high network functional connectivity.
  • In MS subjects with high network rsFC, there was a preferential disconnection between the relevant network and wider system.
  • As observed empirically, simulated network rsFC increases with removal of connections bridging a community with the remainder of the brain.

Citation:

Patel KR, Tobyne S, Porter D, Bireley JD, Smith V, Klawiter E. Structural disconnection is responsible for increased functional connectivity in multiple sclerosis. [Published online ahead of print February 16, 2018]. Brain Struct Funct. doi:10.1007/s00429-018-1619-z.

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Must Reads in Multiple Sclerosis

Pediatric Onset MS Linked with Reduced Parental QOL, Mult Scler; ePub 2018 Aug 30; O’Mahony, et al

Depressive Symptoms Negatively Impact on MS, J Neuropsychiatry Clin Neurosci; ePub 2018 Sep 6; Gill, et al

Evaluation of the MULES Picture Naming Test, J Neurol Sci; ePub 2018 Aug 23; Seay, Akhand, et al

Postrelapse Rehabilitation Use in MS Examined , Int J MS Care; ePub 2018 Sep 5; Asano, Eitzen, et al

Thalamic White Matter in Patients with MS, Hum Brain Mapp; 2018 Oct; Bergsland, et al