Clinical Edge

Summaries of Must-Read Clinical Literature, Guidelines, and FDA Actions

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.

This Week's Must Reads

Vegetable/Fruit Intake Benefits Cognitive Function, Neurology; ePub 2018 Nov 21; Yuan, Fondell, et al

Alzheimer Dementia and Age-Related Neuropathologies, Ann Neurol; ePub 2018 Nov 12; Boyle, Yu, et al

Kidney Function and Post-Stroke Mortality Examined, Stroke; ePub 2018 Nov 9; El Husseini, Fonarow, et al

Meditation May Help to Alleviate US Stroke Burden, J Stroke Cerebrovasc Dis; ePub 2018 Nov 24; Ambavane, et al

Must Reads in Multiple Sclerosis

Exposure to Animals Associated with Risk of MS, Mult Scler Relat Disord; ePub 2018 Nov 15; de Jong, et al

White Matter Tract Disruption, Fatigue Examined, Mult Scler Relat Disord; ePub 2018 Nov 9; Fuchs, et al

Coexistence of Multiple Sclerosis, Alzheimer Disease, Mult Scler Relat Disord; ePub 2018 Oct 27; Luczynski, et al

Body Mass Index Linked with Brain Volume Change, Neurology; ePub 2018 Nov 14; Mowry, Azevedo, et al

Detection of Whole Brain, Deep GM Atrophy in MS, PLoS One; ePub 2018 Nov 8; Chu, Kim, et al