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

Readmission Rates After Thrombectomy for Stroke , J Stroke Cerebrovasc Dis; ePub 2018 Jul 3; Ramchand, et al

Admissions for Psychotic Episodes, Epilepsy Linked , Epilepsia; ePub 2018 Jul 4; Rossi, Kim, et al

Gender and Cognition in Overweight Adults with T2D, Alzheimers Dement; ePub 2018 Jul 4; Espeland, et al

Subjective Improvements in Sleep Apnea Examined, Sleep Med; ePub 2018 Jul 4; Bhat, Gupta, et al

FDA Approves Xeomin for Excessive Drooling, Merz North America news release; 2018 Jul 3

Must Reads in Multiple Sclerosis

Brain Volume Loss as Therapeutic Response Marker , JAMA Neurology; ePub 2018 Jul 2; Andorra, et al

Assessing Environmental Factors and Risk of MS, Mult Scler Relat Disord; ePub 2018 Jun 23; Mowry, et al

Fear of Falling Impacts Leisure-Time Activity in MS, Gait Posture; ePub 2018 Jun 30; Kalron, Aloni, et al

Identifying Anxiety Symptoms in Multiple Sclerosis, Arch Phys Med Rehab; ePub 2018 Jun 30; Hughes, et al

Spinal Cord Volume Loss: Marker of MS Progression, Neurology; ePub 2018 Jun 27; Tsagkas, Magon, et al