Abstract Details

Title Disability or Disease: What Stands at the Basis of Connectivity Patterns within the Visual Network following Damage to the Optic Nerve?

Topic Multiple Sclerosis

Presentation(s) P3 - Poster Session 3 (5:30 PM-6:30 PM)

Poster/Presentation
Number 15-028

Objective To study connectivity patterns within the visual cortex following optic neuritis (ON) and to test whether visual network behavior following damage to the optic nerve is driven by disease type or by form of disability.

Background We have previously shown that functional modification in the visual cortex of clinically isolated ON (CIS-ON) patients may occur to compensate for the damage sustained by the affected optic nerve. Now, utilizing graph theory analysis methods we delve into the individual regions of the visual system and expand our study to include neuromyelitis optica spectrum disorder (NMOSD) patients, comparing both disease and disability.

Design/Methods Eighty-eight subjects, including 18 CIS-ON, 21 CIS without ON (CIS-nON), and 23 NMOSD, as well as 26 healthy controls (HC) underwent resting state functional MRI (RS-fMRI). Visual networks were constructed through inter-regional temporal correlations of RS-fMRI time-courses, comprising 50 visual regions (25 per hemisphere).

Results No significant differences were found between hemispheres in any of the groups. Both hemispheres show that the HC visual networks are significantly denser than the CIS-nON group and that the CIS-ON and NMOSD groups are similar in overall network structure. Measures of network segregation show similarities between CIS-ON and CIS-nON and between HC and NMOSD, particularly in higher regions, as do efficiency parameters.

Conclusions The internal structure and efficiency appear to be more affected by disease type, with similarities between both CIS types and between NMOSD and HC, particularly in higher regions. The overall structure of the visual network, however, appears to change according to disability, and so when damage occurs in the visual system (NMOSD, CIS-ON), attempted compensation takes place, which is not seen when other systems are damaged (CIS-nON). Therefore, we suggest, that compensatory mechanisms are dependent on disability rather than disease.

Authors/Disclosures
PRESENTER	No disclosure on file
Friedemann Paul (Charite Universitatsmedizin in Berlin)	Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Hexal. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Alexion. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Merck. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Hexal. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Hoffmann-La Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Merck. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Bristol-Myers Squibb GmbH & Co. KGaA (BMS. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Hexal. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Merck. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Novartis. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Teva. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Horizon Therapeutics GmbH. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Hexal. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche. Dr. Paul has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for UCB. Dr. Paul has received personal compensation in the range of $5,000-$9,999 for serving as a Consultant for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as a Consultant for Roche. Dr. Paul has received personal compensation in the range of $10,000-$49,999 for serving as a Consultant for UCB. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Alexion. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for sanofi. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Scientific Advisory or Data Safety Monitoring board for Roche . Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for F&U Confirm. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Novartis. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Alexion. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Bristol Myers Squibb GesmbH. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for MICE Service. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Alexion. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Novartis. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Novartis. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Alexion. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Biogen. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Amgen. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Sanofi. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for VINDICO medical education. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Amgen. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for UCB. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Sanofi. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Beijing Novartis. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Sandoz Internation GmbH. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Amgen. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Alexion. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Novartis. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche Thailand. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Roche . Dr. Paul has received personal compensation in the range of $500-$4,999 for serving on a Speakers Bureau for Alexion. Dr. Paul has received personal compensation in the range of $500-$4,999 for serving as an Editor, Associate Editor, or Editorial Advisory Board Member for Neurology, Neuroimmunology&Neuroinflammation.
Netta Levin, MD, PhD (Hadassah Hebrew University Hospital)	Dr. Levin has nothing to disclose.

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