Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DiNOGMI, University of Genoa, Italy.

Author Of 1 Presentation

Neuropsychology and Cognition Poster Presentation

P0788 - Atrophy of the posterior cerebellar lobules is related to episodic memory difficulties in patients with multiple sclerosis: a 3T MRI study. (ID 1299)

Speakers
Presentation Number
P0788
Presentation Topic
Neuropsychology and Cognition

Abstract

Background

Cerebellar pathology is associated with worse cognitive performances in patients with multiple sclerosis (MS), but the structural correlates (in terms of single cerebellar lobules) of different cognitive domains (processing speed, episodic memory and visuospatial memory) are still unknown.

Objectives

To investigate the association of specific cerebellar lobules with impairment in different cognitive domains in MS.

Methods

Patients underwent 3T brain MRI (Siemens,Prisma) and neuropsychological evaluation with assessment of the Symbol Digit Modalities Test (SDMT), the California Verbal Learning Test (CVLT) and the Brief Visuospatial Memory Test (BVMT). 1x1x1mm T1-weighted images were used for cerebral and cerebellar segmentation. MS lesions were manually segmented on T1 and T2 weighted images.

Results

We included 70 pts [58(82.9%) with relapsing-remitting MS]; 52 females (74.3%), mean age 42.9(±11.1) years] with a mean disease duration of 12.4(± 10.1) years and a median (IQR) baseline EDSS of 2.5(1-4). Mean SDMT score was 54.3(±13.7), mean CVLT score was 57.9(±11.5) and mean BVMT score was 28.4(±6.5). Mean brain T2 lesion volume (LV) was 12,2(±12.3) mL, mean brain T1LV was 7.9(±9.0) mL, mean cerebellar T1LV and cerebellar T2LV were 0.2(±0.3) and 0.3(±0.5), respectively. 53(75.7%) pts had at least one cerebellar MS lesion. Mean normalized brain volume (NBV) was 1389(±131) mL and mean normalized grey matter volume (NGMV) was 602(±70) mL. Correlations were found between volumes of the posterior lobe of the cerebellum, lobule VIIIa, VIIIb, IX and X and CVLT scores (0.24<r<0.29, 0.015<p<0.046), with additional correlations of lobule X with BVMT values (r=0.29, p=0.016). Correlations were found between CVLT and BVMT scores and cerebellar T2 and T1LV (-0.29<r<-0.27, 0.017<p<0.024), but not with brain T2 and T1LV. NGMV was associated with SDMT score (r=0.26, p=0.032), but not with CVLT and BVMT scores. At multivariate analyses, accounting for the effects of age, sex, NGMV and cerebellar T2LV, atrophy of the posterior portion of the cerebellum was independently associated with worse performance at CVLT (p=0.038,B=0.19).

Conclusions

Atrophy of the cerebellar lobules VIIIa, VIIIb, IX and X is independently associated with episodic memory difficulties in MS patients, while processing speed seems to relate mostly to brain pathology.

Collapse