Language and Cognitive Impairments in Multiple Sclerosis: a Comparative Study of RRMS and SPMS Patients

Objective: Previous studies have reported that patients with Multiple Sclerosis (MS) face cognitive difficulties. Much less, however, is known about their language abilities. The present study aims to provide a clear view of the language abilities of adults with MS, considering their cognitive skills and the type of the disorder. Method: Specifically, 20 patients with Relapsing-Remitting MS, 17 patients with Secondary Progressive MS, and two healthy control groups demographically matched with the clinical groups, took part in the study. Their language abilities were examined using the Adult Language Abilities Test, which explores morpho-syntactic and semantic phenomena of the Greek language in both comprehension and production modes. Results: Our results did not reveal statistically significant differences between the two clinical groups on any cognitive or language subtest. Both groups, however, performed poorer than the control groups in producing the correct form of verbs, possessive and weak personal pronouns, and in comprehending relative and passive clauses. Participants' performance in morphosyntax was found to be related to their processing speed. Conclusion: Mapping the cognitive and language abilities of patients with MS is crucial for designing effective targeted interventions, which can help them adopt strategies to manage their specific cognitive and language symptoms.