###### Abstract  
The validity and reliability of the Lower Extremity Motor Coordination Test (LEMOCOT) were assessed in patients with multiple sclerosis (MS). The study involved 60 participants diagnosed with MS (mean age: 48.13 years, range: 24-80 years). Intra-rater reliability was assessed within-day (\(n=12\)), and inter-rater reliability was assessed within-day (\(n=45\)) and between-days (\(n=22\)). For known-groups validity, test scores were compared between participants of different sexes; for convergent validity, test scores were correlated with age, the Five-Repetition Sit-to-Stand test (FSTS), the Berg Balance Scale (BBS), the Lower Extremity Functional Scale (LEFS), and the Expanded Disability Status Scale (EDSS). To test the discriminant validity, the LEMOCOT test scores were correlated with the Mini-Mental State Evaluation (MMSE) and compared according to social history (living alone or not). The LEMOCOT test was tested under three different conditions and found to be very reliable (intraclass correlation coefficient, ICC\({}_{2,1}>0.94\)) with an acceptable error level (standard error of the measurement, SEM, between 1.39 and 3.47 targets and 95% minimum detectable change; MDC\({}_{95\%}\), between 3.84 and 9.58 targets). Convergent validity was verified, as the LEMOCOT registered very strong correlations with the FSTS test (r \(=-0.851\)) and the BBS scale (r \(=0.815\)), a strong correlation with the LEFSC scale (r \(=0.78\)), a moderate correlation with the EDSS scale (r \(=-0.634\)), all highly significant (\(p<0.001\)), and a weak correlation with age (r \(=-0.332\), \(p<0.01\)). Discriminant validity was also confirmed, as the LEMOCOT demonstrated a weak correlation with the MMSE scale (r \(=0.365\), \(p=0.017\)) and no differences relative to living environment or sex. The LEMOCOT demonstrated excellent reliability and validity for patients with MS.  
Lower Extremity Motor Coordination Test (LEMOCOT); reliability; validity; psychometric properties; multiple sclerosis; coordination 2024  
D.Zarbouti, D.  
gait disturbance and falls as a consequence, are some of the clinical characteristics of the disease [6; 7; 8; 9]. In this population group, the strength is reduced in the LLs compared to healthy individuals, which makes the deficit even more pronounced when the muscle contractions are performed at a higher speed [10; 11]. During walking, it is necessary to have correct motor coordination of the body parts, as well as precise positioning of the foot during the support phase, and to be able to respond to internal and external stimuli, resulting in detailed positioning of the foot during walking and thus ensuring safe movement and avoiding falls [12]. Therefore, the existence of an appropriate evaluation of the coordination of the movement of the LLs with valid and reliable tools is a very important factor for the rehabilitation of patients with neurological gait disorders [13; 14; 15]. One of the tests to evaluate motor coordination is the Lower Extremity Motor Coordination Test (LEMOCOT) [12; 13; 14; 16]. The LEMOCOT has been used and is a reliable and valid test for the motor coordination of LL in patients with stroke [14; 16] and Autosomal Recessive Spastic Charlevoix-Saguenay (ARSACS) [17]. It is also one of the best prognostic indicators of social participation after stroke rehabilitation, with a program of intensive functional intervention lasting 6 months, or for any changes in the coordination of movements during the patient's stay in an intensive care unit [14; 18]. Furthermore, it is used for the assessment of rehabilitation in elderly people with LL impairment, as well as after surgery to assess the speed of recovery [19]. The LEMOCOT has been used as a clinical tool to evaluate the motor coordination of LLs in patients with MS [14; 15; 16]. It assesses the ability of individuals to perform controlled, precise, rapid, and repetitive movements, taking into account the speed as well as the quality of the movement. The LEMOCOT evaluates and quantifies the quality of movement.