Freehand Ultrasound to Evaluate Scapular Kinematics in People With Paraplegia
Spinal Cord InjuriesShoulder Impingement SyndromeShoulder pain is very common in people with spinal cord injury (SCI). Persons with high-level paraplegia have higher chances to suffer shoulder pain and injury than those with lower-level paraplegia due to the shoulder muscle imbalance. As people with SCI overuse the shoulder during routine daily activities, the onset of pain or injury lead to increased healthcare expenses, limitation in activity, depression, decreased participation, and reduced quality of life. One of the main reasons of shoulder pain is believed to have a altered scapular movement. To clarify the mechanism of the shoulder pain and injury, comprehensive understanding of three-dimensional scapular kinematics is required. Ultrasound is a low-cost and non-invasive imaging system and has been used to diagnose the shoulder pain and injury in individuals with SCI. A freehand ultrasound (FUS) combining ultrasound with motion capture system to evaluate scapular movement was developed and presented favorable results in able-bodied population. The purpose of this study is to compare the FUS and widely used skin-based method against a radiographic based gold standard in people with paraplegia, and to elucidate the relationship among scapular movement and shoulder pain, pathology. This study will also allow us to gain more understanding of how level of injury influences the scapular behavior during functional activities. The investigators believe more severe shoulder pain and pathology will be associated with greater abnormal scapular movement. The investigators also believe that people with high-level paraplegia will have greater scapular abnormality than people with low-level paraplegia during arm elevation and weight relief raise tasks. By completing this study, the investigators will expect to deliver a reliable and valid tool to evaluate scapular movement and gain a better understanding how the altered scapular movement is related to shoulder pain and pathology. The investigators will also learn how the level of injury affects the scapular behavior during functional activities. The results of this study may help the shoulder pain management leading to the improvement in the quality of life of individuals with SCI.
Adjusting Wheelchair Set-Up to Minimize Shoulder Joint Forces During Propulsion
ParaplegiaUpper Limb PainIndividuals who use a manual wheelchair depend upon their upper limbs to provide a means of locomotion during completion of their activities of daily living. As a result of greater than normal usage of the upper limbs, shoulder pain and pathology is common among manual wheelchair users. Accordingly, proper wheelchair set-up may be paramount to preventing injuries and maintaining comfort during locomotion. The purpose of this research study is to create a subject-specific computer model of wheelchair propulsion to provide information on wheelchair set-up (in particular, axle placement). The primary objective of this study is to investigate the effect of wheelchair set-up on shoulder joint forces during wheelchair propulsion; the secondary objective is to develop a predictive model to identify differences in shoulder joint forces that result from altering the axle position and seating set-up in user's wheelchairs. The hypothesis of the study is that outputs from a patient-specific model will reveal that the current axle position for each subject results in peak shoulder joint forces that are greater than those predicted from an altered axle position (determined by the model). The overall goal is to then adjust each manual wheelchair user's axle placement to one that minimizes the magnitude of shoulder joint forces throughout propulsion. It is intended that in doing so, the repetitive strain injuries associated with manual wheelchair propulsion may be reduced, prolonging a pain-free way of life for this population.
Body Composition Assessment in Spinal Cord Injury
Diabetes MellitusBody Composition3 moreThe purpose of this research is to evaluate different methods of measuring body composition (amount of fat, muscle, bone, and water in your body) and to determine relationships between body composition and other medical problems associated with spinal cord injury (SCI).
SPATAX: Clinical and Genetic Analysis of Cerebellar Ataxias and Spastic Paraplegias
Cerebellar AtaxiasSpastic ParaplegiasCerebellar ataxias (CA) and spastic paraplegias (SP) are genetically and clinically very heterogeneous. More than 40 loci are already known but the number of phenotypes is even greater suggesting further genetic heterogeneity. These progressive disorders are often severe and fatal, due to the absence of specific therapy. The SPATAX network combines the experience of European clinicians and scientists working on these groups of diseases. Over the past year, they have assembled the largest collection of families and achieved a number of tasks (initiation of a clinical and genetic database, distribution of DNA to participating laboratories, mapping of three new loci, and refinement of several loci). In addition to clinicians from Europe and Mediterranean countries, who play a major role in collecting families according to evaluation tools developed and validated by the SPATAX members, the group includes major European laboratories devoted to the elucidation of the molecular basis of these disorders. Each laboratory will centralize all families with a subtype of autosomal recessive (AR) CA (n=116) or SP (n=207) in order to efficiently map and identify the responsible gene(s). Genome-wide scans are already underway in 61 families. Given the expertise of the participants, the researchers expect to map and identify several genes during the course of this project. The spectrum of mutations and phenotype/genotype correlations will be analysed thanks to this unique series of patients with various phenotypes. The knowledge gained will be immediately applicable to patients in terms of improved positive diagnosis, follow-up and appropriate genetic counselling. In the long term, models for genetic entity will be developed in order to understand the pathophysiology and to identify new targets for treatment. The series of patients assembled and the precise knowledge of natural history will facilitate the implantation of therapeutic trials based on rational approaches.