Articles by Pierre K. Asselin in JoVE
Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton Pierre K. Asselin1, Manuel Avedissian1, Steven Knezevic1, Stephen Kornfeld2, Ann M. Spungen1 1Department of Veterans Affairs (VA) Rehabilitation Research and Development National Center of Excellence for the Medical Consequences of Spinal Cord Injury, James J. Peters VA Medical Center, 2Department of Veterans Affairs (VA) Spinal Cord Injury Service, James J. Peters VA Medical Center Training a person with paralysis to ambulate using a powered exoskeleton may present challenges. The goals are to present the candidate selection criteria and the training procedures for exoskeletal-assisted walking and other mobility skills that can be progressed as the participant's skill level improves.
Other articles by Pierre K. Asselin on PubMed
Adaptation of Computerized Posturography to Assess Seated Balance in Persons with Spinal Cord Injury The Journal of Spinal Cord Medicine. Mar, 2013 | Pubmed ID: 23809527 The ability to retain or improve seated balance function after spinal cord injury (SCI) may mean the difference between independence and requiring assistance for basic activities of daily living. Compared with assessments of standing and walking balance, seated balance assessments remain relatively underemphasized and under-utilized.
Acute Changes in Soleus H-reflex Facilitation and Central Motor Conduction After Targeted Physical Exercises Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology. Jun, 2015 | Pubmed ID: 25771437 We tested the acute effect of exercises targeted simultaneously at cortical and brainstem circuits on neural transmission through corticobulbar connections. Corticobulbar pathways represent a potential target for rehabilitation after spinal cord injury (SCI), which tends to spare brainstem circuits to a greater degree than cortical circuits. To explore this concept, able-bodied volunteers (n=20) underwent one session each of three exercises targeted at different nervous system components: treadmill walking (spinal locomotor circuits), isolated balance exercise (brainstem and other pathways), and multimodal balance plus skilled hand exercise (hand motor cortex and corticospinal tract). We found that short-interval soleus H-reflex facilitation increased after one session of balance and multimodal exercise by 13.2±4.0% and 8.3±4.7%, and slightly decreased by 1.9±4.4% after treadmill exercise (p=0.042 on ANOVA across exercise type). Increases in long-interval H-reflex facilitation were not significantly different between exercises. Both balance and multimodal exercise increased central motor conduction velocity by 4.3±2.6% and 4.5±2.8%, whereas velocity decreased by 4.3±2.7% after treadmill exercise (p=0.045 on ANOVA across exercise type). In conclusion, electrophysiological transmission between the motor cortex and spinal motor neurons in able-bodied subjects increased more following one session of balance exercise than treadmill exercise.