Speed and Rhythm Affect Temporal Structure of Variability in Reaching Poststroke: A Pilot Study |
| |
| Authors: | Amit Sethi Nick Stergiou Tara S Patterson Carolynn Patten Lorie G Richards |
| |
| Institution: | 1. Department of Occupational Therapy, School of Health and Rehabilitation Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania;2. Health Physical Education and Recreation, University of Nebraska at Omaha, Omaha, Nebraska;3. Occupational Therapy, University of Texas Medical Branch, Galveston, Texas;4. North Florida/South Georgia VA Health System, Brain Rehabilitation Research Center, Gainesville, Florida;5. Occupational Therapy, University of Utah, Salt Lake City, Utah |
| |
| Abstract: | Temporal structure reveals the potential adaptive strategies employed during upper extremity movements. The authors compared the temporal structure of upper extremity joints under 3 different reaching conditions: preferred speed, fast speed, and reaching with rhythmic auditory cues in 10 individuals poststroke. They also investigated the temporal structure of these 3 reaching conditions in 8 healthy controls to aid in the interpretation of the observed patterns in the poststroke cohort. Approximate entropy (ApEn) was used to measure the temporal structure of the upper extremity joints. ApEn was similar between conditions in controls. After stroke, ApEn was significantly higher for shoulder, elbow, and wrist both at fast speed and with rhythmic cues compared with preferred speed. ApEn at index finger was significantly higher only with rhythmic cues compared with preferred speed. The authors propose that practice reaching at faster speed and with rhythmic cues as a component of rehabilitation interventions may enhance adaptability after stroke. |
| |
| Keywords: | nonlinear rhythm stroke temporal structure upper extremity |
|
|
