Atypical anticipatory postural adjustments during gait initiation among individuals with sub-acute stroke
| Autor: | Avril Mansfield, Karen Brunton, Roshanth Rajachandrakumar, Julia Fraser, Alison Schinkel-Ivy, Elizabeth L. Inness, Lou Biasin, William E. McIlroy |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Male
030506 rehabilitation medicine.medical_specialty medicine.medical_treatment Population Biophysics Walking Article 03 medical and health sciences 0302 clinical medicine Physical medicine and rehabilitation medicine Humans Orthopedics and Sports Medicine Force platform Gait initiation education Stroke Gait Postural Balance Gait Disorders Neurologic Aged education.field_of_study Rehabilitation medicine.disease Displacement (psychology) Preferred walking speed Physical therapy Female 0305 other medical science Psychology 030217 neurology & neurosurgery |
| Zdroj: | Gaitposture. 52 |
| ISSN: | 1879-2219 |
| Popis: | Anticipatory postural adjustments, executed prior to gait initiation, help preserve lateral stability when stepping. Atypical patterns of anticipatory activity prior to gait initiation may occur in individuals with unilateral impairment (e.g., stroke). This study aimed to determine the prevalence, correlates, and consequences of atypical anticipatory postural adjustment patterns prior to gait initiation in a sub-acute stroke population. Forty independently-ambulatory individuals with sub-acute stroke stood on two force plates and initiated gait at a self-selected speed. Medio-lateral centre of pressure displacement was calculated and used to define anticipatory postural adjustments (shift in medio-lateral centre of pressure >10 mm from baseline). Stroke severity, motor recovery, and functional balance and mobility status were also obtained. Three patterns were identified: single (typical), absent (atypical), and multiple (atypical) anticipatory postural adjustments. Thirty-five percent of trials had atypical anticipatory postural adjustments (absent and multiple). Frequency of absent anticipatory postural adjustments was negatively correlated with walking speed. Multiple anticipatory postural adjustments were more prevalent when leading with the non-paretic than the paretic limb. Trials with multiple anticipatory postural adjustments had longer duration of anticipatory postural adjustment and time to foot-off, and shorter unloading time than trials with single anticipatory postural adjustments. A high prevalence of atypical anticipatory control prior to gait initiation was found in individuals with stroke. Temporal differences were identified with multiple anticipatory postural adjustments, indicating altered gait initiation. These findings provide insight into postural control during gait initiation in individuals with sub-acute stroke, and may inform interventions to improve ambulation in this population. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect