de Jong LD, Hoonhorst MH, Stuive 1, Dijkstra PU. Arm motor control as predictor for hypertonia after stroke: a prospective cohort study. Arch Phys Med Rehabil 2011;92:1411-7.
Objectives: To analyze the development of hypertonia in the hemiparetic elbow flexors, and to explore the predictive value of arm motor control on hypertonia in a cohort of first-ever stroke survivors in the first 6 months poststroke.
Design: A prospective cohort study.
Setting: A cohort of stroke survivors from a large, university-affiliated hospital in The Netherlands.
Participants: Patients (N=50) with first-time ischemic strokes and initial arm paralysis who were admitted to a stroke unit.
Interventions: Not applicable.
Main Outcome Measures: At 48 hours, 10 to 12 days, 3 and 6 months poststroke, hypertonia and arm motor control were assessed using the Modified Ashworth Scale and the Fugl-Meyer Assessment arm score.
Results: The incidence rate of hypertonia reached its maximum before the third month poststroke (30%). Prevalence was 42% at 3 and 6 months. Participants with poor arm motor control at 48 hours poststroke were 13 times more likely to develop hypertonia in the first 6 months poststroke than those with moderate to good arm motor control. These results were not confounded by the amount of arm function training received.
Conclusions: Hypertonia develops in a large proportion of patients with stroke, predominantly within the first 3 months poststroke. Poor arm motor control is a risk factor for the development of hypertonia.
- Muscle hypertonia
- Risk factors
- Upper extremity
- MODIFIED ASHWORTH SCALE
- POSTSTROKE SPASTICITY
- 1ST-EVER STROKE