Spastic muscles in the pathological motor patterns may change at different ages that leads to the changes in anti-spastic treatment.

OBJECTIVE

To study the specific patterns of spasticity in CP patients with level III according to the Gross Motor Function Classification System (GMFCS) in different age periods.

MATERIAL AND METHODS

A retrospective analysis of injection protocols of Abobotulinum toxin A for 99 patients with bilateral spastic CP GMFCS III at the age of 2 to 12 years was performed. Spasticity patterns were evaluated according to the frequency of target muscle selection for the botulinum toxin A (Abobotulinum toxin A) injections.

RESULTS

The equinus foot deformity (89.7%, 95%CI 72.8—97.2) and its combination with internal hip rotation (79.3%, 95% CI 61.3—90.5) and/or hip adduction (65.5%, 95% CI 47.3—80.2) were the main lower extremity spasticity pattern for the patients aged 2 to 4 years. Between 4 and 6 years, there was the decrease in injections to the gastrocnemius muscle (75%, 95% CI 52.8—89.2), and less to the m. gracilis (70%, 95% CI 47.9—85.7) and hip adductors (55% 95 CI 34.2—74.2). In the 6—12 year old patients, the predominant spasticity patterns were internal hip rotation (80%, 95% CI 66.8—88.9), adduction (54%, 95% CI 40.4—67.0) and knee flexion (66%, 95% CI 52.1—77.6). The leading upper extremity patterns at all observed ages were forearm pronation (70.7%, 95% CI 61.1—78.8) and elbow flexion (47.5%, 95% CI 37.9—57.2). The frequency of injections to these muscles slightly decreased in elder groups.

CONCLUSIONS

CP GMFCS III patients demonstrate age-related changes of the spasticity patterns both in lower and upper extremities. These changes and typical spastic muscles should be taken into account during the rehabilitation and botulinum toxin treatment planning, as well as in the detection and prevention of the orthopaedic complications.