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Updated: Jun 10, 2026

Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
Published on: September 18, 2020
Refinement, reliability, and validity of the segmental assessment of trunk control
Penelope B Butler1, Sandy Saavedra, Madeline Sofranac
1The Movement Centre, Robert Jones and Agnes Hunt Hospital, Oswestry, Shropshire, UK. pennybutler@the-movement-centre.co.uk
Purpose:
The Segmental Assessment of Trunk Control (SATCo) provides a systematic method of assessing discrete levels of trunk control in children with motor disabilities. This study refined the assessment method and examined reliability and validity of the SATCo.
Methods:
After refining guidelines, 102 video recordings of the SATCo were made of 8 infants with typical development followed longitudinally from 3 to 9 months of age and 24 children with neuromotor disability with a mean age of 10 years 4 months. Eight researchers independently scored recordings.
Results:
Intraclass correlation coefficient values for interrater reliability were more than 0.84 and 0.98 across all data sets and all aspects of control. Tests of concurrent validity with the Alberta Infant Motor Scales resulted in coefficients ranging from 0.86 to 0.88.
Conclusion:
The SATCo is a reliable and valid measure allowing clinicians greater specificity in assessing trunk control.
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