Infants with congenital muscular torticollis (CMT) display postural and functional asymmetry
that interferes with their development. The use of the Perception-Action Approach (P-AA)
intervention in infants with CMT is supported by a single case report and needs to be
researched further to determine its efficacy. This study will investigate the immediate
effects of the P-AA intervention on habitual head deviation from midline, active head
rotation range of motion, and functional use of both sides of the body in infants with CMT.
The participants will be 3 infants with CMT, aged birth to 9 months. A randomized,
nonconcurrent A-B multiple baseline design across subjects will be used. The intervention
phase will include 5 daily PT sessions, with outcome data collected at the end of each
It is hypothesized that improvements on all outcome measures will be documented upon the
initiation of the P-A Approach intervention, with the most substantial change expected in
habitual head deviation from midline measured by still photography.