Investigation of Shoulder Position, Upper Extremity Proprioception, and Function in Adolescents With Idiopathic Scoliosis Using Braces

Adolescent idiopathic scoliosis (AIS) is a complex three-dimensional spinal deformity characterized by lateral curvature and vertebral rotation, affecting postural alignment, musculoskeletal function, and neuromuscular control. AIS can lead to asymmetrical loading of the spine and trunk, potentially altering proprioception, postural stability, and functional capacity. Bracing is a widely used conservative treatment aimed at preventing curve progression and maintaining spinal alignment during skeletal growth. However, its effects on upper extremity function, proprioception, and shoulder biomechanics remain underexplored.

Proprioception, the body's ability to sense movement and position, plays a critical role in motor control and stability. In AIS, spinal asymmetry and altered postural alignment may disrupt proprioceptive feedback mechanisms, leading to compensatory movement strategies and potential impairments in upper extremity coordination and function. Additionally, bracing may impose external constraints that influence neuromuscular activation patterns and joint positioning, further affecting movement efficiency and functional performance.

This study aims to investigate the impact of brace use on shoulder position, upper extremity proprioception, and functional performance in adolescents with idiopathic scoliosis. Participants will be assessed in both braced and unbraced conditions to determine how brace-related mechanical constraints influence proprioceptive accuracy, postural adaptation, and functional motor skills. Shoulder position will be analyzed through photographic assessment, while proprioception will be measured using the Laser Pointer-Assisted Angle Reproduction Test. Upper extremity function will be evaluated using standardized clinical assessments, including strength tests, stability and coordination measures, and reaction time assessments.

Understanding the effects of bracing on upper extremity proprioception and function is essential for optimizing rehabilitation strategies in AIS. This study seeks to provide evidence that can inform clinical decision-making regarding brace design, therapy interventions, and functional training approaches to minimize movement restrictions and enhance musculoskeletal performance in adolescents undergoing brace treatment.

Inclusion criteria

• Inclusion criteria for the patient group;

• To have a diagnosis of adolescent idiopathic scoliosis (AIS),
• Be using Cheneau Type corset for at least one month,
• Having a primary thoracic or thoracolumbar curve,
• Cobb angle of 20 degrees or more,
• The dominant hand is the right hand,
• Volunteering to participate in the study,
• Parental consent was required. Inclusion criteria for the control group;
• Individuals between the ages of 10-18
• Dominant Hand is the Right Hand
• Volunteering to Participate in the Study

Exclusion criteria

Exclusion criteria

for Patient Group;

• Having a diagnosis of Congenital Scoliosis,
• Becoming a Professional Athlete,
• Neuromuscular, Rheumatologic, Renal Except Scoliosis, Any History of Vestibular, Pulmonary or Cardiovascular Disease Finding
• History of Surgical Intervention on the Spine. Exclusion Criteria for Control Group;
• Neuromuscular, Rheumatologic, Renal, Vestibular, Pulmonary Or History of any Cardiovascular Disease
• History of Spine Surgery,
• Being a Professional Athlete.