Abduction
Abduction is the movement of a body part away from the body’s midline. This movement commonly occurs at the shoulder, hip, fingers, and thumb. For example, lifting your arm sideways away from your body or moving your leg outward are common examples of abduction. Physiotherapists assess this movement to understand joint mobility, muscle function, and movement quality during physical examinations.
Clinical Importance
Normal abduction is essential for many everyday activities, including reaching overhead, dressing, lifting objects, and maintaining balance. Painful or restricted movement may indicate muscle weakness, joint stiffness, nerve injuries, or musculoskeletal disorders. Comparing the range of movement on both sides helps clinicians identify impairments and monitor rehabilitation progress.
Physiotherapy Relevance
Physiotherapists evaluate abduction using range of motion measurements, manual muscle testing, and functional movement assessments. Based on the findings, they may prescribe strengthening exercises, stretching, manual therapy, and movement retraining to restore normal function and improve independence during daily activities.
Everyday Examples
You use abduction during many daily tasks, including:
- Raising your arm to comb your hair.
- Moving your leg sideways during exercise.
- Spreading your fingers while typing.
- Moving your thumb away from your palm to hold a large object.
These movements help you perform routine activities efficiently.
Quick Facts
| Feature | Details |
|---|---|
| Category | Joint Movement |
| Direction | Away from the body’s midline |
| Common Joints | Shoulder, Hip, Fingers |
| Plane of Movement | Frontal (Coronal) Plane |
| Axis of Movement | Anteroposterior (Sagittal) Axis |
| Common Assessment Tool | Goniometer |
Clinical Pearl
The supraspinatus initiates the first 15° of shoulder abduction, while the middle deltoid performs most of the movement beyond this range. Difficulty initiating abduction may indicate supraspinatus dysfunction or a rotator cuff injury.
Frequently Asked Questions
What is the opposite of abduction?
The opposite movement is adduction, which moves a body part toward the body’s midline.
Which joints commonly perform abduction?
The shoulder, hip, fingers, thumb, and wrist perform abduction, although the movement varies depending on the joint.