Retraction movement refers to the posterior movement of a body part. More specifically, it often describes the movement of the scapula (shoulder blade) towards the spine.
Scapular Retraction
When discussing the upper body, retraction most commonly refers to scapular retraction. This involves the following:
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Definition: The movement of the scapula medially (towards the spine) on the posterior thoracic wall (back of the rib cage). This action pulls the shoulder region backward.
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Muscles Involved: The primary muscles responsible for scapular retraction are the rhomboids (major and minor) and the trapezius (middle fibers).
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Example: Squeezing your shoulder blades together is a classic example of scapular retraction. Think about pinching something between your shoulder blades. This is often performed during exercises to strengthen the back and improve posture. It's a key component of actions like rowing.
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Importance: Proper scapular retraction is important for:
- Posture: Helps maintain an upright posture and prevent rounded shoulders.
- Shoulder Health: Provides stability to the shoulder joint and reduces the risk of injury.
- Strength Training: Enables efficient force transfer during upper body exercises.
Other Examples of Retraction
While most commonly associated with the scapula, "retraction" can also refer to other body parts moving posteriorly.
- Mandibular Retraction (Jaw): Moving the jaw backward. This is the opposite of protraction, where the jaw moves forward.
In summary, while the term "retraction" can be applied to various body parts, it most commonly refers to the movement of the scapula towards the spine.
