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7 Σεπ 2024 · Protraction & Retraction. Protraction describes the anterolateral movement of the scapula on the thoracic wall that allows the shoulder to move anteriorly. In practice, this is the movement of ‘reaching out’ to something.
In the limbs, flexion decreases the angle between the bones (bending of the joint), while extension increases the angle and straightens the joint. For the upper limb, all anterior motions are flexion and all posterior motions are extension.
20 Ιουλ 2023 · Flexion, or bending, involves decreasing the angle between the two entities taking part in the movement (bones or body parts). In contrast, extension , or straightening, involves increasing the respective angle.
24 Μαρ 2019 · Protraction and retraction occur in two major regions of the body – the scapula and the mandible. Protraction refers to protruding or sticking out. Retraction refers to bringing together.
25 Σεπ 2024 · Flexion and extension are movements that take place within the sagittal plane and involve anterior or posterior movements of the trunk or limbs. In the limbs, flexion decreases the angle between the bones (bending of the joint), while extension increases the angle and straightens the joint.
For the vertebral column, flexion (anterior flexion) is an anterior (forward) bending of the neck or body, while extension involves a posterior-directed motion, such as straightening from a flexed position or bending backward.
Flexion describes a bending movement that decreases the angle between a segment and its proximal segment. Extension is the opposite of flexion, describing a straightening movement that increases the angle between body parts