Upward Rotation (Scapula)
Upward Rotation (Scapula): A joint action of the scapula (shoulder blades) where the inferior angle moves upward and outward, causing the glenoid fossa (shoulder socket) to tilt upward. Upward rotation helps in positioning the scapula and glenoid fossa so the arm can achieve a full range of motion when lifting overhead, as seen during a shoulder press .
- Opposing Joint Action: Scapular Downward Rotation
- Plane of Motion: Frontal
- Direction Bias: Rotation like the hands of a clock, up and out. (When facing someone's back, the right side would rotate counter-clockwise, and the left side would rotate clockwise).
- Note: Joint actions may be referred to as "osteokinematic motions" or "osteokinematic joint actions" to differentiate them from "arthrokinematic motions " (e.g., spin, glide, roll, compression, and distraction).
For more (including a video lecture), check out:
Joints that Perform Scapular Protraction (and Sample Exercises):
- Scapulothoracic Joint (Shoulder Girdle): Scapula upward rotation occurs around a sagittal axis in rotational motion parallel to the posterior aspect of the ribs. This action may be observed during during lateral raises, scaption , and shoulder press .