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Shoulder Complex Muscle Analysis Assignment
| 1. Muscle analysis chart·Shoulder girdle and shoulder joint
Complete the muscle analysis chart by listing the muscles primarily involved in each movement. |
|
| Shoulder girdle | Shoulder joint |
| Upward rotation | Abduction |
| Downward rotation | Adduction
|
| Depression
|
Extension |
| Elevation
|
Flexion
|
| Abduction
|
Horizontal adduction |
| Internal rotation | |
| Adduction
|
Horizontal abduction |
| External rotation | |
- Lie prone on a table with your right arm hanging over the side of the table holding a weight in your right hand. Using only shoulder girdle motion and no shoulder joint motion, pull the weight straight up from the floor.
- What join action is occurring at the shoulder girdle?
- What muscles are prime movers of this action?
- Is this an open-chained or closed-chained activity?
- Lie in the same position, holding a weight, move your arm up and out by doing shoulder horizontal abduction.
- What shoulder girdle motion is accompanying shoulder horizontal abduction?
- What muscles are the prime movers in this shoulder girdle motion?
- Is this a concentric, eccentric, or isometric contraction?
- Using a lat pull down machine reach up and grasp the handles. Pull-down while keeping your arms moving in the frontal plane.
- What shoulder girdle motions are accompanying shoulder adduction and lateral rotation?
- What muscles are the prime movers in these shoulder girdle motions?
- Is this a concentric or eccentric activity?
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