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### 18 Cards in this Set

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 Identify the structures that make up the shoulder girdle. articulations btw scapula & clavicle Identify the structures that make up the shoulder joint. scapula & humerus Identify the structures that make up the shoulder complex. Scapula Clavicle Humerus Sternum Rib Cage *(SCHSR) When is the scapula is in upward rotation? when it moves away from the vertebral column, is scapular upward rotation When is the scapula in downward rotation? when it moves toward the vertebral column, is scapular downward rotation Given that the scapula is shaped somewhat like a triangle: *What direction is the landmark moving if the scapula is rotating upwardly? *when it moves away from the vertebral column, is scapular upward rotation *when it moves toward the vertebral column, is scapular downward rotation Given that the scapula is shaped somewhat like a triangle: *What landmark is commonly used to determine the direction the scapula is rotating? inferior angle is point of reference Which shoulder girdle motions are most linear? elevation/depression & protraction/retraction are more linear Which shoulder girdle motions are most angular? upward & downward rotation are more angular What is the scapulohumeral rhythm? scapulohumeral rhythm is the movement rltp btw shoulder girdle & shoulder joint ___________________ After the first 30 degrees: 1) 4 every 2 degrees of shoulder joint flexion or abduction 2) shoulder girdle rotates up 1 degree What is this called? After the first 30 degrees: 1) 4 every 2 degrees of shoulder joint flexion or abduction 2) shoulder girdle rotates up 1 degree scapulohumeral rhythm How is the shoulder joint motion affected by the absence of scapulohumeral rhythm? without shoulder girdle movement: once cannot normally and completely raise the arm above the head The trapezius muscle is usually referred to & described as consisting of three different muscles. The 2 rhomboid muscles (major & minor) are referred to and described as one. From a functional perspective: *Why is the trapezius muscle separated into 3 muscles?* b/c the 3 different attachments of the trap muscle produce 3 different muscle ctions The trapezius muscle is usually referred to & described as consisting of three different muscles. The 2 rhomboid muscles (major & minor) are referred to and described as one. From a functional perspective: *Why are the rhomboid muscles described as one muscle?* rhomboid muscles (unlike the traps) have the same line of pull & thus the same muscle action *there is no functional difference btw the 2* Raising your hand over your head requires the combined action of which three shoulder girdle motions? 1) serratus anterior 2) upper trapezius 3) lower trapezius Name and define the biomechanical term used to describe that combined action in raising your hand over your head (which combines 3 shoulder girdle motions). force couple: a situation in which 2 or more muscles pull in different, often opposite, directions to accomplish the same motion Starting at the inferior angle & going clockwise, name the shoulder girdle muscles that attach to the posterior surface of the scapula. rhomboid muscles, the lower and middle trapezius muscles, the levator scapula muscle, & the upper trapezius muscle What is a force couple? force couple: a situation in which 2 or more muscles pull in different, often opposite, directions to accomplish the same motion