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60 Cards in this Set
- Front
- Back
bones
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scapula clavicle sternum humerus rib cage |
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joints
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sternoclavicular acromioclavicular glenohumeral scapulothoracic functional articulation |
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shoulder girdle
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scapula and clavicle
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shoulder joint
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between glenoid fossa of scapula and head of humerus
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only direct attachment of upper extremity to the trunk
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sternoclavicular
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sternoclavicular accompany shoulder girdle motions
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elevation/depression protraction/retraction rotation |
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sternoclavicular ligament
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sternum to clavicle anterior limits posterior movement of clavicle posterior limits anterior movement of clavicle reinforces joint capsule |
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costoclavicular ligament
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limits clavicular elevlation 1st rib to clavicle |
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interclavicular ligament
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connects sternal ends of clavicles limits clavicular depression |
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acromioclavicular jint
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connects acromion process with lateral clavicle elevation/depression of scapula with clavicle protraction/retraction of scapula with clavicle rotation of scapula with clavicle |
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holds the acromion process to the clavicle and prevents dislocation of the clavicle
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acromioclavicular joint
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coracoclavicular ligament
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helps reinforce the joint by holding the bones together
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acromioclavicular ligament
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reinforce the joint capsule
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coracoacromial ligament
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roof over head of the humerus, serves as a protective arch
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scapulothoracic articulation
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not a true joint scapula connected indirectly via the clavicle and several muscles provides motion and flexiblity |
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scapulohumeral rhythm
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the term used to describe the movement relationship between the shoulder girdle and shoulder joint 2 degree of shoulder abduction, the scapula upwardly rotates one degree |
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angle of pull
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muscles only pull in one direction
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vertical pull
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elevating or depressing the scapula
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horizontal pull
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retract or protract the scapula
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diagonal pull
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cause motion in both planes
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5 primary muscles, all originate on trunk
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trapezius levator scapulae rhomboids serratus anterior pectoralis minor |
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upper trapezius Origin
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Occipital protuberance and nuchal ligament
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upper trapezius insertion
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lateral clavicle and acromion process
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upper trapezius action
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scapular elevation upward rotation of scapula |
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upper trapezius nerve |
CN XI 11 |
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middle trapezius
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middle trapezius origin
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spinous processes C7-T3
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middle trapezius insertion
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spine of the scapula
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middle trapezius action
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scapular retraction
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middle trapezius nerve
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CN XI
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lower trapezius
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lower trapezius origin
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spinous processes of T4-T12
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lower trapezius insertion
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root of spine of scapula
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lower trapezius action
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scapular depression upward rotation of scapula |
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lower trapezius nerve
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CN XI
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levator scapula
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levator scapula origin
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C1-C4 transverse processes
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levator scapula insertion
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vertebral border of scapula from the superior angle to root of spine
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levator scapula action
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elevation downward rotation of scapula |
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levator scapula nerve
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dorsal scapular nerve
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rhomboid major and minor
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rhomboid origin
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spinous processes C7-T5
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rhomboid insertion
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vertebral border of scapula from root of spine to inferior angle
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rhomboid action
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scapular retraction downward rotation |
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rhomboid nerve
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dorsal scapular nerve
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pectoralis minor
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pectoralis minor origin
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anterior surface ribs 3-5
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pectoralis minor insertion
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coracoid process of scapula
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pectoralis minor action
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depression protraction downward rotation of the scapula |
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pectoralis minor nerve
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medial pectoral nerve
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force couple
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muscles pulling in different directions to produce rotation
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force couple for upward rotation
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upper trapezius - pulls up lower trapezius - pulls down serratus anterior - pulls out horizontally |
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force couple for downward rotation
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levator scapulae - pulls up rhomboids - pull in pectoralis minor - pulls down |
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muscle concentric contraction results in origin moving towards insertion, usually results when origin is fixed
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reversal of action
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elevators of the scapula
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upper trapezius levator scapula |
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depressors of the scapula
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pectoralis minor lower trapezius |
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protractors of the scapula
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pectoralis minor serratus anterior |
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retractors of the scapula
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middle trapezius rhomboids |
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upward rotators of the scapula
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upper trapezius lower trapezius serratus anterior |
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downward rotators of the scapula
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levator scapula rhomboids pectoralis minor |