Shld & Arm act/nerve Origin/Insertion Flashcards
Deltoid act/nerve
All fibers abduct the shoulder. Ant. fibers flex the shoulder, med. rot., the shoulder and horizontally adduct. Post fibers extend, lat. rot. and horizontally abduct.
Axillary nerve
Trapezius act/nerve
Upper fibers: Bil extend the head and neck, ipsilaterally flex head/neck, contralaterally rotate head/neck, elevate scapula, upwardly rotate the scapula
Middle fibers: adduct the scap,and stabilize the scap
Lower fibers: depress the scap, upwardly rotate the scap (force couple with UT and Ser Ant.)
Spinal accessory/Ventral ramus nerves
Latissimus Dorsi act/nerve
Extend the shoulder, adduct the shoulder, med. rot. the shoulder
Thoracodorsal nerve
Teres Major act/nerve
Extend the shoulder, adduct the shoulder, med. rot. the shoulder
Lower subscapular nerve
Supraspinatus act/nerve
Abduct the shoulder, stabilize the head of the humerus in the glenoid cavity
Suprascapular nerve
Infraspinatus act/nerve
Lat. rot sholder, adduct shoulder, stabilize the head of the humerus
Suprascapular nerve
Teres minor act/nerve
Lat rot. shoulder, adduct the shoulder, stabilize the head of the humerus in the glenoid cavity
Axillary nerve
Subscapularis act/nerve
Med rot shoulder, stabilize the head of the humerus in the glenoid cavity
Upper & lower subscapular nerve
Rhomboid major act/nerve
Adduct the scapula, elevate the scapula, downwardly rotate the scapula
Dorsal scapular nerve
Rhomboid minor act/nerve
Adduct the scapula, elevate the scapula, downwardly rotate the scapula
Dorsal scapular
Levator scapula act/nerve
Uni: Elevate the scapula, downwardly rotate scap, laterally flex head/neck, ipsilaterally rotate head/neck. Bil: Extend the head/neck
Cervical 3,4, Dorsal scapular nerve
Serratus Anterior act/nerve
With origin fixed: Abduct the scap (protraction), upwardly rotate the scap, depress the scap, hold the medial border of the scap to the rib cage.
With scapula fixed: May elevate thorax during forced inhalation.
Long thoracic nerve
Pectoralis major act/nerve
All fibers: Adduct the shoulder, med rot the shoulder, assist to elevate the thorax during forced inhalation.
Upper fibers: Flex the sholder, horizontally adduct the shoulder
Lower fibers: Extend the shoulder to lateral midline
Upper: Lateral pectoral nerve
Lower: Lateral and medial pectoral nerve
Pectoralis minor act/nerve
Depress the scapula, abduct the scap, downwardly rotate the scap.
With scapula fixed: Assist to elevate thorax during forced inhalation.
Medail pectoral nerve
Subclavius act/nerve
Depress the clavicle & draw it anteriorly, elevate the first rib, stabilize the sternoclavicular joint
Subclavian nerve
Biceps brachii act/nerve
Flex the elbow, supinate the forearm, flex the shoulder.
Musculocutaneous nerve
Triceps brachii act/nerve
All heads: Extend the elbow
Long head: Extend the shoulder, adduct the shoulder
Radial nerve
Coracobrachialis act/nerve
Flex the shoulder, adduct the shoulder
Musculocutaneous nerve
Deltoid Origin/Insertion
O: Lateral 1/3 of the clavicle, acromion and spine of scapula
I: Deltoid tuberosity
Trapezius Origin/Insertion
O: External occipital protuberance, medial portion of the superior nuchal line of the occiput, ligamentum nuchae and spinous processes of C7-T12
I: Lateral 1/3 of the clavicle, acromion and spine of scapula
Latissimus Dorsi Origin/Insertion
O: Inferior angle of the scapula , spinous processes of the last six vertebrae, last three or four ribs, thoracolumbar fascia and posterior iliac crest
I: Intertubercular groove of the humerus
Teres Major Origin/Insertion
O: Inferior angle and lower 1/3 of the lateral border of the scapula
I: Crest of the lesser tubercle of the humerus
Supraspinatus Origin/insertion
O: Supraspinious fossa of the scapula
I: Greater tubercle of the humerus
Infraspinatus Origin/Insertion
O: Infraspinious fossa of the scapula
I: Greater tubercle of the humerus
Teres Minor Origin/Insertion
O:Upper 2/3 of the lateral border of the scapula
I: Greater tubercle of the humerus
Subscaularis Origin/Insertion
O: Subscaular fossa of the scapula
I: Lesser tubercle of the humerus
Rhomboid Major Origin/Insertion
O: Spinous processes of T2-T5
I: Medial border of the scapula between the spine of the scapula and the inferior angle
Rhomboid Minor Origin/Insertion
O: Spinous processes of C7 and T1
I: Upper portion of the medial border of the scapula, at the level of the spine of the scapula
Levator Scapula Origin/Insertion
O: Transverse processes of the first through fourth cervical vertebrae
I: Medial border of the scapular, between the superior angle and superior portion of the spine of the scapula
Serratus Anterior Origin/Insertion
O: External surfaces of the upper eight or nine ribs
I: Anterior surface of the medial border of the scapula
Pectoralis Major Origin/Insertion
O: Medial 1/2 of the clavicle, sternum and cartilage of the first through sixth ribs
I: Crest of the greater tubercle of the humerus
Pectoralis Minor Origin/Insertion
O: Third fourth and fifth ribs
I: Medial surface of the coracoid process of the scapula.
Subclavius Origin/Insertion
O: First rib and cartilage
I: Inferior surface of the middle 1/3 of the clavicle
Biceps Brachii Origin/Insertion
O: Short head-coracoid process of the scapula. Long head-supraglenoid tubercle of the scapula
I: Tuberosity of the radius and aponeurosis of the biceps brachii
Triceps Brachii Origin/Insertion
O: Long head-Infraglenoid tubercle. Lateral head-Posterior surface and proximal half the humerus. Medial head: Posterior surface of the distal half of the humerus.
I: Olecranon process of the ulna
Coracobrachialis Origin/Insertion
O: Coracoid process of the scapula
I: Medial surface of the mid-humeral shaft
