Muscles of the Shoulders Flashcards
Pec Major Origin
Clavicular head: Ant. surface of medial half of calvicle
Sternocostal head:
Ant surface of sternum, superior 6 costal cartilages aponeuro of external oblique muscles
Pec Major Insertion
Lateral lip of intertubercular sulcus
Pec Major nerves
Lateral and medial pectoral nerves
Pec Major B.S.
Thoracoacromial artery
Pec Major action
Adduction, medial rotation and flexion of humerus
Pec minor origin
3rd to 5th costal cartilage
Pec minor insertion
Medial border and superior surface of coracoid process of scapula
Pec minor innervation
Medial pectoral nerve
Pec minor artery
Thoracromial artery
Pec minor action
Stabilization of scapula
Serratus Anterior origin
External surface of lateral parts of ribs 1 to 8
Serratus Anterior insertion
Ant. surface of medial border of scapula
Serratus Anterior nerve
Long thoracic nerve
Serratus Anterior blood
Lateral thoracic and thoracodorsal
Serratus Anterior action
Protraction and rotation of scapula
Lat Dorsi origin
Spinous processes of T7 to T12, thoracolumbar fascia, iliac crest and inferior 3 or 4 ribs
Lat Dorsi Insertion
Floor of intertubecular sulcus of humerus
Lat Dorsi nerve
Thoracordorsal
Lat Dorsi blood supply
Thoracordosal artery and branch from subscapular
Lat Dorsi action
Extension, adduction, medial rotation of humerus
Teres major origin
Posterior surface of inf. angle of scapula
Teres major insertion
Medial lip of interubercular sulcus
Teres major nerve
Lower subscap
Teres major blood supply
Subscap and circumflex scap
Teres major action
Adduction and medial rotation of hum.
Subscapularis origin
Subscapular fossa
Subscapularis insertion
Lesser tubercle of hum.
Subscapularis nerve/insertion
Upper and lower subscapular nerve/artery
Subscapularis action
Medial rotation and adduction of humerus
Trapezius origin
Medial third of nuchal line, nuchal ligament, occiptal protuberance, c7 to t12
Trapezius insertion
Lateral 1/3 of clavicle, acromion and spine of scapula
Trapezius nerves
Spinal accessory nerve and c3 and c4 spinal nerves
Trapezius blood supply
Transverse and superficial cervical arteries
Trapezius action
Elevation, depression and retraction of scapula, rotates glenoid cavity superiorly
Levator scapulae origin
Posterior tubercules of transverse processes c1-4
Levator scapulae insertion
Medial border of scapula
Levator scapulae nerves
Dorsal scapular and cervicle nerves
Infraspinatus origin
Infraspinour fossa of scap.
Infraspinatus insertion
Middle facet of greater tub. of hum.
Infraspinatus nerve
Suprascapular
Infraspinatus b.s.
circumflex scapular artery, suprascapular
Infraspinatus action
Lateral rotation of hum.
Supraspinatus origin
Supraspinous fossa of scapula
Supraspinatus insertion
superior facet of greater tubercle of hum.
Supraspinatus nerve/b.s.
Suprascapular
Supraspinatus action
Abduction of hum.
Teres minor origin
Middle part of lateral border of scapula
Teres minor insertion
middle facet
Teres minor nerve/b.s.
circumflex scapular, suprascapular
Teres minor action
Lat rotation of hum.
Rhomoid major origin
t2-t5
Rhomoid major/minor insertion
Medial border of scap.
Rhomoid major/minor b.s./nerve
Dorsal scap.
Rhomoid major and minor action
Retraction, rotation of scapula to depress glenoid cavity, fixation of scapula
Rhomoid minor origin
Nuchal ligament and c7-t1
Deltoid origin
Lateral 3rd of clavicle, acromion, and spine of scapula
Deltoid insertion
Deltoid tuberosity
Deltoid nerve
Axillary
Deltoid artery
Thoracromial & anterior and posterior circumflex humeral arteries
Deltoid action
Flex, abd., ext., lat rotation, medial rotation of humerus