Back Muscles: Origin, Insertion, Action, Innervation
Latissimus Dorsi: innervation
pectoral nerves
Infraspinatus: innervation
suprascapular nerve
Supraspinatus: innervation
suprascapular nerve
Supraspinatus: origin
supraspinous fossa of scapula
Rhomboid Major: insertion
vertebral boarder of the scapula from spine to inferior angle
Rhomboid Minor: insertion
vertebral border of the scapula near the spine
Supraspinatus: action
aBduction of shoulder
Rhomboid Major: action
aDduct the scapula and downward rotation
Rhomboid Minor: action
aDduct the scapula and downward rotation
Trapezius: innervation
accessory nerve (11) and cervical spine nerves
Serratus Anterior: origin
anterior and superior margin of ribs 1-8 and sometimes 9
Serratus Anterior: insertion
anterior surface of vertebral border of scapula
Teres Minor: innervation
axillary nerve
Trapezius: insertion
clavicle and scapula
Rhomboid Major: innervation
dorsal scapular nerve
Rhomboid Minor: innervation
dorsal scapular nerve
Teres Major: action
extension, aDduction and medial rotation at the shoulder
Latissimus Dorsi: action
extension, aDduction, medial rotation at the shoulder joint
Latissimus Dorsi: insertion
floor of the intertubercular groove of the humerus
Infraspinatus: insertion
greater tubercle of humerus
Supraspinatus: insertion
greater tubercle of humerus
Teres Major: origin
inferior angle of the scapula
Trapezius: origin
occipital bane, ligamentum niche, spinous processes of the thoracic vertebrae
Teres Minor: insertion
passes laterally to reach the greater tubercle of humerus
Teres Major: insertion
passes medially to reach the medial lip of the intertubercular groove of the humerus
Serratus Anterior: action
protract shoulders, rotate scapula to move glenoid cavity superior/ upward rotation
Teres Minor: origin
lateral border of the scapula
Latissimus Dorsi: origin
spinous processes of inferior thoracic and all lumbar vertebrae, rib 8-12, thoracolumbar fascia
Rhomboid Major: origin
spinous processes of the superior thoracic vertebrae
Rhomboid Minor: origin
spinous processes of vertebrae C7 to T1
Trapezius: action
elevate, retract, depress, rotate scapula upward, elevate clavicle, extending neck
Infraspinatus: origin
infraspinous fossa of scapula
Teres Minor: action
lateral rotation at shoulder
Infraspinatus: action
lateral rotation at the shoulder
Serratus Anterior: innervation
long thoracic nerve
Teres Major: innervation
lower subscapular nerve
