Muscle of day: neck and shoulder

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Infraspinatus Origin

Infraspinous fossa of scapula

Levator Scapulae Origin

Transverse processes of C1-C4

Rhomboids Insertion

Vertebral border of scapula from root of spine to inferior angle

Supraspinatus Action

Abduction of arm

Deltoid Action

Abduction of arm Anterior fibers flex and internally rotate arm Posterior fibers extend and externally rotate arm

Pectoralis Minor Origin

Anterior aspect of ribs 3-5

Deltoid Origin

Anterior surface of lateral 1/3 of clavicle, acromion and spine of scapula

Deltoid Innervation

Axillary nerve (C5, C6)

Pectoralis Major Origin

Clavicular head: medial 1/2 of clavicle Sternal head: sternum and costal cartilage of upper 6 ribs

Pectoralis Minor Action

Depression of scapula

Rhomboids Innervation

Dorsal scapular (C5)

Levator Scapulae Innervation

Dorsal scapular n. (C5)

Teres Major Origin

Dorsal surface of inferior angle of scapula

Infraspinatus Action

External rotation of arm

Latissimus Dorsi Insertion

Floor of intertubercular groove

Serratus anterior origin

Lateral aspect of upper 8 to 9 ribs

Teres Major Innervation

Lower subscapular (C6, C7)

Pectoralis Major Innervation

Medial and lateral pectoral Clavicular (C5-C6) Sternal (C7-T1)

Teres Major Insertion

Medial lip of intertubercular groove

Infraspinatus Insertion

Middle facet of greater tubercle of humerus

Rhomboids Origin

Minor: spinous processes C7-T1 Major: spinous processes T2-T5

Serratus anterior action

Protraction and upward rotation of scapula

Trapezius Action

Retraction and upward rotation of scapula Upper fibers elevate scapula Lower fibers upwardly rotate and depress the scapula

Latissimus Dorsi Origin (6)

Spinous processes of lower 6 thoracic and all lumbar vertebrae Thoracolumbar fascia Sacrum Iliac crest portions of lower 3 ribs inferior angle of scapula

Levator Scapulae Insertion

Superior angle of scapula

Supraspinatus Insertion

Superior facet of greater tubercle of humerus

Trapezius Insertion

Superior fibers: posterior surface of lateral 1/3 of clavicle and acromion Middle fibers: acromion and spine of scapula Lower fibers: medial 1/3 of spine of scapula

Infraspinatus Innervation

Suprascapular nerve (C5, C6)

Supraspinatus Innervation

Suprascapular nerve (C5, C6)

Supraspinatus Origin

Supraspinous fossa of scapula

Latissimus Dorsi Innervation

Thoracodorsal (C6-C8)

Teres Major Action

Adduction, extension and internal rotation of arm

Pectoralis Major Action

Adduction and internal rotation of arm Clavicular head: flexes arm Sternal head: extends arm

Latissimus Dorsi Action

Adduction, extension and internal rotation of arm

Pectoralis Minor Insertion

Coracoid process

Serratus anterior insertion

Costal surface of vertebral border of scapula

Deltoid Insertion

Deltoid tuberosity of humerus

Levator Scapulae Action

Elevation and downward rotation of scapula

Rhomboids Action

Elevation, retraction, and downward rotation of scapula

Pectoralis Major Insertion

Lateral lip of intertubercular groove

Serratus anterior innervation

Long thoracic (C5-C7)

Trapezius Origin

Superior nuchal line External occipital protuberance Ligamentum nuchae Spinous processes C7-T12

Pectoralis Minor Innervation

medial and lateral pectoral (C6-C8)

Trapezius Innervation

spinal accessory (XI)


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