Superficial back muscle chart

What muscles make up the posterior axio-appendicular muscles

Trapezius, latissimus dorsi, levator scapulae, rhomboid minor, rhomboid major

What muscles make up the superficial posterior axio-appendicular muscles

Trapezius, latissimus dorsi

What muscles make up the deep posterior axio-appendicular muscles

Levator scapulae, rhomboid minor, rhomboid major

What muscles make up the scapulohumeral muscles

Deltoid, teres major, supraspinatus, infraspinatus, teres minor, subscapularis

What muscles make up the non-cuff scapulohumeral muscles

Deltoid, teres major

What muscles make up the rotator cuff

Supraspinatus, infraspinatus, teres minor, subscapularis

What is Attachment I of the trapezius

Medial 1/3 superior nuchal line, external occipital protuberance, nuchal ligament, SP of C7-T12

What is Attachment II of the trapezius

Lateral 1/3 clavicle, acromion, scapular spine

What is the innervation of the trapezius

Spinal Accessory N. (CN XI, C3, C4)

What is the main action of the trapezius

Scapular retraction, elevation (sup), depression (inf), upward rotation (sup & inf)

What is Attachment I of the latissimus dorsi

SP of T7-T12, thoracolumbar fascia, post 1/3 iliac crest, ribs 9 or 10-12

What is Attachment II of the latissimus dorsi

Floor of intertubercular sulcus (groove) humerus

What is the innervation of the latissimus dorsi

Thoracodorsal N. (C6, C7, C8)

What is the main action of the latissimus dorsi

GH extension, adduction, & IR

What is Attachment I of the levator scapulae

Posterior tubercles of TPs C1-C4

What is Attachment II of the levator scapulae

Medial border scapula superior to scapular spine

What is the innervation of the levator scapulae

Dorsal scapular N., cervical branches (C3, C4, C5)

What is the main action of the levator scapulae

Elevate, stabilize, downward rotation scapula, alone: lateral neck flex same side, bilat: extend neck

What is Attachment I of the rhomboid minor

Nuchal ligament, SPs of C7 & T1

What is Attachment II of the rhomboid minor

Medial border scapula at scapular spine

What is the innervation of the rhomboid minor

Dorsal scapular N. (C4, C5)

What is the main action of the rhomboid minor

Scapular retraction, downward rotation, fix scapula to thoracic wall (stabilize), assist scapular elevation

What is Attachment I of the rhomboid major

SPs of T2-T5

What is Attachment II of the rhomboid major

Med border scapula inf to scapular spine

What is the innervation of the rhomboid major

Dorsal scapular N. (C4, C5)

What is the main action of the rhomboid major

Scapular retraction, downward rotation, fix scapula to thoracic wall (stabilize), assist scapular elevation

What is Attachment I of the deltoid

Lateral 1/3 clavicle, acromion, and scapular spine

What is Attachment II of the deltoid

Deltoid tuberosity

What is the innervation of the deltoid

Axillary N. (C5, C6)

What is the main action of the deltoid

Anterior: flexion & horizontal add, middle: abduction, posterior: extension & horizontal abd

What is Attachment I of the teres major

Posterior surface inferior angle

What is Attachment II of the teres major

Intertubercular sulcus

What is the innervation of the teres major

Lower subscapular N. (C5, C6, C7)

What is the main action of the teres major

Adduction, extension, horizontal abduction, IR

What is Attachment I of the supraspinatus

Supraspinous fossa

What is Attachment II of the supraspinatus

Superior facet of greater tubercle

What is the innervation of the supraspinatus

Suprascapular N. (C4, C5, C6)

What is the main action of the supraspinatus

Initiates & assists deltoid in abduction, support humeral head

What is Attachment I of the infraspinatus

Infraspinous fossa

What is Attachment II of the infraspinatus

Middle facet of greater tubercle

What is the innervation of the infraspinatus

Suprascapular N. (C4, C5, C6)

What is the main action of the infraspinatus

ER, abduction, horizontal abduction, support humeral head

What is Attachment I of the teres minor

Middle lateral border

What is Attachment II of the teres minor

Inferior facet of greater tubercle

What is the innervation of the teres minor

Axillary N. (C5, C6)

What is the main action of the teres minor

Horizontal abduction, weak ER

What is Attachment I of the subscapularis

Subscapular fossa (most of anterior surface scapula)

What is Attachment II of the subscapularis

Lesser tubercle

What is the innervation of the subscapularis

Upper & lower subscapular N. (C5, C6, C7)

What is the main action of the subscapularis

IR & adduction, support humeral head