Muscles of the Superficial Back

PHT 6187C - Functional Anatomy I UF DPT Pozzi

Upper trapezius

Upper trapezius O

Occipital bone, spinous processes C1-C7

Upper trapezius I

Lateral one-third of the clavicle

Upper trapezius N

CN XI - spinal accessory & ventral rami C3-C4

Upper trapezius A (insertion fixed)

B, neck extension; U, neck lateral flexion (same side), neck rotation (opposite side)

Upper trapezius A (origin fixed)

elevation and upward rotation of the scapula

Middle trapezius

Middle trapezius O

Spinous processes T1-T4

Middle trapezius I

Acromion and spine of the scapula

Middle trapezius N

CN XI - spinal accessory & ventral rami C3-C4

Middle trapezius A

Adduction of the scapula

Lower trapezius

Lower trapezius O

Spinous processes T5 – T12

Lower trapezius I

Spine of the scapula

Lower trapezius N

CN XI - spinal accessory & ventral rami C3-C4

Lower trapezius A

Depression and upward rotation of the scapula

Rhomboid minor

Rhomboid minor O

Spinous processes of C7-T1

Rhomboid minor I

Medial border of the scapula above the scapula spine

Rhomboid minor N

Dorsal scapular nerve (C5)

Rhomboid minor A

Adduction, elevation and downward rotation of the scapula

Rhomboid major

Rhomboid major O

Spinous processes of T1-T4

Rhomboid major I

Medial border of the scapula below the scapula spine

Rhomboid major N

Dorsal scapular nerve (C5)

Rhomboid major A

Adduction, elevation and downward rotation of the scapula

Levator scapulae

Levator scapulae O

Transverse processes C1-C4

Levator scapulae I

Superior angle of the scapula

Levator scapulae N

Dorsal scapular (C5) & branches from C3-5

Levator scapulae A (insertion fixed)

B, neck extension; U, neck lateral flexion and rotation (same side)

Levator scapulae A (origin fixed)

elevation and downward rotation of the scapula

Latissimus dorsi

Latissimus dorsi O

Spinous processes of T7-T12; thoracolumbar fascia; ribs 9-12; iliac crest

Latissimus dorsi I

Intertubercular groove of the humerus

Latissimus dorsi N

Thoracodorsal nerve (C6-C8)

Latissimus dorsi A (origin fixed)

Extension, adduction, internal rotation of the humerus

Latissimus dorsi A (insertion fixed)

Elevation of the pelvis

Supraspinatus

Supraspinatus O

Supraspinous fossa

Supraspinatus I

Superior facet on the greater tubercle

Supraspinatus N

Suprascapular nerve (C5-C6)

Supraspinatus A

Abduction of the humerus, stabilizes humeral head in the glenoid cavity

Infraspinatus

Infraspinatus O

Infraspinous fossa

Infraspinatus I

Middle facet on the greater tubercle

Infraspinatus N

Suprascapular nerve (C5-C6)

Infraspinatus A

External rotation of the humerus, stabilizes humeral head in the glenoid cavity

Teres minor

Teres minor O

Superior lateral border of the scapula

Teres minor I

Lower facet on the greater tubercle

Teres minor N

Axillary nerve (C5-C6)

Teres minor A

External rotation of the humerus, stabilizes humeral head in glenoid cavity

Teres major

Teres major O

Inferior angle of the scapula

Teres major I

Crest of the lesser tubercle of the humerus

Teres major N

Lower subscapular nerve (C5-C6)

Teres major A

Extension, adduction, internal rotation of the humerus