Superficial Muscles Of The Back

Front 1

Origin of Trapezius

Back 1

medial third of the superior nuchal line, external occipital protuberance, ligamentum nuchae, spinous processes of vertebrae C7-T1

Front 2

Insertion of Trapezius

Back 2

lateral third of the clavicle, medial side of the acromion and the upper crest of the scapular spine, tubercle of the scapular spin

Front 3

Innervation of Trapezius

Back 3

motor: spinal accessory (XI), proprioception: C3-C4

Front 4

Action of Trapezius

Back 4

elevates and depresses the scapula (depending on which part of the muscle contracts); rotates the scapula superiorly; retracts scapula

Front 5

Blood Supply of Trapezius

Back 5

transverse cervical artery

Front 6

Origin of Rhomboid Major

Back 6

spines of vertebrae T2-T5

Front 7

Insertion of Rhomboid Major

Back 7

Medial border of the scapula, inferior to the spine of the scapula

Front 8

Action of Rhomboid Major

Back 8

retracts, elevates, and rotates the scapula inferiorly

Front 9

Innervation of Rhomboid Major

Back 9

dorsal scapular nerve (C5)

Front 10

Blood Supply of Rhomboid Major

Back 10

dorsal scapular artery

Front 11

Origin of Latissimus Dorsi

Back 11

vertebral spines from T7 to the sacrum, posterior third of the iliac crest, lower 3 or 4 ribs, sometimes from the inferior angle of the scapula

Front 12

Insertion of Latissimus Dorsi

Back 12

floor of the intertubercular groove

Front 13

Action of Latissimus Dorsi

Back 13

extends and rotates the arm medially, along with adduction of the arm

Front 14

Innervation of Latissimus Dorsi

Back 14

thoracodorsal nerve (C7,8) from the posterior cord of the brachial plexus

Front 15

Blood Supply of Latissimus Dorsi

Back 15

thoracodorsal artery

Front 16

Origin of Rhomboid Minor

Back 16

inferior end of the ligamentum nuchae, spines of vertebrae C7 and T1

Front 17

Insertion of Rhomboid Minor

Back 17

medial border of the scapula at the root of the spine of the scapula

Front 18

Action of Rhomboid Minor

Back 18

retracts, elevates and rotates the scapula inferiorly

Front 19

Innervation of Rhomboid Minor

Back 19

dorsal scapular nerve (C5)

Front 20

Blood Supply of Rhomboid Minor

Back 20

dorsal scapular artery

Front 21

Origin of Levator Scapulae

Back 21

transverse processes of C1-C4 vertebrae

Front 22

Insertion of Levator Scapulae

Back 22

medial border of the scapula from the superior angle to the spine

Front 23

Action of Levator Scapulae

Back 23

elevates the scapula

Front 24

Innervation of Levator Scapulae

Back 24

dorsal scapular nerve (C5); the upper part of the muscle receives branches of C3 & C4

Front 25

Blood Supply of Levator Scapulae

Back 25

dorsal scapular artery