Muscles of the Back Flashcards Preview

Anatomy - Musculoskeletal > Muscles of the Back > Flashcards

Flashcards in Muscles of the Back Deck (11):
1

Trapezius

O: Cervical and thoracic vertebrae

I: Distal clavicle, multiple sites on scapula

A: Moves scapula

N: Accessory (XI)

2

Latissimus Dorsi

O: Thoracic, lumbar, and sacral vertebrae; iliac crest

I: Humerus

A: Rotates arm, adducts, extends

N: Thoracodorsal (C6-C8), from posterior portion of brachial plexus

3

Levator Scapulae

O: Cervical Vertebrae

I: Scapula - superior, medial border

A: Elevates and adducts scapula

N: Dorsal scapular (C5-C6), from brachial plexus

4

Rhomboid Minor

O: Thoracic Vertebrae

I: Scapula - medial border

A: Elevates and adducts scapula

N: Dorsal scapular (C5-C6), from brachial plexus

5

Rhomboid Major

O: Thoracic Vertebrae

I: Scapula - medial border

A: Elevates and adducts scapula

N: Dorsal scapular (C5-C6), from brachial plexus

6

Subscapularis

O: Subscapular fossa

I: Lesser tubercle of humerus

A: Rotates medially (IR)

N: C5, C6

7

Infraspinatus

O: Infraspinatus fossa

I: Greater tubercle of humerus

A: Lateral rotation (ER)

N: C5, C6

8

Teres Minor

O: Posterior scapula

I: Greater tubercle of humerus

A: Lateral rotation (ER)

N: C5, C6

9

Supraspinatus

O: Supraspinatus fossa

I: Greater tubercle of humerus

A: Abduction

N: C5, C6

10

Levatores Costarum, Serratus posterior superior, Serratus posterior inferior

O: Vertebrae

I: Ribs

A: Respiration

N: Doral rami of thoracic spinal nerves (Levatores costarum)
Intercostal nerves (serratus muscles)

11

Splenius

O: Vertebrae

I: Occipital and temporal bones; transverse processes

A: Extend neck and head

N: Dorsal rami of thoracic spinal nerves