Big back/shoulder muscles Flashcards Preview

PT Anatomy Unit 1 > Big back/shoulder muscles > Flashcards

Flashcards in Big back/shoulder muscles Deck (13):
1

All 12 sites

Corocoid

Suprascapular Notch

Superior Margin

Superior Angle

Lateral Margin

Inferior angle

Medial Margin

Spine of Scapula

Acromium

Glenoid Fossa

Infraspinous Fossa

Supraspinous Fossa

 

2

Origins, 4

Superior nuchal line

Occipital protuberance

Medial margin of migamentum nuchae

Spinous process of C7-T12

3


Lateral Attachments

(Insertions)

Superior edge of the crest of the spine of the scapula,

Acromion,

Posterior border of lateral 1/3 of clavicle

 

4

Innervation

Function


Innervation:
Cranial Nerve XI: aka Accessory Nerve

 

Elevates and rotates the scapula,

Middle fibers retract scapula,

Lower fibers depress scapula

5

6

Attachments, Movements

4 Orig.

1 Insert.

Orig. Spinous process of lower six thoracic vertebrae, Thoracolumbar fasia to the spinous processes of the lumbar vertebrae, Iliac crest, Lower 3-4 ribs.

Insert. Floor of intertubercular sulcus.

Move. Adduction, Medial rotation, Extension.

7


Latissimus Dorsi Innervation

Thoracodorsal Nerve.

8

Identify these muscles. What do they hold in place?

 

Levator Scapulae

Rhomboid Minor

Rhomboid Major

Scapula.

9

Levator Scapula

A?
N?
F?

 

Origin: Transverse process of C1 and C2 and Posterior tubercles of transverse processes of C3 and C4.

Insertion: Posterior surface of medial border of scapula from superior angle to root of the spine of the scapula.

Dorsal Scapular Nerve

Elevates Scapula

10


Trio innervation

11

Rhomboid Minor

A?
N?

F?

 

Origin: Lower end of ligamentum nuchae. Spinous proesses of C7 and T1.

Insertion: Posterior surface of medial border of scapula at the root of the spine of the scapula

Dorsla Scapular Nerve.

Elevates and Retracts Scapula.

Downward rotation of Scapula.

12

Rhomboid Major

A?
N?
F?
 

 

Origin: Spinous processes of T2-T5 and intervening supraspinous ligaments.

Insertion: Posterior surface of medial border of scapula from root of the spine of the scapula Inferior angle.

Dorsal Scapular Nerve.

Elevates and retracts scapula.

Downward rotation of scapula.

13

Triceps Brachii

(Posterior Fibers)

A?
N?
F?
 

 

Long head:Origin: Infraglenoid tubercle on scapula.

Insertion: Medial and lateral heads of olecranon process on the ulna. (Common tendon insertion)

Radial Nerve

Extension of forearm and at glenohumeral joint.

Accessory adductor!!!!