Posterior Axioappendicular muscles Flashcards Preview

Gross Anatomy > Posterior Axioappendicular muscles > Flashcards

Flashcards in Posterior Axioappendicular muscles Deck (18):
1

Trapezius Origin (4)

1) Medial 1/3 of superior nuchal line
2) External Occipital Protuberance (EOP)
3) Nuchal Ligament
4) Spinous processes C7-T12 Vertebrae

2

Trapezius Insertion (3)

1) Lateral 1/3 of clavicle
2) Acromion
3) Spine of Scapula

3

Trapezius Innervation (2)

1) Motor Fibers-CN XI (Spinal Accessory Neve)
2) Sensory Fibers- C3, C4

4

Trapezius Action (3)

1) Descending fibers-Elevates scapula
2) Ascending fibers-Depresses scapula
3) Middle fibers-Retracts scapula

5

Latissimus Dorsi Origin (4)

1) Spinous processes of inferior 6 thoracic vertebrae
2) Thoracolumbar Fascia
3) Iliac Crest
4) Inferior 3/4 ribs

6

Latissimus Dorsi Insertion

Floor of intertubercular sulcus (groove) of humerus

7

Latissimus Dorsi Innervation

Thoracodorsal nerve- C6*, C7*, C8

*=main segmental innervation

8

Latissimus Dorsi Action (3)

Extends, adducts, and medially rotates humerus

9

Levator Scapulae Origin

Posterior tubercles of transverse processes of C1-C4 vertebrae

10

Levator Scapulae Insertion

Medial border of scapula superior to root of spine

11

Levator Scapulae Innervation (3)

Dorsal Scapular nerve-C5
Cervical nerves- C3, C4

12

Levator Scapulae Action (2)

1) Elevates scapula
2) Rotates scapula

13

Rhomboid Minor Origin (2)

1) Nuchal Ligament
2) Spinous processes of C7 & T1 Vertebrae

14

Rhomboid Minor Insertion

Medial end of scapular spine

15

Rhomboid Minor & Major Innervation

Dorsal Scapular Nerve- C4, C5*

16

Rhomboid Major Origin

Spinous processes of T2-T5 Vertebrae

17

Rhomboid Major Insertion

Medial border of scapula (From spine-inferior angle)

18

Rhomboid Minor & Major Action (2)

1) Retract scapula and rotate to depress Glenoid cavity
2) Fix scapula to thoracic wall