Posterior Axioappendicular muscles

Question 1

Trapezius Origin (4)

Answer 1

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

Question 2

Trapezius Insertion (3)

Answer 2

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

Question 3

Trapezius Innervation (2)

Answer 3

1) Motor Fibers-CN XI (Spinal Accessory Neve)

2) Sensory Fibers- C3, C4

Question 4

Trapezius Action (3)

Answer 4

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

Question 5

Latissimus Dorsi Origin (4)

Answer 5

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

Question 6

Latissimus Dorsi Insertion

Answer 6

Floor of intertubercular sulcus (groove) of humerus

Question 7

Latissimus Dorsi Innervation

Answer 7

Thoracodorsal nerve- C6, C7, C8

*=main segmental innervation

Question 8

Latissimus Dorsi Action (3)

Answer 8

Extends, adducts, and medially rotates humerus

Question 9

Levator Scapulae Origin

Answer 9

Posterior tubercles of transverse processes of C1-C4 vertebrae

Question 10

Levator Scapulae Insertion

Answer 10

Medial border of scapula superior to root of spine

Question 11

Levator Scapulae Innervation (3)

Answer 11

Dorsal Scapular nerve-C5

Cervical nerves- C3, C4

Question 12

Levator Scapulae Action (2)

Answer 12

1) Elevates scapula

2) Rotates scapula

Question 13

Rhomboid Minor Origin (2)

Answer 13

1) Nuchal Ligament

2) Spinous processes of C7 & T1 Vertebrae

Question 14

Rhomboid Minor Insertion

Answer 14

Medial end of scapular spine

Question 15

Rhomboid Minor & Major Innervation

Answer 15

Dorsal Scapular Nerve- C4, C5*

Question 16

Rhomboid Major Origin

Answer 16

Spinous processes of T2-T5 Vertebrae

Question 17

Rhomboid Major Insertion

Answer 17

Medial border of scapula (From spine-inferior angle)

Question 18

Rhomboid Minor & Major Action (2)

Answer 18

1) Retract scapula and rotate to depress Glenoid cavity

2) Fix scapula to thoracic wall