Superficial Posterior Pectoral Girdle

Question 1

Trapezius

Answer 1

(Descending)
O: External occipital protuberance, superior nuchal line, nuchal ligament, SP of C7
I: Posterior aspect lateral 1/3 of clavicle, acromion
A: Elevation, retraction, lateral rotation of scapula. Extension & lateral flexion of the neck
N: Accessory n., anterior rami of cervical n. 3 & 4

Transverse
O: SP of C7 - T4
I: Acromion, lateral end of spine of scapula
A: Retraction of scapula
N: Accessory n., anterior rami of cervical n. 3 & 4

Ascending
O: SP of T5 - T12
I: Medial end of spine of scapula
A: Depression, retraction, lateral rotation of scapula
N: Accessory n., anterior rami of cervical n. 3 & 4

Question 2

Latissimus Dorsi

Answer 2

O: SP of T7 - T12, SP of L1 - L5 via thoracolumbar fascia, ribs 9 - 12, illiac crest
I: Intertubercular sulcus of humerus
A: Adduction, extension, internal rotation of humerus
N: Thoracodorsal n.

Question 3

Rhomboid Major

Answer 3

O: SP of T2-T5
I: Medial border of scapula, interior to spine of scapula
A: Retration, medial rotation of scapula
N: Dorsal scapular n.

Question 4

Rhomboid Minor

Answer 4

O: Nuchal ligament, SP of C7 - T1
I: Medial border of scapula, adjacent to spine of scapula
A: Retration & medial rotation of scapula
N: Dorsal scapular n.

Question 5

Levator Scapulae

Answer 5

O: TP of C1-C4
I: Superior angle of scapula & medial border of scapula, superior to spine of scapula
A: Elevation & medial rotation of scapula, extension and lateral flexion of cervical vertebrae
N: Anterior rami of 3rd & 4th cervical nerves, dorsal scapular n.