Superficial Muscles of the Back

Question 1

Trapezius:

Answer 1

Origin:
- Occipital Bone
- Nuchal Ligament
- Thoracic spinous processes

Insertion:
- Clavicle
- Acromion
- Spine of scapula

Function:
Scapula elevation, depression, and retraction

Question 2

Latissimus Dorsi:

Answer 2

Origin:
- Spinous processes of the lumber and lower thoracic vertebrae
- Sacrum

Insertion:
- Bicipital groove of the humerus

Function:
- Arm extension
- Arm adduction
- Medial rotation of the arm

Question 3

Levator Scapulae:

Answer 3

Origin:
- C1-C4 of the transverse processes

Insertion:
- Medial border of scapula (superior to the scapular spine)

Function:
Elevate scapula

Question 4

Rhomboid Minor & Major:

Answer 4

Origin:
- C7-T5 spinous processes

Insertion:
Medial Border of Scapula

Function:
Scapula retraction

NOTE: Rhomboid MINOR is SUPERIOR to major