Upper Limb Muscles

Question 1

Deltoid Muscle:

Answer 1

Origin:
- Clavicle
- Acromion
- Spine of the scapula

Insertion:
- Deltoid tuberosity of the humerus

Function:
- Arm abduction
- Extension of humerus
- Flexion of humerus
- Medial and lateral rotation of the humerus

Question 2

Teres Major Muscle:

Answer 2

Origin:
- Inferior angle of the scapula

Insertion:
Bicipital groove of the humerus

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