Origins and Insertions of certain muscles

origin of pectoralis major

origin- Clavicular part: anterior surface of medial half of clavicle
Sternocostal part: anterior surface of sternum, Costal cartilages of ribs 1-6
Abdominal part: Anterior layer of rectus sheath

insertion of pectoralis major

insertion- Lateral lip of intertubercular sulcus of humerus

origin of latissimus dorsi

origin- Spinous processes of thoracic vertebrae T7-L5, Iliac crest, Inferior angle of the scapula, Lower 3-4 ribs, and Thoracolumbar fascia

insertion of latissimus dorsi

insertion- Intertubercular sulcus of the humerus, between pectoralis major and teres major muscles Lady between two majors

insertion of masseter

insertion- Lateral surface of ramus and angle of mandible

origin of masseter

origin- Superficial part: maxillary process of zygomatic bone, Inferior border of zygomatic arch (anterior 2/3)

Deep part: deep/inferior surface of zygomatic arch (posterior 1/3)

origin of brachialis

origin- Distal half of anterior surface of humerus

insertion of brachialis

insertion- Coronoid process of the ulna; Tuberosity of ulna

origin of tensor fascia latae

origin- Outer lip of anterior iliac crest, Anterior superior iliac spine (ASIS)

insertion of tensor fascia latae

insertion- Lateral condyle of tibia (via iliotibial tract)

origin of rectus femoris

origin- originates from anterior inferior iliac spine(AIIS) and the part of alar of ilium superior to the acetabulum

insertion of rectus femoris

insertion- the patella and tibial tuberosity (via patellar ligament)

origin of levator scapulae

origin- Transverse processes of vertebrae C1-C4

insertion of levator scapulae

insertion- Medial border of scapula (from superior angle to root of spine of scapula)