1. Abdomen and Pelvis Origin and Insertion
Ms. Treto
PT Academy

2. Serratus Anterior Origin – superior 8 or 9 ribs
Insertion – vertebral border
and inferior angle of scapula.
Function -
abduction and rotates
scapula upwards.
elevates ribs when
scapula stabilized.

3. Linea Alba
A fibrous structure that runs down the midline of the abdomen in humans and other vertebrates. In humans, linea alba runs from the xiphoid process to the pubic symphasis.

4. Lumbar Triangle Is formed by – posterior border of external oblique,
superior border of iliac crest,
and lateral border of
latissimus dorsi.

5. Piriformis Origin – anterior surface of sacrum.
Insertion – greater trochanter of femur
Function - lateral rotation

6. Erector Spinea Muscle Group
Origin – spines of upper
lumbar and lower thoracic
vertebrae
Insertion – spines of upper
Thoracic and cervical
Function – extends vertebral
column, assists in bending
backward, sideways and with
rotation of spine.