Answer:
The origin of the transverse abdominal muscle is on the iliac crest and the inguinal ligament.
Step-by-step explanation:
The transverse abdominal muscle, also known as transversus abdominis muscle, originates from the inguinal ligament, the Iliac crest, thoracolumbar fascia and the costal cartilages 7-12 and inserts into the Xiphoid process, pubic crest, linea alba and the pecten pubis. It is the innermost flat muscle layer of the anterior and the lateral abdominal wall.
Therefore, the transverse abdominal muscle arises from the iliac crest and inguinal ligament.