External and internal abdominal obliques, transverse abdominal, and rectus abdominis
Explanation:
The abdominal wall compression involves the action of four muscles:
External abdominal obliques
Internal abdominal obliques
Transverse abdominal
Rectus abdominis
The external oblique, internal oblique, and transverse abdominis are the components of the lateral abdominal wall and the rectus abdominis is located medially.
The rectus abdominis muscle helps in stabilizing side bending and supports the trunk.
The abdominal obliques are involved in the rotation of the torso and bending along with the compression of the abdomen.
The transverse abdominal helps in respiration.
Besides there normal and routine functions all these muscles work together in abdominal compression.