The abdominal muscles, also known as the rectus abdominis and obliques, are a group of muscles located in the anterior part of the trunk. These muscles play an important role in supporting the spine and maintaining posture while performing various movements such as bending or twisting. The main function of these muscles is to stabilize the core region of the body, which includes the pelvic girdle and the spinal column. They also help in respiration by moving the ribcage during inhalation and exhalation.