The internal obliques are a pair of muscles located on the sides of the abdomen, beneath the external obliques. They play a crucial role in trunk rotation, lateral flexion, and stabilization of the torso. These muscles help support the spine and assist in movements such as bending and twisting. The internal obliques originate from the lower ribs and the iliac crest of the pelvis, extending diagonally downward toward the midline of the body. They work in conjunction with other core muscles, including the rectus abdominis and transverse abdominis, to maintain posture and facilitate various physical activities.