The psoas minor muscle, also known simply as the psoas minor, is a sleek and elongated muscle that forms part of the group of muscles known as the hip flexors. It is located deep within the abdomen, in close proximity to the psoas major muscle, which is larger and more prominent.
Originating from the sides of the 12th thoracic and 1st lumbar vertebrae of the spine, the psoas minor muscle travels downward through the abdominal cavity, crossing over the psoas major muscle. It then attaches to the iliopectineal line of the pelvis, near the iliopsoas tendon that it shares with the psoas major muscle.
Despite being a relatively small muscle, the psoas minor plays an important role in hip flexion and stabilization. Working in conjunction with the other hip flexors, it assists in bending the hip joint, bringing the thigh forward and upward. Additionally, it helps in stabilizing the lumbar spine and maintaining good posture.
While the psoas minor muscle is often present, it is not always developed or found in every individual. Furthermore, it may be absent entirely in some cases. This muscle may occasionally be implicated in lower back pain if it becomes strained or exceeds its normal range of motion. In such cases, rest, stretching exercises, and professional medical assistance may be warranted.
