Pectineus

A muscle located in the upper thigh, responsible for hip flexion and adduction.

The pectineus is a flat, quadrangular muscle situated in the anterior compartment of the thigh. It originates from the superior ramus of the pubis and inserts into the pectineal line of the femur. This muscle plays a crucial role in movements of the hip, working to flex and adduct the leg as well as contributing to stabilization during various activities.

Terminologia Anatomica

musculus-pectineus

System

Musculoskeletal system

Function

The primary function of the pectineus muscle revolves around its dual action on the hip joint. By flexing the thigh, it assists movements like walking, running, and climbing. Additionally, its role in adduction means it helps bring the leg closer to the body's midline. This action is particularly significant when performing lateral movements or stabilizing the body while in a stance. Beyond these functions, the pectineus can also assist in medial rotation of the thigh. Although its contribution is more pronounced in certain activities, the muscle's presence is vital for the nuanced control and balance required in everyday movements, employing its strength in coordination with other muscles in the hip region.

Location

The pectineus muscle is located at the proximal (near the body trunk) part of the thigh, directly beneath the iliopsoas muscle. It lies medial to the sartorius and lateral to the adductor longus, situated close to the pelvis. Its position allows it to connect efficiently between the pelvis and the femur, playing an integral role in the overall function of the hip joint. The muscle spans from its origin at the pubic bone to its insertion on the femur, effectively bridging the pelvis and the thigh.

Did You Know?

The pectineus muscle is one of the oldest muscles in the human body, with its structure conserved across many species of mammals.
It can be classified as a hybrid muscle because it is innervated by both the femoral nerve and the obturator nerve.
The pectineus is sometimes referred to as a 'groin muscle' due to its location and involvement in actions that engage the inner thigh.