Learning Objectives Differentiate among the muscles involved in moving the hip joint. Key Takeaways Key Points The gluteus maximus extends the hip, while the gluteus medius and minimus are involved in hip rotation and abduction moving hip out from the midline.
The adductor group adductor brevis, longus, and magnus along with petineus and gracilis moves the femur towards the midline from an abducted position.
The iliopsoas group of muscles iliacus and psoas major is responsible for hip flexion. The lateral rotator group of muscles externus and internus obturators, the piriformis, the superior and inferior gemelli, and the quadratus femoris turns the anterior surface of the femur outward. This motion is aided by the gluteus maximus and the adductor magnus. Key Terms adductor group : The adductor brevis, adductor longus, adductor magnus, pectineus, and gracilis. Gluteus Maximus : The gluteus maximus is the largest of the gluteal muscles and gives structure to the buttocks.
Attachments: Originates from the posterior of the pelvis and coccyx tailbone and attaches to the femur. Actions: Extends of the thigh and assists with rotation. Is only used when the generation of force is required e. Gluteus Medius : The fan-shaped gluteus medius muscle lies between the gluteus maximus and minimus and performs a similar function to the gluteus minimus.
Attachments: Originates from the posterior of the pelvis and attaches to the femur. Actions: Abducts and medially rotates the thigh and fixes the pelvis during walking.
Gluteus Minimus : The gluteus minimus is the deepest and smallest of the superficial gluteal muscles and performs a similar function to the gluteus medius. Attachments: Originates from the pelvis and attaches to the femur. Lateral Rotator Group The muscles of the lateral rotator group are deeply located and as the name suggests, act to laterally rotate the thigh at the hip.
Piriformis : The piriformis is the most superior of the lateral rotator group muscles. Actions: Lateral rotation and abduction of the thigh at the hip. Obturator Internus : The obturator internus lines the internal wall of the pelvis. Gemelli : The gemelli are two superior and inferior narrow and triangular muscles, separated by the obturator internus tendon. Quadratus Femoris : The quadratus femoris is a flat, square-shaped muscle actually composed of four distinct muscles.
It is the most inferior of the lateral rotator group muscles, located below the gemelli and obturator internus. Actions: Lateral rotation of the thigh at the hip, plays a major role in extension of the lower leg at the knee as well. Adductor Longus : The adductor longus is a large, flat muscle covering the adductor magnus and adductor brevis. Attachments: Originates from the pubis and broadly attaches to the femur.
Actions: Adduction and medial rotation of the thigh. Adductor Magnus : The adductor magnus is the largest and most posterior of the adductor group muscles.
Attachments: Originates from the pubis and attaches to the femur. Actions: Adducts, flexes, and extends the thigh. Adductor Brevis : The adductor brevis is a short muscle lying underneath the adductor longus.
Actions: Adduction of the thigh. Obturator Externus : This is one of the smaller muscles of the medial thigh, and it is located most superiorly. Actions: Laterally rotates the thigh. Gracilis : The gracilis is the most superficial and medial of the adductor group muscles. An appraisal of the short lateral rotators of the hip. Clinical Anatomy. We have a course that teaches you 65 muscles in 79 lessons using high-quality 3D models. What and where are the deep six lateral rotator muscles? Which muscles are included in the deep six lateral rotator muscle group?
Where are the deep six lateral rotator muscles located? Origins The piriformis muscle originates on the anterior sacrum. The gemellus inferior and gemellus superior originate on the ischial spine. The obturator externus originates on the external surface of the obturator foramen.
The obturator internus originates on the internal surface of the obturator foramen. We have award-winning 3D products and resources for your anatomy and physiology course! Learn more here. When you select "Subscribe" you will start receiving our email newsletter. Use the links at the bottom of any email to manage the type of emails you receive or to unsubscribe. See our privacy policy for additional details. Welcome to the Visible Body Blog! Learn Muscle Anatomy: Lateral Rotators.
Let's take a quick dive into each of them, shall we? Piriformis Image from Muscle Premium. Quadratus Femoris Image from Muscle Premium. That was kind of a lot of information to throw at you. Subscribe Here! Close Privacy Overview This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website.
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