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Many of us struggle with tightness, weakness or pain in their lower backs or hips. We take a look at four muscles – the psoas, iliacus, quadratus lumborum and the piriformis - for some answers. by Jennilee Toner.
Your back muscles start just under your skull, cover your shoulders and run to just above your hips. What are the muscles of the back? Your back has many different muscles. Some support your spine and trunk (your midsection or torso). Others help you stand up, maintain your posture and help you move. Some even help you breathe. Advertisement.
The psoas muscles on either side of your spine run from your lower back to your hips. You might never think about them, even though you use them constantly throughout your daily routine. They help your body maintain its posture and move your legs and hips.
The iliacus muscle is the triangle-shaped muscle in your pelvic bone that flexes and rotates your thigh bone. The iliacus is one of the most important hip flexor muscles in your body. It works with the other muscles in the hip and thigh to help you bend, run, walk, sit, and maintain correct posture.
The muscles of the back are a group of strong, paired muscles that lie on the posterior aspect of the trunk. They provide movements of the spine , stability to the trunk, as well as the coordination between the movements of the limbs and trunk.
Your back muscles support your spine, attach your pelvis and shoulders to your trunk, and provide mobility and stability to your trunk and spine. The five major muscles of the back are the trapezius, latissimus dorsi, the rhomboids, the erector spinae, and the levator scapulae.
Attachments, innervation and functions of the superficial muscles of the back. The back is the body region between the neck and the gluteal regions. It comprises the vertebral column (spine) and two compartments of back muscles; extrinsic and intrinsic.
Videos. Quizzes. Both. Hip and thigh muscles. Author: Alexandra Osika • Reviewer: Francesca Salvador, MSc. Last reviewed: September 11, 2023. Reading time: 27 minutes. Recommended video: Inner hip muscles [09:58] Origins, insertions, innervation and functions of the inner hip muscles.
Weak abdominal muscles cause hip flexor muscles to tighten causing an increase in the curve of the low back. An unhealthy posture results when the curve is overextended called lordosis or swayback. Proper posture corrects muscle imbalances that can lead to low back pain by evenly distributing weight throughout the spine.
Within this group of back muscles you will find the latissimus dorsi, the trapezius, levator scapulae and the rhomboids. These muscles are able to move the upper limb as they originate at the vertebral column and insert onto either the clavicle, scapula or humerus.