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Your back muscles work together to allow you to bend over, twist, turn your head and extend your back. They also help you breathe by expanding and contracting your chest when you breathe in (inhale) and out (exhale).
The muscles of the back can be arranged into 3 categories based on their location: superficial back muscles, intermediate back muscles and intrinsic back muscles.
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.
They provide movements of the spine, stability to the trunk, as well as the coordination between the movements of the limbs and trunk. The back muscles are divided into two large groups: The extrinsic (superficial) back muscles, which lie most superficially on the back.
Anatomy. The back comprises the spine and spinal nerves, as well as several different muscle groups. The sections below will cover these elements in more detail. Spine. The spine is composed of...
The muscles of the back can be classified as either deep, intermediate and superficial. Each of these 3 classes have distinct roles in support, movement and/or aiding in specialised functions such as in inspiration/expiration.
Your back muscles extend from the bones of your neck (cervical vertebrae) to your lower back (lumbar spine) and then to the base of your lumbar spine (sacrum) and tailbone (coccyx). Some of these muscles are quite large and cover broad areas, e.g. large areas of the trunk.
Your back consists of three distinct layers of muscles: The superficial (extrinsic) layer. The intermediate layer. The intrinsic (deep) layer. These layers of back muscles help mobilize and stabilize your trunk during your day-to-day activities.
This video provides an overview of the muscles of the back (superficial, intermediate and deep) using high-quality 3D anatomy models and expert narration from our brilliant anatomists. ...more.
There are three major groups of back muscles: Superficial: attached to the shoulder girdle. Intermediate: attached to the posterior thorax. Deep: attached to the vertebral column, also known as the intrinsic muscle group [1]