2017年8月30日 · Muscles that perform flexion, extension, right lateral flexion, and/or left lateral flexion must have a vertical component to their fiber direction. Muscles that perform right or left rotation must have a horizontal component to their fiber direction; in fact, it can be helpful to view them as partially “wrapping” horizontally around the trunk.

The complex anatomy of the lumbar region is a remarkable combination of these strong vertebrae (with their multiple bony elements) linked by joint capsules, and flexible ligaments/tendons, large muscles, and highly sensitive nerves.

The three movements in the spine are flexion, extension, rotation and lateral flexion. These movements occur as a combination of rotation and translation in the sagittal, coronal and horizontal plane. Movements result in force, a force simply being a push or pull. Motion is created and modified by the actions of forces.

2023年11月3日 · Numerous muscles, ligaments and tendons support the spine, providing it with flexibility and a great range of motion. The vertebral column is formed by a series of vertically aligned vertebrae. Vertebral alignment produces 4 curvatures of the vertebral column; cervical lordosis, thoracic kyphosis, lumbar lordosis and sacral kyphosis.

2019年5月15日 · Muscles are named according to their shape, location, or a combination. They are further categorized according function such as flexion, extension, or rotation. Muscles and ligaments work...

It provides coverage for the organs, generates intra-abdominal pressure, and moves the vertebral column. This article discusses the key anatomical structures of the lumbar vertebrae and abdominal wall, including the bony structures, articulations, ligaments, muscles, nerves and the vascular supply.

The muscles of your lower back and flexibility of your lumbar spine allow your trunk to move in all directions — front to back (flexion and extension), side to side (side bending) and full circle (rotation), as well as twist. The last two lumbar vertebrae allow for most of this movement. Protects your spinal cord and cauda equina.

2023年7月12日 · They provide stability to the spine and help to resist excessive flexion (forward bending) and extension (backward bending). Transversospinalis Muscles: The transversospinalis muscles are a group of deep muscles located in the back. This group includes the semispinalis, multifidus, and rotatores muscles.

The primary muscles involved with producing lumbar flexion are the Rectus Abdominis, internal oblique, and external obliques. The nerves that innervate the Rectus Abdominis are the Intercostals (7-11) and Subcostal (T12).

2023年8月17日 · Lumbar flexion refers to the forward bending movement of the lower spine, specifically the lumbar region. The main lumbar flexor muscles include the Psoas major, Iliacus, Rectus abdominis, Tensor fasciae latae, and External obliques. On average, the normal range of lumbar flexion is approximately 40 to 60 degrees.