what muscles laterally flex the trunk

What muscle flexes and laterally flexes the trunk?

Quadratus lumborumQuadratus lumborum is involved in extending the trunk and flexing it laterally to the ipsilateral side. These actions are possible due to inputs provided by the subcostal nerve and the anterior rami of the L1-L4 spinal nerves. Want to learn more about the muscles of the abdominal wall?

What is the flexion of the trunk?

A movement that returns the trunk to the anatomical position from trunk extension or produces a forward movement of the spine.

What muscle turns the trunk from side to side?

external oblique musclesThe external oblique muscles allow the trunk to twist, but to the opposite side of whichever external oblique is contracting. For example, the right external oblique contracts to turn the body to the left. internal oblique muscles – these flank the rectus abdominis and are located just inside the hipbones.

What is lateral flexion of trunk?

Takeaway. Lateral flexion involves bending a body part, mainly your torso and neck, sideways. This type of movement can be affected by back injuries and other conditions. You can improve your lateral mobility with stretches and exercises focused on increasing flexibility in your back.

What is lateral trunk stretch?

Stand with your feet shoulder width apart and place one hand on your hip. Extend the other hand into the air, leaning over to the side while you increase the stretch by pushing your hips in the opposite direction. Hold this position before you repeat on the other side.

What does the multifidus do?

The multifidus muscles produce extension of the vertebral column. They also generate some rotation of the vertebral bodies away from the side of contraction, and they are also active in lateral flexion of the spine.

What does the latissimus dorsi do?

Latissimus dorsi works collaboratively with the teres major and pectoralis major to perform actions of the upper extremity. Together, these muscles will work to adduct, medially rotate, and extend the arm at the glenohumeral joint.

Which is the most effective trunk muscle for producing ipsilateral lateral trunk flexion?

Contracting unilaterally, the more laterally disposed iliocostalis muscles are the most effective lateral flexors of the erector spinae group.

Which muscles are involved in lateral flexion?

The primary muscles involved in lateral flexion of the torso are the internal and external obliques, the quadratus lumborum and the erector spinae. Other muscles -- including the rectus abdominis, iliopsoas and semispinalis -- assist with the movement. When these muscles contract on the right side of your body, you bend to the right; when they contract on the left side of your body, you bend to the left.

What is the function of the facet joints in the spine?

The facet joints in your thoracic and lumbar spine allow you to laterally flex your torso. When you bend to the right, the bottom of one vertebra slides down against the top of the vertebra below it on the right side of your body. This compresses the disc that lies between the two vertebrae and decreases the space between the vertebrae. On the left side of the facet joint, the space between the two vertebrae increases.