What are the trunk muscles?

What are the trunk muscles?

The muscles of the trunk include those that move the vertebral column, the muscles that form the thoracic and abdominal walls, and those that cover the pelvic outlet. The erector spinae group of muscles on each side of the vertebral column is a large muscle mass that extends from the sacrum to the skull.

What back muscles rotate the trunk?

Trunk rotation is a key risk factor for low back pain1, 2). During rotation, the external oblique (EO), rectus abdominis (RA) and lumbar multifidus (MF) muscles act contralaterally, whereas the latissimus dorsi (LD), internal oblique (IO) and transversus abdominis (TrA) muscles act ipsilaterally3,4,5,6).

What muscle flexes the trunk?

Rectus abdominis
Rectus abdominis flexes the trunk. If you shorten the front of the body and round forward (just like you do in the abdominal crunch), you will feel it working. We shouldn’t do too much of that without balancing it out with other actions. Erector spinae muscles extend the spine.

What are the deep trunk muscles?

The deep trunk muscles are the transversus abdominis, multifidus, quadratus lumborum, and the rotator muscles. Muscles located in the deep parts of the trunk increase trunk stability, maintain spinal posture, engage in respiration, adjust unconscious movements, and maintain proper posture3,4,5).

Does the trunk include the back?

The trunk includes the chest (in front), the back, the shoulders and the abdomen. The internal organs which we cannot see, are the heart, the lungs, the stomach, the liver with the gall-bladder, the pancreas, the spleen, the kidneys and the small and large intestines (bowels). The arms and legs are called the limbs.

What is trunk body part?

A: The trunk is the main part of the body. It does not include the head or the limbs but everything in between (front to back, top to bottom). The thorax is also known as the chest. It is between the neck and the bottom of the ribs.

What is a trunk rotation?

Trunk rotation is a movement that involves the thoracic and lumbar vertebrae and surrounding muscles including: External oblique, side abs that help rotate the trunk. Rectus abdominis, flexes the torso and spine. Lumbar multifidus, helps stabilize the spine. Internal oblique, helps rotate and turn the trunk.

What are two of the major lower torso trunk muscles?

Key Takeaways

  • The intercostal muscles form the chest wall and function in respiration.
  • The diaphragm is a sheet-like muscle that extends underneath the rib cage and aids in respiration by physically moving the lungs.
  • The obliques are abdominal muscles that assist during bending and twisting of the torso.

Where is the trunk in human body?

Trunk or torso is an anatomical term for the central part of the human body from which extend the neck and limbs. The trunk includes the thorax and abdomen.

Is trunk and torso the same thing?

As nouns the difference between torso and trunk is that torso is the part of the (human) body from the neck to the groin, that is, the body excluding the head and limbs while trunk is the (usually single) upright part of a tree, between the roots and the branches: the tree trunk.

What is your trunk area?

Trunk or torso is an anatomical term for the central part of the human body from which extend the neck and limbs. The trunk includes the thorax and abdomen.

What is trunk rotation good for?

By doing the lower trunk rotation, you will work on increasing flexibility in your low back (lumbar spine) and hips, allowing for greater mobility and rotation in the spine.