Question

Which muscle is classified as a local muscle involved in stabilizing the spine?

A) Rectus abdominis
B) Latissimus dorsi
C) Transversus abdominis
D) Multifidus

Answer 1

The muscle involved in stabilizing the spine is the Multifidus, which assists in the extension and lateral flexion of the vertebral column.

Step-by-step explanation:

The muscle classified as a local muscle involved in stabilizing the spine is D) Multifidus. The multifidus is a deep muscle of the back that extends through the thoracic to the lumbar regions, helping with the extension and lateral flexion of the vertebral column as well as stabilization.

It is one of the segmental muscles that include interspinales and intertransversarii, which together contribute to the stability of each vertebral segment.

On the other hand, the rectus abdominis helps with movements such as flexing the lumbar spine but not principally in stabilization; the transversus abdominis also provides support but mainly acts as a compressor for the abdominal contents, and latissimus dorsi is a large muscle on the inferior back that is more involved in movements of the shoulder.

Answer 2

The Transversus Abdominis is the local muscle classified as being involved in stabilizing the spine. It is a deep abdominal muscle responsible for maintaining posture, supporting abdominal organs, and compressing the abdominal cavity. Option C) Transversus abdominis is the correct answer.

Step-by-step explanation:

The muscle classified as a local muscle involved in stabilizing the spine is the Transversus Abdominis. This deep layer muscle of the abdomen has fascicles arranged transversely around the abdomen, acting like a corset to provide stability to the trunk and spine.

This muscle not only supports abdominal organs but also plays a crucial role in maintaining posture and protecting the internal organs by compressing the abdominal cavity.

The Transversus Abdominis is part of the anterolateral abdominal wall, which consists of four muscle groups: the external obliques, the internal obliques, the Transversus Abdominis, and the rectus abdominis.

Amongst these, the Transversus Abdominis is the deepest muscle and most significant contributor to vertebral and pelvic stability. It is an integral component of the core muscle group that collectively assists in balancing the body and maintaining upright posture.