What is the large flat muscle on the sides of the abdomen?

What is the large flat muscle on the sides of the abdomen?

External obliques: The external obliques are a pair of muscles, one on each side of the rectus abdominis. They are the largest of the flat muscles and at the bottom of the stack. They run from the sides of your body toward the middle. The external obliques allow the trunk to twist side to side.

What do you call the flat muscle of the abdomen?

Abdominal muscle, any of the muscles of the anterolateral walls of the abdominal cavity, composed of three flat muscular sheets, from without inward: external oblique, internal oblique, and transverse abdominis, supplemented in front on each side of the midline by rectus abdominis.

What muscles extend the trunk?

TRUNK EXTENSION Extension is primarily the product of bilateral action of the thoracic and lumbar erector spinae, semispinalis, with some assistance provided by the deep posterior spinal muscles.

What is the long tendon that runs down the middle of the rectus abdominis?

In humans, the linea alba runs from the xiphoid process to the pubic symphysis down the midline of the abdomen. The name means white line as it is composed mostly of collagen connective tissue, which has a white appearance. It is formed by the fusion of the aponeuroses of the muscles of the anterior abdominal wall.

What are flat muscles?

[TA] broad, relatively thin, sheetlike muscle, for example, muscles of the anterolateral abdominal wall (external and internal oblique, transversus abdominis).

What Aponeurosis means?

aponeurosis, a flat sheet or ribbon of tendonlike material that anchors a muscle or connects it with the part that the muscle moves. The aponeurosis is composed of dense fibrous connective tissue containing fibroblasts (collagen-secreting spindle-shaped cells) and bundles of collagenous fibres in ordered arrays.

What aponeurosis means?

What is trunk extension?

Trunk extension exercises are used to train endurance and strength of the trunk extensor muscles. A shift from a differential recruitment between the thoracic and lumbar extensors at low intensities to a more homogenous recruitment at high intensities is observed during semi-seated trunk extension exercises.

What are anterior muscles?

Anterior Muscles. The anterior muscles of the torso (trunk) are those on the front of the body, including the muscles of the chest, abdomen, and pelvis.

What is the name of the ligament that runs vertically down the middle of the abdomen?

Linea alba
Linea alba (Latin ‘white line’) is a tendinous, fibrous raphe that runs vertically down the midline of the abdomen.

What is Pyramidalis muscle?

Pyramidalis is a small triangular muscle located anterior to the lower part of rectus abdominis muscle within the rectus sheath. It is attached by tendinous fibres to anterosuperior margin of pubis and by the ligamentous fibres in front of the pubic symphysis.

What is the large flat muscle?

It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. Upon exhalation, the diaphragm relaxes and returns to its domelike shape, and air is forced out of the lungs.

What are the names of the flat muscles?

The three anterolateral flat muscles (obliques and transversus abdominis) form an aponeurosis on both sides that is a broad flat tendon called rectus sheat, enclose the rectus abdominis, and consists of two layers anterior and posterior layer.

Where are the muscles located in the abdominal wall?

Muscles of the anterior abdominal wall consists of two vertical muscles located on the midline and bisected by linea alba; Rectus abdominis and pyramidalis and three flat muscles on the anterolateral side arranged from superficial to deep; external abdominal oblique, internal abdominal oblique, transversus abdominis.

Which is the deepest abdominal muscle in the body?

Transversus abdominis is the deepest of the abdominal muscles, it is an important core muscle and its primary function is to stabilise the lumbar spine and pelvis before movement of the lower and /or upper limbs occur.

Is the rectus abdominis a postural or core muscle?

Rectus abdominis is a long strap muscle that extends the entire length of the anterior abdominal wall lies close to the midline, it is an important postural and core muscle. With a fixed pelvis, contraction results in flexion of the lumbar spine. When the ribcage is fixed contraction results in a posterior pelvic tilt.