Abdominal muscles origin and insertion

Is a sheet of internal skeletal muscle extends across the bottom of the thoracic cavity separates the thoracic cavity from the abdominal cavity performs an important function in respiration. Anterior half of the iliac crest.

RESPIRATORY MUSCLES OF CARNIVORES Diaphragm.

Abdominal muscles origin and insertion. The muscle originates as two tendinous head a Lateral head from the lateral part of the pubic crest b Medial head from the anterior pubic ligament. The muscle inserts on the front of the wall of the thorax along a horizontal line passing laterally from the xiphoid process and 7th 6th and 5th costal cartilages. Origin Insertion Action Nerve Supply.

The abdominal muscles of the external abdominal obliques internal abdominal obliques rectus abdominis and the transversus abdominis form the anterior and lateral abdominal wall. Working together these muscles form a firm wall that protects the viscera and they support to maintain the. Rectus abdominis informally known as the abs muscle is a long muscle of the anterior abdominal wall.

In those with low body fat it is clearly visible beneath the skin forming the six pack. It extends from the rib cage all the way to the pubic bone. Rectus abdominis belongs to the anterior abdominal muscles together with pyramidalis muscle.

These are on each side of the rectus abdominis. The external abdominal oblique muscle is the largest and most superficial of the four muscles and lies on the sides and front of the abdomen. Lower eight ribs 5th 12th Insertion.

Anterior half of the iliac crest. They are enclosed in the rectus sheath and enveloped by the aponeuroses of the lateral abdominal muscles as they pass to insert onto the linea alba. Located along the anterior length of the rectus abdominis muscle are three horizontal bands of connective tissue called tendinous intersections.

The tendinous intersections attach to the rectus sheath as it envelopes the muscle separating it into. The fibres of this muscle are directed downwards and backwards. It is having muscular and aponeurotic parts.

The lateral faces of ribs extending from the lower part of the fifth rib to the last rib above its middle and the lumbo-dorsal fascia. Linea alba prepubic tendon and tuber coxae. Costal cartilages of inferior six ribs.

Increases the intraabdominal pressure during forced expiration. Thoraco-abdominal nerves anterior rami of T7-T11 subcostal nerve and first lumbar nerve. OriginInsertion of Muscles - Core Muscles Transverse Abdominis and Rectus Abdominis Your Core Muscles are used to stabilise the pelvis during dynamic movement and stabilising and movement of the spine and pelvis.

By stabilising the spine you are decreasing the risk of back injury. Abdominal aponeurosis to linea alba xyphoid. Muscles of the Abdomen Table 116 Movement Target Target motion direction Prime mover Origin Insertion.

Also bending to the side. Muscle Name Origin Insertion Action Innervation Muscles of Upper Extremity Pectoralis Major Medial half of clavicle front of sternum costal cartilage Crest of greater tubercle Lateral lip of bicipital groove Horizontally adduct medially rotate at shoulder Medical and lateral pectoral. Crest of pubis and pubic symphysis.

Cartilage of 5th - 7th ribs and xiphoid process. External surface of lower 8 ribs. Anterior part of iliac crest and by abdominal aponeurosis to l.

It has its origin in the transverse process of the lumbar vertebrae and internal iliac fossa. Lesser trochanter of the femur. Muscle made up of two bellies.

It is located on the thigh and has a triangular shape. Its function is the retroversion of the pelvis keeping the spine stable. 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. The pubic symphysis is the cartilage that makes up the mid-line of the front of the pelvic bone.

The rectus abdominis originates from the pubic crest and the pubic symphysis both. In simple terms when a muscle shortens the point of origin stays still whilst the point of insertion moves. For example the abdominals are attached to the pelvis and the sternum.

When the abdominals shorten for example when we perform a sit-up it is the sternum which moves the most this is the point of insertion. Anterior and lateral cricoid cartilage. Inferior cornu and lamina of the thyroid cartilage.

External laryngeal branch of the vagus. Tension and elongation of the vocal folds has minor adductory effect Arytenoid. Arytenoid cartilage on one side.

Arytenoid cartilage on opposite side. RESPIRATORY MUSCLES OF CARNIVORES Diaphragm. Is a sheet of internal skeletal muscle extends across the bottom of the thoracic cavity separates the thoracic cavity from the abdominal cavity performs an important function in respiration.

As the diaphragm contracts the volume of the thoracic cavity increases and air is drawn into the lungs Dog Thorax contents of Thoracic Cavity. The rectus abdominis is the large muscle in the mid-section of the abdomen. It enables the tilt of the pelvis and the curvature of the lower spine.

Next to it on both sides of the body is the. The quadratus lumborum arises from the iliac crest and inserts into the 12th rib and transverse processes of the lumbar vertebrae. Diaphragmatic and transverse abdominal fibers interlace.

The psoas and quadratus lumborum pass behind the diaphragm under the medial and lateral arcuate ligaments. MUSCLES OF BACK IN SITU. Insertion INTERNAL ABDOMINAL OBLIQUE - A.

Action Same as external oblique except that unilateral contraction causes ipsilateral rotation of waist. Pubis Name the muscle A. Muscles of the Abdominal Region - Listed Alphabetically.

Muscle Origin Insertion Action Innervation Artery Notes Image. Forms thin network of muscle fascicles around the spermatic cord and testis or around the distal portion of the round ligament of the uterus. It is an incomplete muscle layer and crosses more than one intercostal space.

These muscles assist in the function of external and internal intercostal muscles. From the costal groove of the rib above and. The superior border of rib below.

All the intercostal muscles are supplied by their respective intercostal nerves. Origin and Insertion of the TA. All voluntary muscles have an origin and an insertion and the TA is no exception.

In most cases one end of the muscle the origin is still while the other end.