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One of the main muscles of movement.

Keeping it simple: rectus abdominis.

Anatomy in detail.

RECTUS ABDOMINIS

the rectus abdominis muscles and the midline linea alba from pubic symphysis to costal cartilages of teh ribs. Pelvis to chest our central line like two parallel stacks of muscle panels to be activated and elongated in sequence extending from our base pelvic floor.

The left and right rectus abdominis muscles run parallel to each other, up the front of the abdomen from pelvis to chest.

rectus straight

abdominis abdomen

The rectus abdominis muscles are the 'Line' of our Base-Line muscles and are separated by the linea alba, our primary guide for body alignment.

The rectus abdominis muscles attach to:

rectus abdominis muscles front and back view
rectus abdominis made up from panels of muscle

The rectus abdominis muscles consists of several “panels” of muscle between strips of connective tissue known as tendinous intersections.  These sections of muscle are what gives the rectus abdominis the “6-pack” look, but the number of panels can vary between individuals - 4, 8, and 10 packs can occur.

Like two parallel stacks of blocks to be activated in sequence extending from your pelvic floor Base.

Longer and stronger with every breath in.

Your core pillar of strength.

the rectus sheath containing the rectus abdominis muscles, formed from the aponeuroses of the lateral abdominal muscles on their way to meeting midline to form the linea alba. The rectus abdominis muscles threading through the sheath.

Each rectus abdominis lies within its rectus sheath - A 'tunnel' made from the aponeuroses (thin sheets of strong connective tissue) of the lateral abdominal muscles (the external abdominal oblique, internal abdominal oblique and transversus abdominis) before they merge with the linea alba at the front of the abdomen .

The rectus abdominis muscles should be engaged and elongated, the 'upright' muscles that can support the rest of body when used correctly.

The lateral abdominal muscles are 'brought into line' and balanced when their rectus sheaths are smoothed and extended.

More info. on the rectus abdominis:

source Narayanan VK, Peter S, Nair AJ. The rectus abdominis muscle in males and females of Keralaa cadaveric study. J. Evid. Based Med. Healthc. 2017; 4(46), . DOI: 10.18410/jebmh/2017/556  Journal of Evidence Based Medicine and Healthcare, Volume 4, Number 46, 2804-2810 2017.

It has a tendinous origin and a muscular insertion.

It arises by two tendinous heads: Medial head arises from the anterior surface of the pubic symphysis and the lateral head arises from the lateral part of the pubic crest and the pubic tubercle.... The origin was seen to be tendinous and narrow and remained tendinous up to 3 cm from its origin. Pyramidalis muscle when present was seen overlapping this part of rectus abdominis.

The muscle is inserted on the anterior thoracic wall by four fleshy slips that are attached in a horizontal manner to the lower part of the anterior thoracic wall - along a horizontal line passing laterally from the xiphoid process and cutting in that order, the 7th, 6th and 5th costal cartilages.

The paired recti muscles are separated in the median plane by the linea alba.

The muscle is three times as wide superiorly as inferiorly. It is broad and thin superiorly and narrow and thick inferiorly.

An increase in length of 1 to 2 cm in the left rectus abdominis was seen in all the 20 cadavers, which was a striking feature

The rectus abdominis is enclosed in the rectus sheath, which is formed by the aponeuroses of the anterolateral muscles of the anterior abdominal wall.

The muscle usually presents tendinous intersections along its length. ... The absence of tendinous intersections in the foetal specimens could imply that they fully develop after birth, probably after the child becomes ambulant.

Aim to engage and elongate each rectus abdominis muscle along its entire length extending from the Base pelvic floor muscles.

Paired sections of muscle to be activated in sequence up to your chest.

Find your Base-Line.   Feel how to heal.

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Movement should not be painful.

 OPTIMISING THE USE OF YOUR MUSCLES = BETTER HEALTH.

ALWAYS START FROM BASE-LINE, ALWAYS GO BACK TO BASE-LINE.

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