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Musculus rectus abdominis (xlas)

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Synonyms: abs; rectus abdominis muscle; straight abdominis muscle; six pack; six-pack; sixpacksixpack; rectus

not final

Summary

The Musculus rectus abdominis,abdominis, often referred to as "abs"abs" (short for "abdominal muscles"), sits in front of your stomach and is visible on trained and low body fat people. ItsIn fact, there are two individual muscle cords right next to each other (that's why I'll refer to them in plural). Besides being used for bendingbreathing the muscles also bend the torso and liftinglift the pelvis forward - thus the abs are the main antagonist of the spine stretcher (M. erector spinae)spinae). There are tendons that separate the long muscle cords into packs for better muscle contraction precision.

What is the most relevant information that everyone needs to know?
Try to include the full latin name, where the muscle is, what it does and whats significant about it.

Visual Introduction

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Origin

  • Cartilage of the 5th, 6th and 7th rip (there is cartilage at the front tip of each rip)
  • Some muscle fibers connect to the breastbone (Sternum)Sternum)

Insertion

  • Pubic bone (Os pubis), more specifically on the superior pubic ramus (Ramus superior; ramus = branch)
  • Pubic symphysis (Symphysis pubica), thats the cartilage between the two pubic bones

*insert drawing for origin and insertion*
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Functions

The

    abs are used for bending
  • Bending and crunching the torso forward.forward; Therethe familiar "sit upup" motion represents itsthis function pretty well.

    well
  • Lifting/twisting the pelvis forward
  • Breathing control; the abs are used mainly for exhaling

What is this muscle used for?

Different Viewpoints

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Details

Everything beyond the basics

The tendinous intersections (Intersectiones tendineae) determine how many packs you can have. Most people (around 60%) have 3 intersections which equals to6 6possible packs. In some media you see people with 8 packs to empathize their strength. In reality only 20% even have 4 intersections,intersections = 8 packs, which means its based on luck (genetics) if you are even able to develop an 8 pack.

 

What is also important if one wants to study this muscle beyond the basics?
Go over the muscle more in detail and share intermediate up to expert knowledge.
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Reference Pictures (for study only)

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Check out this page for resources and explanation

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