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Function of ribs

2019-04-16 10:29:59 2000

What do you think about ribs?

We know that ribs, when we breathe, produce a rise in the chest.

But besides breathing?

If we look closely at the trunk of our body


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We will find that our trunk is a cylinder.

To maintain the stability of the trunk, the whole cylinder should also be maintained.

And if we look at the skeleton of our bodies


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You will find that the columnar body is empty in the lower half, supported by the previously mentioned intra-abdominal pressure.

The upper half is supported by ribs.

PS: The relationship between intra-abdominal pressure and lower body

You will find that the columnar body is empty in the lower half, supported by the previously mentioned intra-abdominal pressure.

The upper half is supported by ribs.

PS: The relationship between intra-abdominal pressure and lower body


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See here, you will know that ribs are actually the basis of upper body trunk stability!

And this foundation is connected to the thoracic spine to stabilize the upper body.

Does upper body stability matter?

If the stability of the lower half of the body (intra-abdominal pressure) will affect the efficiency of lower limb output

Conversely, upper body stability affects arm productivity

PS: The relationship between intra-abdominal pressure and lower extremity efficiency

The ribs are connected to the thoracic spine, so they affect each other.

Let's just talk about ribs today.

How can the ribs remain stable?

Just as intra-abdominal pressure is stable, there should be good expansion.

Like a balloon, he should expand 360 degrees outward to exert the same pressure in all directions.

Static and dynamic stability are obtained.

But if you break it down one by one, it actually contains four actions.



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A. Pump Handle

Rib lifting action, this action like a pump handle to lift the entire rib up, this action will have more ribs.

B. Bucket Handle

The rib pulls out. This action expands the rib outward like a bucket pull. There are more lower ribs.

C. Caliper Motion

Occurring on floating ribs 11 and 12, the ribs expand backwards.

D. Torsion

It's kind of like a twist. The ribs are elastic and they deform.

As we rotate to the right, the upper and lower thoracic vertebrae connecting the ribs begin to move.

When the upper thoracic spine rotates to the right, the lower thoracic spine remains motionless.

The ribs are still attached to the upper and lower thoracic spine and the front sternum.

So the ribs twist and the opposite ribs twist in the opposite direction.

When the thoracic spine turns back, the ribs return to their original shape.

Note: The above actions will not occur alone. There are pump handle and bucket handle and rotation in the ribs 1 to 10, but the proportion is different.Even though the 11 and 12 ribs have bipedal movement, he will increase with the bucket handle movement.




When one of the directions of the ribs is limited, it will affect the movement of the surrounding ribs, resulting in the loss of function of the ribs.

And rib failure can affect four things.

1. Reverse effect on thoracic spine rotation and stability

2. It directly affects the stability of upper body and the efficiency of upper limbs.

3. Influencing breathing: The most direct reason why ribs can't expand is that you can't breathe smoothly. At this time, your body will exert more energy in order to get enough oxygen.

4. Influencing diaphragm and intra-abdominal pressure: Ribs in the wrong position, attached to the diaphragm and transverse abdomen naturally can not exert a good force can not provide stable intra-abdominal pressure spinal stability decline last upper body instability affects lower body instability.


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