Two parts: Take a moment to check in on your head position. An easy way to do th

Question

Two parts:

Take a moment to check in on your head position. An easy way to do this is to consider where your ears are relative to your shoulders. For more detailed context, you can check out this video https://www.youtube.com/watch?v=jRozBCFU_pA. In biomechanical terms, why is it advantageous to avoid a forward head posture in favor of a more neutral alignment?

Torque due to COM of the skull is greater in neutral than with the head forward.

OR

Torque due to COM of the skull is greater with the head forward than in neutral.

If my head is 4.5kg, the moment arm from COM of my skull is 2cm, and the moment arm of the splenius capitis muscle is 4cm, what force does the splenius capitis have to exert to hold my head still in neutral?

Explanation / Answer

Torue balance

To be in neutral position:

Torque = force x [perpendicular distance from the axis of rotattion]

4.5*2=4x

F= 2.25 N Answer

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