Phin774,

Welcome to NeuroTalk.

A car seat has far too much shock absorption to cause a concussion from sitting down hard.

I did the numbers long ago. An 8 inch drop with 1/8th inch deflection would be 64 G's. With 1/4 inch deflection, the G's would be 32. With 1/2 inch deflection, the G force would 16 G's or less. A car seat has more than an inch of distortion, much more with a drop. At one inch, the G force would be 8. Stepping off a curb is 8 G's. If you can walk around and go up and down steps, you experience this force many times each day. This is not even a sub-concussive force.

btw, If your back and/or neck was bent, even more energy was absorbed. The curves in the back and neck are very good at absorbing impact forces.

What are you doing to help with your health anxiety ?

Why are you focused on head/brain injuries ? Did you have a personal experience ?