The case in that thread was jumping and hitting the head into the ceiling. That is not a very light hit. A dinger would be the same as what researchers call a sub-concussive impact. There is an awareness of bumping the head or suffering an impact but no concussion symptoms, either immediately or later.

S is that very small distance. It is the deflection distance or thickness of the cushioning. It is very difficult to determine but the starting velocity is also difficult to determine. A falling object has a known velocity based on the acceleration of gravity but a horizontally moving object requires some sort of metering of the horizontal speed. A slow walking speed of 3 mph is 134 cm/sec. 134 squared is 17956. If there is 1 mm (.1 cm) deflection, then you would divide the 17956 by .2 divided by 980 cm/sec/sec to get 91.6 G's. If the deflection was 1 cm, then you would divide that by 2 (2 times deflection of 1 cm) and the G force would be 9.16 G's. If the deflection was .25 cm then the G force would be 36.32 G's.

If the 3 mph speed (134 cm/s) was not directly at the wall, you would need to calculate the velocity vector perpendicular to the wall. At 45 degrees, the speed perpendicular to the wall would be 2.1 mph (94 cm/s). At 1 mm (.1 cm) deflection, then, 8798 divided by .2 divided by 980 is 44.9 G's. You need to make sure everything is in the same units: meters, centimeters or millimeters.

At the 1/2 mph speed (.13734 m/s) you used with 1 mm deflection, the G force would be 0.96 G's. That is like gently lying down on a hard surface. Your head at rest would be 1 G.

The deflection is the amount of distance the glass door or wall moved combined with the flexing of your skull. If the total deflection was .5 mms, then the G force would be 1.96 G's. If the deflection was .25 mms, the G force would be 3.85 G's.

If you could measure it, you would find that a glass pane has quite a bit of flex. Just watch the reflection off a glass pane during a wind storm. The pane will bow in and out. Plus, there would be some movement in the glass frame in the door track. Even a wall has flex.

I would think that CSF would be considered in the deflection.

As I said in the other thread, any sound is the result of deflection. A brick wall will not make a sound but the skull will make a thud as it deflects.

Hi Katharsis,

I'm just wondering if discussing this actually helps calm your anxiety or does it make it worse and you worry more?

Sometimes it is hard to let go, but all this calculating and trying to figure out technical possibilities & scenarios...... that alone is a big strain on the brain when you should be letting it rest...:grouphug:

Thanks for your honest answer.

I was asking because I too have anxiety issues and that was long before head injuries. Born that way ;)

I love to learn and figure things out and sometimes working things out will help me but other times it will make me more anxious because it can almost feel as if it's feeding my anxiety. That is why I asked the question.

It's good you're going to see a professional to help you with your anxiety.

All they have to do is give me the parameters and I will do the calculation. One of the common ways to overcome anxieties is to demonstrate the truth that overcomes the irrational thoughts.

I and an number of others use our Christian faith to reduce our anxieties. It may be a continuing battle but it is effective. Anybody can PM me for how I specifically use my faith to overcome anxiety. Discussing faith in the main forum has not always been well received.

Difficult question.

After the concussion I had around 10 years ago, my anxiety became much worse. I have residual vertigo that has become much better now, but it was quite bad for a number of years. That really was the thing that made me worse because I became afraid of falling again.

I watched every step and feared so much going through it all again. The fact is that it was my fear/anxiety that made me disabled more than the concussion did. I stopped living my life for a while there. I was afraid to drive and afraid to go to shopping centres with slippery floors.

I was afraid of wet concrete. You name it and I was afraid.
IMHO, they were not irrational fears. They are rational fears because a. I had fallen and b. I didn't want it to happen again.

Because I've always had this background anxiety disorder (mostly I just work around it) I was having panic attacks all the time. Not good!

I have in the past had treatment for anxiety and obsessive compulsive issues but I refuse to ever take medication again so I've tried more alternative routes. I use supplements and I practice relaxation techniques and attempt to meditate regularly although that is difficult with all the background chatter going on in my brain sometimes. ;) I don't relax enough mentally but I'm much better than I was.

If anxiety reaches a point in your life when it is affecting your daily life, then it's really important to seek help dealing with it. There are many ways doctors treat anxiety and it doesn't just mean taking medications. Cognitive Behaviour Therapy can help us recognize the patterns we have learned with our thought processes and with guidance, they can be changed.

It's all very individual.

p.s. I think you wrote in your first post that you were at university.
Does your University offer any help for students who are facing health issues such as this? That is worth investigating as it may help you keep on track with your studies and at the same time you will have support and maybe accommodations set in place in your learning environment.

Now that is a big topic for discussion!!
Lots of folks have that very same issue.

Simple non medicated ways to mellow out / relax for best sleep..

This may sound silly but have you ever watched Indian head massage or hair brushing /ASMR videos on you tube?
There are other relaxing videos that you can find - like waves, rivers, soft music.
Some are specifically to help you fall asleep and sleep well..