I think mrsD gave you good advice. The jumping could be as traumatic as the palm fronds. I can understand how the palm fronds feel painful. It's like being hit with little bars. But, I don't think you could consider these hits to be sub-concussive impacts. The speed of contact is just not enough. When a frond falls, it is going much faster and you can be hit by the thick part at the base of the frond. Then, it can be like what the timber industry calls a 'widow maker.' But, at the speed you make contact going up the stairs, it's just not enough speed.

If you are causing your brain to bounce around by running and jumping, that could slow your recovery. I doubt it will cause new damage, just a delay in recovery.