sounds exactly like spasticity/clonus, esp related to the application of pressure on the ball of the foot. that's just how my physio used to test my spasticity back in the day - press on the balls of my feet and count the 'beats'.
READ ME key info on nutrient targets - www.thisisms.com/ftopict-2489.html
my approach: no meds so far - just nutrient-dense anti-inflammatory whole foods, and supplements where needed
info: www.whfoods.com, www.nutritiondata.com