The neuromuscular junction is the site of the signal exchange. The steps of this process in vertebrates occur as follows:(`) The action potential reaches the axon terminal. (2) Voltage-dependent calcium gates open, allowing calcium to enter the axon terminal.he neuromuscular junction is the site of the signal exchange. The steps of this process in vertebrates occur as follows:(`) The action potential reaches the axon terminal. (2) Voltage-dependent calcium gates open, allowing calcium to enter the axon terminal.
Find out more about the common causes, symptoms, diagnosis and treatment options for pain on outside of foot in the ankle sprain section. 3) Cuboid Syndrome Cuboid Syndrome is a less common cause of lateral foot pain (i.e. outer side of foot pain) but it frequently goes undiagnosed which can lead to symptoms being present for long periods. It is caused by one of the small foot bones, the cuboid, being partially dislocated out of position following an injury like an ankle sprain or from repetitive strain on the foot.
Patellofemoral pain syndrome (PFPS), or runner's knee, got its nickname for an obvious and very unfortunate reasonâit's common among runners. The stress of running can cause irritation where the kneecap (patella) rests on the thighbone.ou may feel pain toward the back of the knee, a sense of cracking or that the knee's giving out. Steps, hills, and uneven terrain can aggravate PFPS. Causes of runner's knee. Pinpointing a single cause of runner's knee is difficult.