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.
Sudden onset pain on the outer side of the foot can be from a fracture of the 5th Metatarsal and injuries to this bone are a common sports injury. Causes of pain on the outside of the foot are listed here: 1  Midtarsal Joint Sprain A mid tarsal joint sprain is an injury to the ligaments holding the mid tarsal joint together causing pain in the outside middle of the foot. 2  Peroneus Brevis Tendon Injury The Peroneus Brevis tendon inserts into the 5th matatarsal bone on the outside of the foot.
What is Plantar Fasciitis? Plantar fasciitis is a condition which causes heel and arch pain. Plantar fasciitis pain can be traced to inflammation on the bottom of the foot. Plantar fasciitis, which you may also have heard called Heel Spur Syndrome, is basically just an inflammation of the connective tissue in the foot. That connective tissue is the plantar fascia. It runs from the base of the toes, across the arch of the foot, and inserts into the heel bone.