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.
It's possible that, for some of us, foot pain is caused purely by fibromyalgia or chronic fatigue syndrome. Our nerves are highly sensitive, and few areas take a beating like our feet. It stands to reason that they could hurt just because the nerves got riled up. However, foot pain can come from a lot of causes, and your fibromyalgia/chronic fatigue syndrome would amplify the pain. Some common overlapping conditions that could cause foot pain include: Myofascial pain syndrome,