7,200 Nerve Endings
Nerves are excitable tissue, covered and protected by connective tissue. Blood vessels within these coverings feed the nerves. Spinal nerves are mixed nerves containing both sensory and motor impulses. As the nerves move out from their attachment to the spinal cord, they branch out into areas of service. These branches are called rami. An example is the ramus that attends to the muscles and structures of the limbs; this branch is called the ventral ramus.
Dermatomes are identified as an area of skin that gives sensory information to the roots of cranial or spinal nerves. All nerves have dermatome identification. At the same time, skeletal muscles receive motor stimulation from neurons within spinal nerves. A section of a spinal nerve that provides motor information to muscles is considered a myotome. These regions affect the nerve endings found in the feet as well.
While all this may be a little confusing, it helps to have at least a general overview of the nerve structures. All you need to be concerned with is the fact that the feet contain many nerves, providing signals throughout the body, as well as receiving signals from outside stimulus.
The ventral rami form a network of nerves called a plexus. From the plexus, other nerves move out into the body, toward a specific region. Once in the service region, these nerves branch out yet again to innervate specific structures. The sacral plexus is the main provider for the legs and feet.