Development of Upper and Lower Limbs Bones Create Structure, Muscles and Nerves Create Movement

Embryologically, the skeletal structure of each upper and lower limb begins as a unit. As the unit develops, joint spaces appear distinguishing the separate bones. As the unit grows, more spaces appear at the successive joints until the bones and joints of the whole limb are created, scapula to fingers and pelvic bone to toes. When the skeletal structure is basically formed, the muscles, along with the nerves, migrate from the center of the body into the limbs to create movement. When there is a problem in an upper or lower limb, going back to their embryological origins, including exploring how the joint spaces informed the development of the bones, can be helpful to recalibrate the length and cellular organization of the limb. So often we use our muscles to try to create our form. We hear or give directions like, pull down your scapula and tuck your pelvis. We are taught to use our muscles in a compensatory pattern for alignment and joint issues rather than go