Foot Bones explained | Foot joints and ankle movements | Human Anatomy in 3D | elearnin
This video illustrates one of the most used parts of human body, the foot. Understand the intricacies of the movements of the feet by getting familiar with the joints and bones which make the feet, and the set of complex muscles which make it so easy for humans to move their body.
The foot, the plural of which is feet, is a structure found in many vertebrates, typically associated with the hind limbs that is responsible for the movement of the mammals. Foot is the last portion of a leg in most mammals, as it bears weight.
The human foot and ankle combination is the strongest complex structure with 26 bones, 33 joints and number of ligaments and tendons. The foot lies below the ankle joint. The foot is a five toed organ which supports the body in the standing and moving forward and backwards. The skeleton of the foot begins with the ankle bone, where the two bones of the lower leg join together and help form a stable structure that holds the foot in a firm position.
The bones that are in the back part of the foot are called the heel bones. Calcaneus, also known as heel bone, is the large bone that forms the foundation of the rear part of the foot. This heel bone connects the ankle bone, also known as the talus, with the cuboid bones. The connection between the talus and calcaneus forms the sub talar joint. This sub talar joint is very crucial for the normal foot function and allows the foot to move sideways.
The tarsal bones are set of five bones that work together as a group. These bones fit uniquely with each other, especially, the way they lock and unlock themselves when the foot moves from one direction to the other.
The ankle joint acts as the pivotal joint for the movement of the foot and helps the foot to bend up and down. There are ligaments in the foot which are soft tissues that attach one bone to another and are very similar to tendons. The only difference between them is that the tendons attach muscles to bones. The Achilles tendon is the most important tendon in the foot which is essential for walking, running and jumping. This tendon helps us rise up on toes. Most of the muscles of the foot are arranged in the layers on the sole of the foot. There are also tendons that provide padding underneath the sole.
The main nerve to the foot is the tibial nerve. It supplies sensation to the toes and sole of the foot and controls their muscles. The main blood supply to the foot runs right beside the posterior larger nerve. Several less important arteries enter the foot from the other directions.