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The synovial membrane between the second and third cuneiforms behind, and the second and third metatarsal bones in front, is part of the great tarsal synovial membrane. Two prolongations are sent forward from it, one between the adjacent sides of the second and third, and another between those of the third and fourth metatarsal bones.
There are three cuneiform ("wedge-shaped") bones in the human foot: the first or medial cuneiform; the second or intermediate cuneiform, also known as the middle cuneiform; the third or lateral cuneiform; They are located between the navicular bone and the first, second and third metatarsal bones and are medial to the cuboid bone. [1]
The transverse arch is composed of the three cuneiforms, the cuboid, and the five metatarsal bases. The transverse arch is strengthened by the interosseous, plantar, and dorsal ligaments, by the short muscles of the first and fifth toes (especially the transverse head of the adductor hallucis ), and by the fibularis longus , whose tendon ...
The second and third metatarsals are fixed while walking, thus these metatarsals are common sites of injury. The fifth metatarsal may be fractured if the foot is oversupinated during locomotion. [9] Protection from injuries can be given by the use of safety footwear which can use built-in or removable metatarsal guards.
These are followed by a second row of four bones, referred to as the centralia (singular: centrale), and then a row of five distal tarsals, each articulating with a single metatarsal. In the great majority of tetrapods, including all of those alive today, this simple pattern is modified by the loss and fusion of some of the bones.
The intertarsal joint are the joints of the tarsal bones in the foot. There are six specific inter tarsal joints (articulations) in the human foot: Subtalar joint; Talocalcaneonavicular joint; Calcaneocuboid joint; Cuneonavicular joint; Cuboideonavicular joint; Intercuneiform joints
Skeletons of a human and an elephant. Comparative foot morphology involves comparing the form of distal limb structures of a variety of terrestrial vertebrates.Understanding the role that the foot plays for each type of organism must take account of the differences in body type, foot shape, arrangement of structures, loading conditions and other variables.
Indirect force involves twisting of the foot, usually an impact to the heel while the foot is pointed down toward the ground. [4] A mild form of this injury results in a widening of the gap between the first and second metatarsals. An extreme form of the a Lisfranc fracture causes a complete dislocation of the metatarsals from the tarsal bones.