![]() ![]() In hindlimbs the combined first and second tarsal bone articulates with the second metatarsal bone, and the fourth tarsal bone articulates with the fourth metatarsal bone. This has biomechanical implications, with forces mediated through both the second and third carpal bones being transmitted through the second metacarpal bone and the syndesmosis with the third metacarpal bone. In forelimbs the second carpal bone and a variable portion of the third carpal bone usually articulate with the second metacarpal bone, 1 whereas the fourth carpal bone articulates with the fourth metacarpal bone. These variable patterns of ossification of the interosseous ligaments were age-related and may reflect a continuum, the result of repetitive trauma, but are not necessarily of clinical significance. 1 Five patterns of ossification were recognized, alone or in combination: (1) a small (1 cm diameter) (4) focal axial ossification of the interosseous ligament on the palmar surface and (5) diffuse axial ossification on the palmar surface so that the bone margins were obscured. In a necropsy study of 100 horses of mixed breed, age, and work discipline, the majority had some degree of ossification between the second or fourth metacarpal bone and the third metacarpal bone, which was often bilaterally symmetric and more extensive medially. There is variable ossification of these syndesmoses. The osseous structures comprise the second, third, and fourth metacarpal (metatarsal) bones with interosseous ligaments joining the second and third, and fourth and third metacarpal (metatarsal) bones. ISBN 978-8-7.The metacarpal and metatarsal regions are discussed together except where major anatomic differences occur. Bevægeapparatets anatomi (in Danish) (12th ed.). ^ Bojsen-Møller, Finn Simonsen, Erik B.^ a b c Bojsen-Møller, Finn Simonsen, Erik B."Sesamoids and accessory ossicles of the foot: anatomical variability and related pathology". "Traction apophysitis of the fifth metatarsal base in a child: Iselin's disease". Archived from the original on 16 October 2017. Emergency Care Institute, New South Wales. : CS1 maint: multiple names: authors list ( link) "Diagnosis and Management of Common Foot Fractures". Journal of the American Academy of Orthopaedic Surgeons. "Treatment Strategies for Acute Fractures and Nonunions of the Proximal Fifth Metatarsal". ^ a b Bojsen-Møller, Finn Simonsen, Erik B.The horizontal head of the adductor hallucis from the deep transverse metatarsal ligament, a narrow band which runs across and connects together the heads of all the metatarsal bones. The function of the muscle is to move the fourth toe medially and move the toes together. The third Plantar interosseus muscle originates from the medial side of the base and shaft of the fifth metatarsal. The function of the muscle is to spread the toes. The fourth dorsal interosseus muscle originates from the medial side of shaft. The plantar surface of the base is grooved for the tendon of the abductor digiti quinti, and gives origin to the flexor digiti minimi brevis. ![]() The tendon of the fibularis tertius inserts on the medial part of the dorsal surface and the fibularis brevis on the dorsal surface of the tuberosity. The head articulates with the fifth proximal phalanx, the first bone in the fifth toe.Ī strong band of the plantar aponeurosis connects the projecting part of the tuberosity with the lateral process of the tuberosity of the calcaneus. The plantar surface of the base is grooved for the tendon of the abductor digiti quinti. The fifth metatarsal has a rough eminence on the lateral side of its base, known as the tuberosity or the styloid process. The base articulates behind, by a triangular surface cut obliquely in a transverse direction, with the cuboid and medially, with the fourth metatarsal. The bone is curved longitudinally, so as to be concave below, slightly convex above. These surfaces are rough for the attachment of ligaments. The bone is somewhat flat giving it two surfaces the plantar (towards the sole of the foot) and the dorsal side (the area facing upwards while standing). The narrowed part in the middle is referred to as the body (or shaft) of the bone. The base is the part closest to the ankle and the head is closest to the toes. Īs with the four other metatarsal bones it can be divided into three parts a base, body and head. The fifth metatarsal is analogous to the fifth metacarpal bone in the hand. It is the second smallest of the five metatarsal bones. The fifth metatarsal bone is a long bone in the foot, and is palpable along the distal outer edges of the feet. ![]()
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