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The Ulna o the ulna is a medial long bone, the longer of the two in the forearm. Proximally, it articulates with the capitulum and trochlea of the humerus; At the radial notch, it articulates with the head of radius o It stabilizes the forearm o The HEAD LIES DISTALLY. The --Humerus and ulna: landmarks and articulations
24 lip 2023 · The ulna is one of the two forearm long bones that, in conjunction with the radius, make up the antebrachium. The bone spans from the elbow to the wrist on the medial side of the forearm when in anatomical position. In comparison to the radius, the ulna is described to be larger and longer.
1 paź 2024 · The ulna is a long bone in the forearm. It lies medially and parallel to the radius, the second of the forearm bones. The ulna acts as the stabilising bone, with the radius pivoting to produce movement. Proximally, the ulna articulates with the humerus at the elbow joint.
We examined 74 elbow joints to elucidate the anatomy of the proximal ulna, especially the course of the posterior border, the point of varus angulation, the width of the shaft, and the relationship of the posterior border to the anterior and interosseous ones. MATERIALS AND METHODS.
L’ulna. C’est l’os médial de l’avant-bras, en forme de S allongé. Il s’articule en haut avec la. circonférence articulaire radiale et la trochlée humérale, et en bas avec l’épiphyse distale du. radius (mais pas directement avec les os du carpe).
The ulnar shaft is triangular in shape, with three borders and three surfaces. As it moves distally, it decreases in width. The three surfaces: Anterior – site of attachment for the pronator quadratus muscle distally. Posterior – site of attachment for many muscles. Medial – unremarkable.
25 sie 2018 · Ulna (plural: ulnae; pronunciation: úl-nu) is one of the two primary bones forming the forearms in humans, the other one being the radius. There is one ulna bone in each arm. It is a long bone [1] and is vital in forming both the wrist and elbow joints [2].
