ulna


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Related to ulna: styloid process of ulna, Ulta

arm

arm, upper limb in humans. Three long bones form the framework of the arm: the humerus of the upper arm, and the radius (outer bone) and ulna (inner bone) of the forearm. The radius and ulna run parallel but meet at their ends in such a manner that the radius can rotate around the ulna. This arrangement permits turning the forearm to bring the hand palm up (supination) or palm down (pronation). The radius and ulna hinge with the bones of the hand at the wrist, and with the humerus at the elbow. The biceps brachii, a muscle of the upper arm, bends the arm at the elbow; the triceps brachii straightens the arm. Movement of the arm across the chest and above the head is accomplished by the pectoral muscles of the chest and deltoid muscles of the shoulder, respectively. In an adult the arm is normally five sixths as long as the leg.
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ulna

[′əl·nə]
(anatomy)
The larger of the two bones of the forearm or forelimb in vertebrates; articulates proximally with the humerus and radius and distally with the radius.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

ulna

1. the inner and longer of the two bones of the human forearm
2. the corresponding bone in other vertebrates
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
[4] They studied 258 subjects (140 males and 118 females) in Sri Lanka and concluded that significant correlation exists between height and ulna.
Glycine content in the mandible was lower than the ulna and the calvaria spectra which might represent the alveolar part of the mandible as it is much more vulnerable to disuse osteoporosis and this lower glycine content may provide the required destability to the collagen structure as higher glycine content is associated with greater stability because it can accommodate within the interior of the triple helix due to its small size.19 On the other hand higher proline content in the mandible and the calvaria than ulna might represent the basal part of the mandible as it is much less susceptible to the disuse osteoporosis.
Concomitant release of the ulna nerve is performed if there are symptoms of entrapment.
Material: SDNHM 50687, right proximal ulna; 50689, right proximal carpometacarpus; 50695, phalange.
The benefit is that each demonstrates the radial head without superimposition of the ulna.
There is no evidence that a rock overhang ever existed in the drainage during the last 30 000 years, and the natural position of repose, influenced by the ulna, causes either the medial surface or the antero-lateral edge to face upward.
Birds were placed on their backs and a limited ventral approach to the ulna was performed.
A virtually complete ulna, or forearm bone, and a partial upper-arm bone found at Hadar also came from A.
The humerus (upper arm) and ulna (forearm) bones join together at your elbow.
A10 Golding; 5 Adam; 4 Ulna; 3 Tutu; 2 Foot; 1 William 9 Francisco; San 8 Silicon; 7 Yugoslavia; 6 Coward; Noel 5 Spiral: Word
Team physiotherapist Cliffe Deacon told the Pakistan Cricket Board (PCB) media Twitter page: "The fracture's in the forearm, one of the two bones in the forearm called the ulna.