Change your default dictionary to American English. Comments & Questions. What are the common injuries and conditions associated with the ulna? The radius is a long bone, one of the four types of bone in the body. amplifire. During extension of the arm, the olecranon inserts into the olecranon fossa, a deep recess or curve in the humerus, to keep the elbow from extending beyond its 180° range. 1 Definition. ulnar definition: 1. relating to the ulna (= the long, thin bone in the lower part of the arm): 2. relating to the…. Ulnar fractures are quite common, with the points where it joins with the radius and the fibrocartilage articular disc at the wrist being most frequently injured. noun countable medical. The radius is one of the two bones that make up the forearm, the other being the ulna. Synonyms of the month. A Fracture of the Ulnar Bone is a break or crack, in the longer of the two forearm bones, called the ulna A high percentage of adults who sustain forearm fractures, do so in the radius, near the wrist or at the bone shaft, which is considered the middle of the forearm (between the wrist and elbow). The bone extending from the elbow to the wrist on the side opposite to the thumb in humans. Comments & Questions. QUESTION What causes tooth decay? Definition from Wiktionary, a free dictionary. Another notable prominence is the tuberosity of ulna. The ulna is a long bone found in the forearm that stretches from the elbow to the smallest finger, and when in anatomical position, is found on the medial side of the forearm. Definition: Pertaining to the ulna, the long medial bone of the forearm. All rights reserved. Ventral-lateral is a medical term refering to the front (ventral) and side (lateral ) of a body structure. At the proximal end of ulna, there are four important bony landmarks, the olecranon process, coronoid process, trochlear notch, and the radial notch [7]. This is referred to as the ulna length-to-height formula. Meaning of ulna as a finance term. Medical dictionary. The olecranon is the near end of the ulna, the bone in the forearm, and it forms the pointed portion of the elbow. From . A closed radius or ulna fracture happens when the radius or ulna bone breaks either partially or completely but is not exposed through the skin. Meaning and definition of ulna: The larger of the two bones of the forearm. very. Medical terminology Glossary of medical terms . Definition: What is the Ulna. Proper movement of the ulna, along with all the attached muscles is instrumental for doing anything with our hand, from extending or flexing the arm, picking something up, throwing or holding something to eating, driving, and typing [8]. Ulnar impaction syndrome, also called ulnocarpal abutment syndrome, is a common cause of ulnar-sided wrist pain. A long bone is a dense, strong bone characterized as being longer than it is wide. The alignment of the ulnar head and the ulnar notch allows the distal end of the ulna work as a pivot so the radius can rotate around it in all directions [8]. 8.3%. Read medical definition of Ulna. The small rounded part on the distal ulnar surface is the head, and it articulates with the cup-shaped ulnar notch of the radius and the triangular fibrocartilage articular disc, a cartilage structure that keeps the ulna from forming any direct articulations with the carpal bones [7, 11]. Die anatomischen Varianten der Ulna werden nach Hultén eingeteilt. Comments & Questions. Because of the strong force required to break the radius or ulna in the middle of the bone, it is more common for adults to break both bones during a forearm injury. 6.9%. of or relating to the ulna; located on the same side of the forearm as the ulna… See the full definition The radius articulates with the first row of carpel bones: mainly scaphoid laterally and the lunate medially to form the radio-carpel joint, triquetral only makes intermittent contact on ulnar … It forms the radio-carpel joint at the wrist and the radio-ulnar joint at the elbow. Olecranon: The bony tip of the elbow. This abutment results in increased load bearing across the ulnar head, TFCC and ulnar carpals, and subsequent degeneration of the TFCC, … Bent Fingers? call off. The borders and surfaces of the ulnar shaft are the primary site for muscular attachments to this bone, Supinator crest of ulna (a prominent ridge running from the back of the radial notch to proximal lateral surface of the ulna) [13], Olecranon process and the posterior border of the ulnar shaft [12], Anterior and medial surfaces of the shaft, Distal part of the posterior surface of the shaft, The ulna is longer but much narrower than the radius, . Wrist Movements. The borders and surfaces of the ulnar shaft are the primary site for muscular attachments to this bone [3]: Primary blood supply is provided by the ulnar artery, as well as its branch the common interosseous artery, which then further branches into the volar and posterior interosseous arteries, still supplying the ulna [6]. A forearm fracture can occur in one or both of the forearm bones. From Pedretti and Early, 2001. ulnar meaning: 1. relating to the ulna (= the long, thin bone in the lower part of the arm): 2. relating to the…. Definition of ulna in the Financial Dictionary - by Free online English dictionary and encyclopedia.   It would seem that the longer ulna would have more force applied during falls or other mechanisms of injury. Cf. Learner's definition of ULNA [count] medical: the bone in the lower part of your arm on the side that is opposite to your thumb — see picture at human. We will never share your email address. In the adult, these injuries usually require surgical fixation. The shaft is known as the diaphysis and the end of a long bone is called an epiphysis. Healthy Resources. There is one ulna bone in each arm. Ulna and Radius Fractures: What You Need to Know. )The ulna is on the same side of the arm as the little finger. nae (-nē) 1. This is the British English definition of ulna.View American English definition of ulna. The forearm is made up of two bones, the ulna and the radius. Ulnar styloid fractures often accompany a radius fracture. An example of ulna is a bone in your forearm. The most common medical condition of the radius is a fracture. Jan 19, 2019 - laterial view of ulna showing trochlear notch. Its distal end is much narrower compared to the proximal end, with two primary bony landmarks, the head of the ulna, and a styloid process [9]. By contrast, these injuries in the pediatric population result from simple falls and other lower energy mechanisms. The ulna is a long bone that helps stabilize the antebrachial region from the medial side of the forearm. The ulna is on the same side of the arm as the little finger. The ulna consists of a rhombic body (Latin: corpus ulnae) and a proximal and distal end piece (Latin: extremitas proximalis et distalis). Distally, the ulna articulates with the radius, forming the distal radio-ulnar joint. Proximal Radio-Ulnar Joint: Lateral to the trochlear notch, at the end of the coronoid process, there is a small smooth surface called the radial notch that articulates with the proximal end of the radius to form the proximal radio-ulnar joint, so the radius can rotate around the ulna to maintain the flexibility of the elbow [5, 8]. The secondary centers for the distal and proximal ends appear around 5-7 years and 8-10 years of age respectively. The bone extending from the elbow to the wrist on the side opposite to the thumb in humans. Featured Centers. It is a degenerative condition in which the ulnar head abuts the triangular fibrocartilage complex (TFCC) and ulnar-sided carpals. 10 Rheumatoid Arthritis Symptoms; What Is Exocrine Pancreatic Insufficiency? Called also ulnar drift and ulnar drift deformity. La fracture du radius et/ou de l'ulna (anciennement appelé cubitus) est une perte de la continuité osseuse d'un ou des deux os de l'avant-bras. 54.5%. 2. Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. The curved or crescent surface of the trochlear notch articulates with the trochlea of the humerus to form the hinge joint of the elbow. It articulates with the humerus and with the head of the radius at its proximal end; with the radius and bones of the carpus at the distal end. The radius and ulna also articulate distally in reverse to their articulation at the elbow to produce supination. The term is now more loosely used for any fracture of the distal radius, with or without involvement of the ulna, with dorsal (backward) displacement of the fracture fragments. The ulna is a longitudinal hollow bone that is located on the medial side of the forearm and is parallel to the radius. It is a long bone [1] and is vital in the formation of both the wrist and elbow joints [2]. flavourful. Die Ulna-Minusvariante beschreibt eine anatomische Variante der Ulna (Hultén-Variante), bei der eine verkürzte Ulna vorliegt.. 2 Variante. The ulna ossifies from three different centers, with the primary center for the shaft appearing around the eighth week of fetal life. Medically reviewed by the Healthline Medical Network — Written by the Healthline Editorial Team — Updated on January 19, 2018 The forearm contains two major bones. Medical Author: William C. Shiel Jr., MD, FACP, FACR; Ulna: The larger of the two long bones within the forearm. Learn more. Wrist. Seek medical care right away if you notice unusual tingling, weakness or pain in your hands or feet. It runs parallel to the radius, the other long bone in the forearm.The ulna is usually slightly longer than the radius, but the radius is thicker. Include any comments and questions you have about this word. Good and Bad Foods for Psoriasis; Video: Getting Personal on Life With MS ; Health … Where is the Ulna Bone Located in the Human Body It is the medial bone of the forearm, located on the side opposite to the thumb, that is on the side of the little finger, extending from the region of the wrist to the elbow. The ulna is longer but much narrower than the radius [3]. Medical Definition of Ulna. Definition of Ulnar. Medical definition of ulnar: of or relating to the ulna. Definition/Description. There is one ulna bone in each arm.