head of the ulna. A humerus fracture is an injury to the bone of the upper arm that connects the shoulder to the elbow. It forms the upper part of the elbow and is the spool around which the forearm bends and straightens. Evidence is sparse as to which approach is optimal for specific circumstances. The rounded capitulum, also called the capitellum, is on the lateral aspect and articulates with the radius. Lateral Epicondyle. ... who fall on the outstretched hand are usually fitter and have better reflexes when compared to those with elbow or humerus fractures. The articular part is a modified condyle, which consists of a medial trochlea and a lateral capitulum, separated by a faint groove. Figure 3. The severity of these changes is dependent on the degree of ulnar growth retardation and growth potential remaining at the time of the insult. humerus: The bone of … The ulna shaft tapers distally, lying oblique to the radius, i.e. Structure. The majority of patients suffering a PHF or DRF are aged 60 years or older, and the most representative patient is an elderly osteoporotic woman [2, 3]. Distal is the end of the bone closest to the elbow. The corresponding bone in the lower leg is the fibula. Feeling the joint space between the head of the radius and the humerus is possible. Other conditions Humerus Varus can be caused due to haematologic, infectious, genetic and neurological disorders. Illustration from from Gray's Anatomy . It articulates with the ulna of the lower arm . It is a fracture of the distal humerus just above the Elbow joint. In these cases, the injury is called a distal radius and ulna fracture. the round smooth structure on the distal end of the humerus. In brief, femur and humerus are two of the … Full Posterior View of Right Radius. (Left) The bones of the elbow. The radial head is the knobby end of the radius where it meets the elbow. The elbow is a trochoginglymoid joint; it has the capacity to flex and extend within the sagittal plane and also to rotate around a single axis. The difficulty in treating complex distal humerus fractures lies in the unique and specific anatomy of the distal humerus, which allows it to articulate freely with the radius and ulna. In contrast to the more mobile radius, rotary motion is very restricted at the ulnar part of the elbow joint, sharply limiting the ulna in its ability to rotate around its long axis. Rays are deleted, and there is a large soft tissue gap between the bony mass and the two metacarpals. The distal humerus is marked by three depressions or fossae. It can also occur along with a fracture of the distal ulna (the forearm bone on the small finger side). The capitulum is a bone marking located on the lateral side of the distal humerus. Like many of the long bones in the body, the humerus has a proximal end, shaft, and distal end. Key Terms. This is the nerve that causes pain and feeling of pins and needles when you hit your "funny bone." The humerus is the only bone in the upper arm. The distal styloid process is blunt and articulates with the ulnar carpal bone, accessory carpal bone and ulnar notch of the radius. Intervention: Surgical repair of a distal humerus fracture with or without ulnar nerve transposition. It articulates with the radius bone of the lower arm. Coronoid fossa. The distal humerus has cartilage at the end of it, which is part of the upper part of the elbow joint. There is a distinct gap between it and the radius, which is filled by the pronator quadratus muscle. The radius is the shorter of the two long bones of the forearm, the other being the ulna. Volkmann's Contracture. It extends from the elbow to the wrist, and is the bone on the thumb side of the arm. the smooth, spool-shaped structure right next to the capitulum. Furthermore, the length and the average diameter of the femur are higher than that of the humerus.Besides, the femur is the largest bone of the human body while humerus is the second largest bone.. The humerus articulates with the scapula at the shoulder and with the radius and ulna at the elbow. At the wrist, the radius forms a joint with the ulna bone. A distal radius fracture can be isolated, which means no other fractures are involved. The ulna (ul) was slightly wider than the radius (ra), and the normal tripartite elbow joint comprised direct articulation among the proximal portion of ulna containing a well-formed olecranon (ole) attached to the triceps brachii muscle tendon (Fig. Proximal refers to the area closest to the center of the body -- the shoulder. Proximal and Distal: ... No, the radius is not proximal to the humerus. The distal end or extremity of the humerus has both articular and non-articular parts. Anonymous. Depending on the angle of the distal radius as it breaks, the fracture is called a Colles or Smith fracture. lol.... False, the radius is distal to the humerus. EDIT: I wasn't sure if you were joking or not, if not, I certainly didn't mean any offence. FIGURE 5-15 Lateral view of the wrist/hand. This is cute! This projection is the coronoid process. The trochlear (or semilunar) notch of the ulna articulates with the trochlear articular surface of the distal humerus. Ulnar notch. The trochlea is spool-shaped medial portion of the distal humerus and articulates with the ulna. Located near the wrist at the distal end of the ulna; when hand pronated can be seen on the "little finger" side of the distal forearm . Humerus fractures are generally divided into three types of injuries based on the location of the fracture. The lateral flange on the ulna for articulation with the radius was separated from this surface by a low ridge. Full Anterior View of Right Radius. Distal end of humerus. Fractures of the proximal humerus (PHF) or distal radius (DRF) are among the most common fractures in the elderly population [1, 2]. Surgical approaches to the proximal radius and ulna were recently well described in this journal. The radius is further away from midline, thus making it a distal structure with respect to the humerus. At the elbow, it joins with the capitulum of the humerus, and in a separate region, with the ulna at the radial notch. Action: Moves the ulna during pronation and extends the forearm at the elbow. A fracture in this area can be very painful and make moving Note the flipper-like outline of the soft tissues. 1 This article is a continuation of a 2006 publication on surgical approaches to the humerus. 3D model. The trochlea is on the medial aspect of the distal humerus and articulates with the ulna.   The top of the arm bone is called the proximal humerus, and the bottom of the bone is called the distal humerus. This article discusses the recovery process for both approaches, plus the pain management tactics that can be used for all patients. Phocomelia. The humerus is closer to the root of the upper limb, and thus, the radius is DISTAL to the humerus.... 0 0. Attachments: Originates from the humerus and attaches to the ulna. Ulna and radius. It results in damage to the brachial artery and anterior interosseous nerve, the resulting ischemia causes Volkmann's ischaemic contracture. Full Medial View of Right Radius. Tendonitis is common in tennis players. Distal radius fractures can be reset either with surgery (open reduction) or without it (closed reduction). It is also important for rotation of the forearm; that is, the ability to turn your hand palm up (like accepting change from a cashier) or palm down (like typing or playing the piano). The humerus (upper arm bone) The radius (forearm bone on the thumb side) The ulna (forearm bone on the pinky side) The elbow joint bends and straightens like a hinge. Trochlea. It glides up and down the front of the distal humerus when you bend your arm and rotates around the ulna when you turn your wrist up or down. (Right) The major nerves and ligaments of the elbow are highlighted. There is a large nerve on the inner side of the distal humerus and elbow, called the ulnar nerve. The lateral epicondyle is the non-articular lateral bulge of bone located superior and lateral to the capitulum. The main difference between femur and humerus is that femur is the long bone of the upper leg whereas humerus is the long bone of the upper arm. (Left) The elbow bones. The other bones that make up the lower part of the elbow joint are the ulna and the radius. The head of the radius articulates with the capitulum. The distal end of the humerus has two articulation areas, which join the ulna and radius bones of the forearm to form the elbow joint. The medial and lateral epicondyles are projections located proximally to the trochlea and capitulum, respectively. A person suffering from a humerus fracture will have to have his or her arms set in a special cast to prevent injury to the nerves. This small curved surface, the radial notch, is where the head of the radius articulates. 1 decade ago. Managing Pain During Recovery. the proximal end lies medial and the distal end lateral to the radius. Main outcomes: Ulnar nerve function was graded immediately postoperatively and at final follow-up according to a modified system of McGowan. This is the head of the radius, This is the neck. Signs of a fracture in the area include humerus pain, swelling and bruising. The distal humerus is the lower end of the humerus. 2 Unlike the humerus, relatively little clinical research has been published regarding exposures to the ulna and radius. 1C, asterisk), the proximal portion of radius and the distal portion of humerus (hu) . (a) The splayed distal humerus in this 2-year-old may represent a conglomeration of remnants of the proximal radius and ulna. The more medial of these areas is the trochlea , a spindle- or pulley-shaped region (trochlea = “pulley”), which articulates with the ulna bone. Humerus fractures can occur as a result of falls, osteoporosis and other injuries. Figure 2. The bones of the forearm (radius and ulna), upper arm (humerus), hand, and wrist. The humerus is typically described as having a proximal region, shaft, and distal region. Brachioradialis: The brachioradialis is located in the superficial region of the forearm posterior compartment, Attachments: Originates from the humerus and attaches to the distal end of the radius. To bring out the radial head, place two fingers on either side (proximal and distal) of it and ask the client to alternately pronate and supinate the forearm at the radioulnar joints; the spinning of the head of the radius can be felt under your fingers. These changes occur as the radius continues to grow “around” the distal ulna, which is located caudolateral to the distal radius. A distal radius fracture, also known as wrist fracture, is a break of the part of the radius bone which is close to the wrist. Small depression on the MEDIAL aspect of the distal radius; the head of the ulna fits into the ulnar notch to form the distal radio-ulnar joint. The parahumeral fat appears abnormal. A distal humerus fracture is a break in the lower end of the upper arm bone (humerus), one of the three bones that come together to form the elbow joint. Both the anatomical and surgical neck of the humerus are highly susceptible to fracture. This part of the humerus articulates with both ulna and radius. Distal to it this rough area, the ulnar tuberosity, marks the insertion of the brachialis tendon. trochlea. This is a rounded eminence forming the lateral part of the distal humerus. The "distal humerus" is the lower end of the humerus (upper arm bone).
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