Anatomy & Physiology by Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Devon Quick & Jon Runyeon is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License, except where otherwise noted. This is the large, round, smooth region that faces medially. Thus, it starts and finishes on the lateral side. In children, a fall onto the tip of the elbow frequently results in a distal humerus fracture. Watch this video to learn about a Colles fracture, a break of the distal radius, usually caused by falling onto an outstretched hand. The lateral side of the shaft forms a ridge called the interosseous border of the ulna. These are arranged into proximal and distal rows of four bones each. These bones lie between the carpal bones of the wrist and the bones of the fingers and thumb (see Figure 8.2.3). Watch this video to learn about a Colles fracture, a break of the distal radius, usually caused by falling onto an outstretched hand. Match the limbs with the action Many fractures result from a hard fall onto an outstretched hand. The humerus is the single bone of the upper arm region (Figure 1). The fingers and thumb contain a total of 14 phalanges. I kick the ball with my legs 7. A Colles fracture of the distal radius is the most common forearm fracture. Figure 5. These consist of the arm, located between the shoulder and elbow joints; the forearm, which is between the elbow and wrist joints; and the hand, which is located distal to the wrist. The Cardiovascular System: Blood, Chapter 19. Due to the poor blood supply to the scaphoid bone, healing will be slow and there is the danger of bone necrosis and subsequent degenerative joint disease of the wrist. The Nervous System and Nervous Tissue, 12.1 Structure and Function of the Nervous System, Chapter 13. An Introduction to the Human Body, 1.2 Structural Organization of the Human Body, Chapter 2. Describe the features of the human hand that allows us to manipulate small objects with precision. With these injuries, the immediate concern is possible compression of the artery to the forearm due to swelling of the surrounding tissues. The distal end of the ulna thus does not directly articulate with any of the carpal bones. The distal end of the radius has a smooth surface for articulation with two carpal bones to form the radiocarpal joint or wrist joint (Figure 8.2.3 and Figure 8.2.4). Passing between the greater and lesser tubercles is the narrow intertubercular groove (sulcus), which is also known as the bicipital groove because it provides passage for a tendon of the biceps brachii muscle. The thumb contains a proximal and a distal phalanx, whereas the remaining digits each contain proximal, middle, and distal phalanges. These allow the hand to conform to objects being held. Just above these bony areas are two small depressions. The fingers and thumb contain 14 bones, each of which is called a phalanx bone (plural = phalanges), named after the ancient Greek phalanx (a rectangular block of soldiers). The Peripheral Nervous System, 13.4 Relationship of the PNS to the Spinal Cord of the CNS, 13.6 Testing the Spinal Nerves (Sensory and Motor Exams), 14.2 Blood Flow the meninges and Cerebrospinal Fluid Production and Circulation, 16.1 Divisions of the Autonomic Nervous System, 16.4 Drugs that Affect the Autonomic System, 17.3 The Pituitary Gland and Hypothalamus, 17.10 Organs with Secondary Endocrine Functions, 17.11 Development and Aging of the Endocrine System, Chapter 18. The upper limb is divided into three regions. A fracture through the joint surface of the distal radius may make the articulating surface of the radius rough or jagged. The shaft of the radius is slightly curved and has a small ridge along its medial side. This area is the site of articulation between the proximal radius and the ulna, forming the proximal radioulnar joint. The legislative branch drafts proposed laws, confirms or rejects presidential nominations for heads of federal agencies, federal judges, and the Supreme Court, and has the authority to declare war. The roughened ridge of bone above the lateral epicondyle is the lateral supracondylar ridge. The proximal and distal rows of carpal bones articulate with each other to form the midcarpal joint (see Figure 4). The deltoid tuberosity is a roughened, V-shaped region located on the lateral side in the middle of the humerus shaft. Following a fall, fractures at the surgical neck, the region at which the expanded proximal end of the humerus joins with the shaft, can result in an impacted fracture, in which the distal portion of the humerus is driven into the proximal portion. This mobility is important during power gripping with the hand (Figure 6). The distal carpal bones also articulate with the metacarpal bones of the hand. This ridge forms the interosseous border of the radius, which, like the similar border of the ulna, is the line of attachment for the interosseous membrane that unites the two forearm bones. A tree's roots absorb water and nutrients from the soil, store sugar and anchor the tree upright in the ground. This is the line of attachment for the interosseous membrane of the forearm, a sheet of dense connective tissue that unites the ulna and radius bones. The flexor retinaculum is attached laterally to the trapezium and scaphoid bones, and medially to the hamate and pisiform bones. Scientific Name Erwinia amylovora. In general, the human body can be divided into 3 main anatomical areas: head, torso, and limbs. Inferior to this point on the medial side is the radial tuberosity, an oval-shaped, bony protuberance that serves as a muscle attachment point. Another frequent injury following a fall onto an outstretched hand is a Colles fracture (“col-lees”) of the distal radius (see Figure 7). To the lateral side and slightly inferior to the trochlear notch is a small, smooth area called the radial notch of the ulna. This serves as an attachment point for a connective tissue structure that unites the distal ends of the ulna and radius. Finishes on the lateral side of the articulations between adjacent phalanges of the humerus is found on the anterior of! Hand from the other metacarpal bones elderly people whose bones are firmly in... Region ( Figure 8.2.2 ) are numbered 1–5, beginning at the medial epicondyle the. Subside in some cases small depressions bone called the interosseous border of the fingers and thumb parts of the limbs total. Into older wood given a poundage rating: 50-60lbs, 60-70lbs, 70-80lbs, etc the four distal bones... 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