MRI Essay Example | Topics and Well Written Essays - 1500 words

MRI - Essay ExampleA bulge from these condyles, which argon bony prominences, the distal check of humerus has cardinal depressions as well. The bony depression on the anterior position is known as coronoid fossa, while the piece of tail depression is known as olecranon fossa. The areas where the bones connect to each other are referred to as articular surfaces. The cubital formulate go is articulated at Radioulner, Radiohumeral and Ulnohumeral joints. These articular surfaces are covered by the hyalin cartilage. A joint capsule, which is lined by Synovial membrane, encloses the entire joint in such a way that all three joint cavities remain in communication with each other. The cubital joint joint is stabilized by ligaments. These include Radial and Ulnar Collateral ligaments and the ring-shaped ligament of the head of r. The medial side of the joint is strengthened by the Ulnar collateral ligament whereas the radial collateral ligament stabilizes the lateral side. The head of radius is connected to the radial notch of elbow bone by the annular ligament which runs around the head of radius. The movements at the elbow joint are facilitated by the muscles attached in this region. These muscles are organized into four different compartments fit in to their position, namely anterior, posterior, lateral and medial. The anterior group has dickens muscles, biceps brachii and brachialis. Posterior group has triceps brachii and anconeus muscles. The lateral group has brachioradialis and supinator muscles as well as the extensors of wrist and fingers. Whereas the flexor muscles of wrist and fingers, along with pronator teres muscle form the part of medial group. The arterial blood supply to the elbow region is through brachial artery. The venous drain is by the way of brachial vein, median vein and median cubital vein. The nerves supplying the elbow region include musculocutaneous nerve, radial nerve, ulnar nerve and axillary nerve. MRI IMAGE FOE human elbo w The daily activities performed by the hands, grasping and the coordinated movements at the forearm and wrist are possible because of the multiplex synovial joint at the elbow which is referred to as the elbow joint (Lee et al 2003). It connects the distal end of the upper arm bone humerus to the proximal ends of the two forearm bones radius and ulna. The bones are articulated at trochlea and capitulum of humerus above and trochlear notch of ulna and the head of the radius down the stairs (Snell 2004). The three bones are articulated at four joints, together known as cubital articulations, i.e, humeroulner, humeroradial, superior radioulner and inferior radioulner (Stroyan et al 1993). The articular surfaces are covered by hyaline cartilage and the joint is enclosed by the capsule, lined by synovial membrane. The capsule serves to stabilize the joint along with the two ligaments, i.e. lateral collateral ligament and the ulnar collateral ligament. Anteriorly, the capsule attaches to the radial and coronoid fossae and the medial and lateral epicondyles of humerus above and to the coronoid branch of ulna and annular ligament of radius head below. The posterior attachments of capsule are to the olecranon processes of humerus above and ulna below, and the annular ligament of radius head below (Snell 2004). The fan shaped lateral collateral ligament attaches lateral epicondyle of humerus to the annular ligament of radius. The triangular ulnar collateral