The important ligaments of the elbow are the medial collateral ligament (on the inside of the elbow) and the lateral collateral ligament (on the outside of the elbow.) Together these ligaments provide the main source of stability for the elbow, holding the humerus and the ulna tightly together.
What ligament makes up the elbow joint quizlet?
triangular ligament located on the medial side of the elbow. It extends from the medial epicondyle of the humerus to ulnar tuberosity on the medial aspect of the coronoid process and the medial aspect of the trochlear notch/olecranon of the ulna. It consists of three bands.
What ligaments stabilize the elbow?
- Medial collateral ligament.
- Lateral collateral ligament.
- Annular ligament.
What makes up the elbow joint?
The elbow joint is composed of the distal end of the humerus and the proximal ends of the radius and the ulna (see the images below).What is the annular ligament?
The annular ligament is a complex structure formed from the capsule, lateral collateral ligamentous complex, and supinator muscle that act in unison to stabilize the proximal radioulnar joint. Its posterior attachment to the ulna can be fenestrated normally.
Where are the anterior and posterior cruciate ligaments found?
Two of the four ligaments that connect the thighbone (femur) to the shinbone (tibia) are the posterior cruciate ligament and the anterior cruciate ligament (ACL). The two cruciate ligaments cross one another in the middle of the knee as they join these leg bones together.
What is the ulnar collateral ligament?
The ulnar collateral ligament (UCL) is a ligament that runs on the inner side of the elbow to help support it when performing certain motions, such as throwing. When this ligament is torn or damaged, it can lead to pain, elbow instability and loss of function.
What is an olecranon fossa?
The olecranon fossa is located on the posterior surface of the distal humerus, where it receives the proximal ulna during full extension of the arm. … The intertubercular groove passes between two tubercles on the humerus.Where does the ulnar collateral ligament attach?
The ulnar collateral ligament complex is located on the inside of the elbow (pinky or medial side). It is attached on one side to the humerus (the bone of the upper arm) and on the other side to the ulna (a bone in the forearm).
Where do you find ligaments?Ligaments are bands of tough elastic tissue around your joints. They connect bone to bone, give your joints support, and limit their movement. You have ligaments around your knees, ankles, elbows, shoulders, and other joints.
Article first time published onWhat is a ligament?
A ligament is a fibrous connective tissue that attaches bone to bone, and usually serves to hold structures together and keep them stable.
What is flexion of the elbow?
When your forearm moves toward your body by bending at your elbow, it’s called elbow flexion. The opposite movement is called elbow extension. The three bones involved in elbow flexion are the: humerus, in your upper arm. ulna, on the little finger side of your forearm.
Does the elbow have intracapsular ligaments?
Like all synovial joints, the elbow joint has a capsule enclosing the joint. This in itself is strong and fibrous, strengthening the joint. The joint capsule is thickened medially and laterally to form collateral ligaments, which stabilise the flexing and extending motion of the arm.
What is the Coracoacromial ligament?
The coracoacromial ligament (CAL) connects the acromion and coracoid process of the scapula, forming an osseoligamentous static restraint to superior humeral head displacement.
What is interosseous ligament?
Abstract. Purpose: The interosseous ligament (IOL) is known to be an important longitudinal stabilizer of the forearm. We hypothesize that it may also contribute to transverse stability, with pronosupination tensioning of the radius relative to the ulna.
What is Pubofemoral ligament?
The pubofemoral ligament is anteroinferior to the hip joint. It is triangular, its base attaching to the iliopubic eminence, superior pubic ramus, obturator crest and obturator membrane. It blends distally with the capsule and deep surface of the medial iliofemoral ligament.
What is Tommy Johns syndrome?
A Tommy John injury is an injury to the ligament on the medial (inside) part of the elbow. It most commonly occurs in overhead throwing athletes such as baseball pitchers and quarterbacks but can also occur in other sports such as gymnastics, javelin throwing, tennis, volleyball, and softball.
What is the lateral collateral ligament?
The lateral collateral ligament is a thin band of tissue running along the outside of the knee. It connects the thighbone (femur) to the fibula, which is the small bone of the lower leg that runs down the side of the knee and connects to the ankle.
What is a radial collateral ligament?
The radial collateral ligament (RCL) is a strong, short, thin band of tissue that connects from the humerus (upper arm bone) to the radius (one of two forearm bones). The role of the RCL is to provide stability against inner to outer stress on the elbow. … This acute injury can also coincide with elbow joint dislocation.
What are the three types of ligaments?
Types of articulation ligaments There are three types of the articulation ligaments: capsular, extracapsular and intracapsular. They differ by their location within a joint.
Where is the posterior ligament?
The posterior cruciate ligament (PCL) is located inside the knee, just behind the anterior cruciate ligament (ACL). It is one of several ligaments that connect the femur (thighbone) to the tibia (shinbone). The posterior cruciate ligament keeps the tibia from moving backward with relation to the thigh bone.
What is the PCL ligament made of?
The PCL is comprised of two bundles: the larger anterolateral bundle (ALB) and smaller posteromedial bundle (PMB). According to Anderson et al., the distance between the center of the ALB and PMB femoral attachments is 12.1 mm, while the distance between their tibial attachments is 8.9 mm [4].
Where is the medial collateral ligament of the elbow?
The medial collateral ligament (MCL) of the elbow of is part of the complex of ligaments and tendons that attach and stabilize the bones of the lower and upper arm where they meet at the elbow joint. (It should not be confused with the MCL of the knee.)
Are there 2 ulnar collateral ligaments?
Structure. It consists of two portions, an anterior and posterior united by a thinner intermediate portion. Note that this ligament is also referred to as the medial collateral ligament and should not be confused with the lateral ulnar collateral ligament (LUCL).
Where is the radial collateral ligament located?
The radial collateral ligament (RCL), lateral collateral ligament (LCL), or external lateral ligament is a ligament in the elbow on the side of the radius.
What is the capitulum?
In human anatomy of the arm, the capitulum of the humerus is a smooth, rounded eminence on the lateral portion of the distal articular surface of the humerus. It articulates with the cupshaped depression on the head of the radius, and is limited to the front and lower part of the bone.
What is the function of Fossae?
Function. The olecranon fossa provides space for the olecranon of the ulna during extension of the forearm, from which it gets its name.
Is olecranon fossa the elbow?
The two depressions—the olecranon fossa, behind and above the trochlea, and the coronoid fossa, in front and above—receive projections of the ulna as the elbow is alternately straightened and flexed.
What are ligaments made up of?
Ligaments are made out of connective tissue that has a lot of strong collagen fibers in it. They are found in different shapes and sizes in the body. Some look like pieces of string, others look like narrow or wide bands.
How are ligaments formed?
The arrays of the collagen fibrils form collagen fibers. Tenocytes reside in the gaps of the fibers, connecting to one another through cellular channels. The collagen fibers are packed into fascicles that are bundled by endotenon. The fascicles are wrapped by epitenon to form the complete tendon/ligament tissue.
What are ligaments made out of?
Ligaments are like cords made of connective tissue, elastic fibers that are somewhat stretchy, and collagen, a protein that binds tissues in animals.
