Joint Venture Trivia Quiz

Answer: Shoulder joint

The bones which form the glenohumeral joint are the scapula and the humerus. The clavicle also plays a part in the formation of the shoulder joint. Movements at this joint can be adduction, abduction, flexion, extension, internal rotation and external rotation.

The main muscles of the shoulder joint are those that form the rotator cuff; namely the supraspinatus, infraspinatus, teres minor, and subscapularis. Glenohumeral ligaments are among the major supports of this joint. Dislocation of the shoulder is one of the most common orthopedic injuries encountered across all ages.

Answer: Ilium

It is called the sacroiliac joint (SIJ). The sacrum is at the lower end of the vertebral column while the ilium is the largest bone of the pelvis. Each human has two sacroiliac joints. Some of the main ligaments of this joint are the anterior and posterior sacroiliac ligaments, the interosseous sacroiliac ligament and the sacrospinous ligament.

There are not many movements that this joint can produce and its main function is shock absorption. Sacroiliac joint dysfunction is a common disorder characterized by pain.

Answer: Atlantoaxial joint

It is the joint between the two top vertebrae, the atlas and the axis. This joint itself consists of smaller joints, two lateral atlantoaxial joints and one median atlantoaxial joint. The anterior and posterior atlantoaxial ligaments are the main supports of this joint as is the transverse ligament of the atlas. Movements at this joint are flexion and extension. Dislocations and subluxation can occur at this important joint. Each human has only one atlantoaxial joint.

Answer: One

The thumb has only two phalangeal bones as compared to the other four fingers which have three. So the thumb has a single joint between the two. The other four fingers have one distal interphalangeal joint and one proximal interphalangeal joint. The muscle flexor pollicis longus causes flexion of the thumb and extensor pollicis longus causes extension of the thumb. An injury to the nerves that supply the muscles of the thumb can cause deformities and restricted movements. An example of a thumb deformity is ape thumb deformity which is caused by injury to the median nerve.

Answer: Sutures

The coronal suture is between the frontal and parietal bones and the lambdoidal suture is between the parietal and occipital bones. The sagittal suture is between the parietal bones. Other sutures are the sphenosquamosal suture, the zygomaticotemporal suture, the petrosquamous suture and the squamosal suture, to name a few.

Answer: Temporomandibular joint

It is a synovial joint. The joint also has a capsule. The temporomandibular ligament, the stylomandibular and sphenomandibular ligaments support this joint. The external carotid artery supplies blood vessels to this joint in the form of the superficial temporal branch.

The joint helps in eating, chewing, speaking and variety of other actions with its movements that include opening, closing and protrusion. Arthritis can affect this joint and cause inflammation. Dislocation of the jaw is a common injury that occurs.

Answer: Scapula

The acromion process is part of the scapula. It articulates with the lateral side of the clavicle to form this joint. It is the topmost joint of the shoulder. This joint has a capsule. The ligaments related to this joint are the acromioclavicular ligament, the coracoclavicular ligament which is the conoid and trapezoid ligaments together.

There is no specific movement for which this joint is responsible but it allows the raising of the hand above the head. Osteoarthritis can affect this joint.

Answer: Calcaneus

It is a synovial joint which is also sometimes called as the talocrural joint. The lower ends of the tibia and the fibula articulate in a way that a bracket shaped socket is formed called the mortise into which the talus fits. This forms the ankle joint.

There are two major ligaments that provide support to the ankle joint namely the medial and lateral ligament. The two main movements are dorsiflexion and plantar flexion. The gastrocnemius, soleus, posterior tibialis, tibialis anterior and plantaris all have some effect on the movements at the ankle joint.

Answer: Inferior radioulnar joint

The humeroulnar joint, humeroradial joint and the superior radioulnar joint, altogether form the elbow joint. It is the major joint between the shoulder and the wrist. Each human has two elbow joints. It is a synovial joint. The main movements at this joint are extension and flexion.

The triceps, the anconeus, the brachoradialis, the biceps and the brachialis are muscles that have an effect on the movements of this joint. Tennis elbow is a condition where a part of the elbow is inflamed.

Answer: False

The knee joint is formed by the upper part of the tibia, the lower part of the femur and the patella (knee cap). The articulations in the knee joint are formed between the tibia and the femur separately and the patella and the femur, separately. There are fibrocartilage structures in the knee joint called the menisci which serve the function of being shock absorbers.

There are a number of fluid filled sacs called bursae around the knee joint like the suprapatella, infrapatella and semimembranosus bursae.

There are quite the number of ligaments supporting the knee joint like the patellar ligament, medial and lateral collateral ligaments and the anterior and posterior cruciate ligaments. The movements at the knee joint include extension, flexion, medial and lateral rotation.