$$F_{stability} = k \times D_{depth}$$

Question 1

Which structural feature of the temporomandibular joint (TMJ) contributes most to its tendency to dislocate easily?

Accepted Answer

The shallow mandibular fossa

Question 2

A patient presents with anterior dislocation of the TMJ. Which movement is most likely impaired?

Accepted Answer

Gliding (lateral excursion) of the mandible

Question 3

Which ligament is primarily responsible for supporting the weight of the upper limb at the shoulder joint?

Accepted Answer

Coracohumeral ligament

Question 4

The shoulder joint sacrifices stability for mobility. Which anatomical feature best explains this trade-off?

Accepted Answer

The thin and loose articular capsule

Question 5

Which muscle tendon acts as the 'superstabilizer' of the shoulder joint?

Accepted Answer

Tendon of long head of biceps brachii

Question 6

A football player suffers a shoulder dislocation after tackling an opponent. Which direction is the humerus most likely to dislocate?

Accepted Answer

Anteriorly and inferiorly

Question 7

Which of the following ligaments is NOT important in stabilizing the hip joint?

Accepted Answer

Ligamentum teres

Question 8

The acetabular labrum of the hip joint is composed of which type of tissue?

Accepted Answer

Fibrocartilage

Question 9

Which movement is allowed by the elbow joint due to its hinge structure?

Accepted Answer

Flexion and extension

Question 10

Which ligament prevents hyperextension of the knee joint?

Accepted Answer

Anterior cruciate ligament (ACL)

Question 11

A patient with a torn ACL will have difficulty preventing which abnormal movement?

Accepted Answer

Forward sliding of tibia

Question 12

Which joint is described as a 'modified hinge' and allows both depression/elevation and gliding movements?

Accepted Answer

Temporomandibular joint (TMJ)

Question 13

Which of the following best describes the articulating surfaces of the hip joint?

Accepted Answer

Head of femur and acetabulum

Question 14

Which ligament contains an artery that supplies the head of the femur?

Accepted Answer

Ligamentum teres

Question 15

Which structure is responsible for preventing rotation of the knee when it is extended?

Accepted Answer

Fibular and tibial collateral ligaments

Question 16

During knee flexion, which joint allows gliding motion of the patella?

Accepted Answer

Femoropatellar joint

Question 17

Which of the following is a real-world consequence of poor occlusion of teeth affecting the TMJ?

Accepted Answer

Ear and face pain, joint stiffness, and popping sounds

Question 18

Which equation best represents the relationship between force and joint stability, considering the anatomical features of synovial joints?

Accepted Answer

$$F_{stability} = k 	imes D_{depth}$$

Question 19

Which of the following best explains why the hip joint is less likely to dislocate compared to the shoulder joint?

Accepted Answer

The hip joint has a deep acetabulum and strong ligaments

Question 20

A patient is unable to perform lateral excursion of the mandible. Which joint is most likely affected?

Accepted Answer

Temporomandibular joint (TMJ)

Study Guide: Diversity and Anatomy of Major Synovial Joints

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