A 29-year-old patient has a dislocated elbow in which the ulna and medial part of the distal humerus have become separated. What classification of joint is normally formed between these two bones?: (A) Trochoid, (B) Ginglymus, (C) Enarthrodial, (D) Synarthrosis
Answer is B. Ginglymus joint is the technical term to describe a hinge joint. It allows motion in one axis (flexion and extension in the case of the elbow) and is therefore a uniaxial joint. The other types of joints listed allow motion in more than one axis.