Musculoskeletal: Upper Extremity: Ulnohumeral and Radiohumeral Joints: Osteokinematics and Arthrokinematics

Question 1

Elbow: Ulnohumeral
Osteokinematic: Flexion

Answer 1

• The Arthrokinematics of Ulnohumeral Flexion in an OPEN KINETIC CHAIN.
• With Ulnohumeral flexion the CONCAVE surface of the ulna will roll and glide ANTERIORLY on the convex surface of the humerus due to the ANTERIOR movement of the shaft of the ulna.
• The Arthrokinematics of Ulnohumeral Flexion in a CLOSED KINETIC CHAIN.
• With Ulnohumeral flexion the CONVEX surface of the humerus will glide POSTERIORLY as the head and shaft of the humerus roll ANTERIORLY on the concave surface of the ulna.

Question 2

Elbow: Ulnohumeral
Osteokinematic: Extension

Answer 2

• The Arthrokinematics of Ulnohumeral Extension in an OPEN KINETIC CHAIN.
• With Ulnohumeral extension the CONCAVE surface of the ulna will roll and glide POSTERIORLY on the convex surface of the humerus due to the POSTERIOR movement of the shaft of the ulna.
• The Arthrokinematics of Ulnohumeral Extension in a CLOSED KINETIC CHAIN.
• With Ulnohumeral extension the CONVEX surface of the humerus will glide ANTERIORLY as the head and shaft of the humerus roll POSTERIORLY on the concave surface of the ulna.

Question 3

Elbow: Radiohumeral
Osteokinematic: Flexion

Answer 3

• The Arthrokinematics of Radiohumeral Flexion in an OPEN KINETIC CHAIN.
• With Radiohumeral flexion the CONCAVE surface of the radius will roll and glide ANTERIORLY on the convex surface of the humerus due to the ANTERIOR movement of the shaft of the radius.
• The Arthrokinematics of Radiohumeral Flexion in a CLOSED KINETIC CHAIN.
• With Radiohumeral flexion the CONVEX surface of the humerus will glide POSTERIORLY as the head and shaft of the humerus roll ANTERIORLY on the concave surface of the radius.

Question 4

Elbow: Radiohumeral
Osteokinematic: Extension

Answer 4

• The Arthrokinematics of Radiohumeral Extension in an OPEN KINETIC CHAIN.
• With Radiohumeral extension the CONCAVE surface of the radius will roll and glide POSTERIORLY on the convex surface of the humerus due to the POSTERIOR movement of the shaft of the radius.
• The Arthrokinematics of Radiohumeral Extension in a CLOSED KINETIC CHAIN.
• With Radiohumeral extension the CONVEX surface of the humerus will glide ANTERIORLY as the head and shaft of the humerus roll POSTERIORLY on the concave surface of the radius.

Question 5

Forearm: Radiohumeral
Osteokinematic: Pronation

Answer 5

• Te arthrokinematics of radiohumeral Pronation in an any Kinetic chain.
• With Pronation the CONCAVE radius will spin MEDIALLY on the convex humerus.

Question 6

Forearm: Radiohumeral
Osteokinematic: Supination

Answer 6

• The arthrokinematics of radiohumeral supination in an any Kinetic chain.
• With supination the CONCAVE radius will spin LATERALLY on the convex humerus.

Question 7

Forearm: Distal Radioulnar
Osteokinematic: Pronation

Answer 7

• The arthrokinematics of the Distal radioulnar joint during pronation in the OPEN KINETIC CHAIN.
• With distal radioulnar pronation the CONCAVE radius with roll and glide MEDIALLY on the convex ulna.

Question 8

Forearm: Distal Radioulnar
Osteokinematic: Supination

Answer 8

• The arthrokinematics of the Distal radioulnar joint during supination in the OPEN KINETIC CHAIN.
• With distal radioulnar supination the CONCAVE radius with roll and glide LATERALLY on the convex ulna.

Question 9

Forearm: Proximal Radioulnar
Osteokinematic: Pronation

Answer 9

• The arthrokinematics of the proximal radioulnar joint during pronation in the OPEN KINETIC CHAIN.
• With proximal radioulnar pronation the CONVEX radius with glide LATERALLY as the shaft of the radius rolls MEDIALLY.

Question 10

Forearm: Proximal Radioulnar
Osteokinematic: Supination

Answer 10

• The arthrokinematics of the proximal radioulnar joint during supination in the OPEN KINETIC CHAIN.
• With proximal radioulnar supination the CONVEX radius with glide MEDIALLY as the shaft of the radius rolls LATERALLY.