Arm Musculature

Question 1

Biceps Brachii

Answer 1

★ Insertion
Radial tuberosity of the radius
★ Isolated function
Concentrically accelerates elbow flexion, supination of the radioulnar joint, and shoulder flexion
★ Integrated function
Eccentrically decelerates elbow extension, pronation of the radioulnar joint and shoulder extension
Isometrically stabilizes the elbow and shoulder girdle

Question 2

Triceps Brachii

Answer 2

★ Insertion
Olecranon process of the ulna
★ Isolated function
Concentrically accelerates elbow extension, and shoulder extension
★ Integrated function
Eccentrically decelerates elbow flexion and shoulder flexion
Isometrically stabilizes the elbow and shoulder girdle

Question 3

Brachioradialis

Brachialis

Answer 3

★ Insertion
Brachioradialis - Lateral surface of distal radius immediately above styloid process
Brachialis - tuberosity and coronoid process of the ulna
★ Isolated function
Concentrically accelerates elbow flexion
★ Integrated function
Eccentrically decelerates elbow extension
Isometrically stabilizes the elbow