Clavicle and Its Joints Quiz

Clavicle

• A long bone located at the anterior aspect of the shoulder girdle.
• Ossification occurs through membranous processes.
• Sternoclavicular joint: synovial, saddle type; allows elevation, depression, protraction, and retraction.
• Acromioclavicular joint: synovial, plane type; permits gliding movements.

Scapula

• A flat bone situated at the posterior side of the shoulder girdle.
• Acromioclavicular joint: synovial, plane type; allows gliding movements.
• Shoulder joint: synovial, multi-axial, ball and socket type; enables flexion, extension, adduction, abduction, medial rotation, and lateral rotation.

Humerus

• A long bone forming the upper arm.
• Shoulder joint: synovial, multi-axial, ball and socket; allows flexion, extension, adduction, abduction, medial rotation, and lateral rotation.
• Elbow joint: synovial, hinge type; facilitates flexion and extension.

Radius

• A long bone located on the lateral side of the forearm.
• Elbow joint: synovial, hinge type; allows flexion and extension.
• Wrist joint: synovial, ellipsoid type; facilitates flexion, extension, adduction, and abduction.
• Superior radio-ulnar joint: synovial, pivot type; enables pronation and supination.
• Inferior radio-ulnar joint: synovial, pivot type; also allows pronation and supination.

Ulna

• A long bone positioned medially in the forearm.
• Elbow joint: synovial, hinge type; involved in flexion and extension.
• Superior radio-ulnar joint: synovial, pivot type; supports pronation and supination.
• Inferior radio-ulnar joint: synovial, pivot type; facilitates pronation and supination.

Movements of Forearm

• Medial rotation is called "pronation."
• Lateral rotation is referred to as "supination."

Bones of the Hand

• Comprised of phalanges, metacarpal bones, and carpal bones.
• Wrist joint: synovial, ellipsoid type; allows flexion, extension, abduction, and adduction.
• Intercarpal joints: synovial, plane type; permit gliding movements.
• Carpo-metacarpal joint of the thumb: synovial, saddle type; allows flexion, extension, adduction, and abduction.
• Interphalangeal joints: synovial, hinge type; enable flexion and extension.
• Metacarpo-phalangeal joints of the medial four fingers: synovial, condylar type; permit flexion, extension, adduction, and abduction.

Pisiform Bone

• The most medial carpal bone in the proximal row.