Upper Limb Anatomy Quiz

Upper Extremity Overview

• Comprises the arm, forearm, wrist, and hand.

Arm

• Extends from the glenoid cavity to the elbow.
• Contains the humerus, the sole bone of the arm.
• Muscles are grouped for shoulder movement:
  • Flexor muscle (Anterior): Responsible for flexing the elbow, notably the biceps brachii.
  • Extensor muscle (Posterior): Includes the triceps brachii, facilitating elbow extension.

Rotator Cuff Muscles

• Consists of five key muscles:
  • Deltoid
  • Supraspinatus
  • Infraspinatus
  • Teres minor
  • Subscapularis
• Essential for arm rotation.

Posterior Part of the Arm

• Houses the cephalic and basilic veins, important for venous drainage.
• Contains the brachial plexus, a network of nerves supplying the arm.
• The brachial artery is the major blood vessel supplying the arm.

Forearm

• Extends from the elbow to the wrist.
• Composed of two bones:
  • Ulna (medial)
  • Radius (lateral).

Forearm Muscles

• Grouped into flexor and extensor muscles:
  • Flexor muscles include:
    • Flexor carpi ulnaris
    • Flexor digitorum superficialis
    • Flexor carpi radialis
    • Palmaris longus
    • Pronator teres
    • Supinator
    • Pronator quadratus (not specifically mentioned but often included).