Overview of Upper Limb - LO 2

2. Describe the main muscle groups or muscle compartments of the upper limb.

The upper limb consists of four major segments. Each of these segments is divided into regions/muscle compartments for more precise description.

• Shoulder

  • Axio-appendicular muscles moving the glenohumeral joint & pectoral girdle

    • Most of these muscles were discussed and dissected in previous sessions and include: pectoralis major & minor, trapezius, rhomboids, latissimus dorsi, etc.

  • Intrinsic shoulder muscles

• Arm (brachium)

  • Anterior (flexor) compartment

  • Posterior (extensor) compartment

• Forearm (antebrachium)

  • Anterior (flexor/pronator) compartment

  • Posterior (extensor/supinator) compartment

• Hand 

  • Thenar compartment

  • Adductor compartment

  • Hypothenar compartment

  • Central compartment

  • Interosseous compartment