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

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