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AN10.1-13 | Introduction to Axilla, Shoulder and Scapular region
Learning Objectives
- Describe the boundaries and contents of the axilla, including axillary artery, vein, and lymph nodes (AN10.1, AN10.2, AN10.4, AN10.7)
- Trace the formation of the brachial plexus and explain the clinical significance of Erb's palsy and Klumpke's paralysis (AN10.3, AN10.5, AN10.6)
- Describe the muscles acting on the shoulder joint — trapezius, latissimus dorsi, rotator cuff (SITS), and serratus anterior (AN10.8, AN10.9, AN10.10, AN10.12)
- Explain the anatomy of the shoulder joint, its movements, and the scapular anastomosis (AN10.11, AN10.13)
- Identify the clinical consequences of axillary nerve injury and understand safe intramuscular injection technique (AN10.12)
INSTRUCTIONS
This module covers the axilla (armpit), brachial plexus (the nerve highway to your arm), and shoulder region. We'll start from what you can feel on your own body and build from there.
Parallel connections: In Physiology, you're learning about nerve conduction and muscle contraction — the same mechanisms that power shoulder movements. In Biochemistry, you're studying extracellular matrix proteins (collagen, elastin) — these form the tendons and ligaments that hold the shoulder joint together.
References
- OpenStax Anatomy and Physiology 2e, Chapter 11: The Muscular System (textbook (CC BY 4.0))
- B.D. Chaurasia's Human Anatomy, Vol. 1, Ch 5-7: Pectoral Region, Axilla, Shoulder (textbook)
- Netter's Atlas of Human Anatomy, 8th ed., Plates 408–423 (Shoulder and Axilla) (atlas)
- Gray's Anatomy for Students, 4th ed., Chapter 7: Upper Limb (textbook)
Version 2.0 | Claude (AI-generated), NMC CBUC 2024, Adapted from OpenStax A&P 2e (CC BY 4.0)