Diaphragm Muscle

From Anvita Health Wiki

Contents 1 More Specific Terms 2 Introduction 3 Pathology 4 Physiology 5 Innervation 6 More General Terms 7 Additional Terms 8 References

More Specific Terms

• crura of diaphragm (crus)
• diaphragmatic surface of (lung/liver/spleen/heart)
• hemidiaphragm
• lumbocostal triangle of diaphragm (vertebrocostal trigone or triangle, Bochdalek gap)
• muscular part of diaphragm
• sternocostal triangle of diaphragm (sternocostal foramen)

Introduction

• A continuous sheet of muscle & tendon, normally broken up only by major structures (i.e. esophagus, inferior vena cava, aorta) passing from thorax to abdomen. It is the main muscle of inspiration in normal individuals.

Pathology

• Pain from the diaphragm may radiate to the shoulder

Physiology

• Normal expiratory to inspiratory excursion of the diaphragm is 5-7 cm.

Innervation

• motor:

• phrenic nerves ( C3-C5)
• right & left halves innervated by right & left phrenic nerves

• sensory

• phrenic nerves
• lower intercostal nerves

More General Terms

• skeletal muscle (voluntary muscle)
• musculoskeletal system structure

Additional Terms

• diaphragmatic calcification
• diaphragmatic paralysis

References

1. Harrison's Principles of Internal Medicine, 12th ed. Wilson et al (eds), McGraw-Hill Inc. NY, 1991, pg 1115-16
2. Mayo Internal Medicine Board Review, 1998-99, Prakash UBS (ed) Lippincott-Raven, Philadelphia, 1998, pg 722

diaphragm muscle