Bones of the Abdomen

Overview

The lumbar spine forms the supportive posterior boundary of the abdomen and plays a key role in weight-bearing and movement. This section introduces its structural features and regional organisation.

Key Structures

Coverage includes the vertebral structure, intervertebral joints and supporting ligaments of the lumbar spine, highlighting their functional adaptations.

Clinical Relevance and Learning Focus

Understanding lumbar anatomy is essential for assessing back pain, nerve compression, spinal trauma and regional anaesthesia. This foundation supports safe examination and imaging interpretation.

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The Lumbar Spine

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Illustration of the obturator canal, showing the obturator membrane within the obturator foramen of the pelvis.
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Obturator Artery

by Charlotte Eeckelers

Illustration of the muscles of the medial thigh with anterior compartment muscles removed, highlighting the adductor group.
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Adductor Longus

by Dr Oliver Jones

Illustration of the posterior cutaneous nerve of the thigh, showing its innervation to the lower medial gluteal quadrant and posterior thigh.
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Posterior Cutaneous Nerve of the Thigh

by Mihir Himanshu Majeethia