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 extrinsic muscles of the tongue, excluding the palatoglossus muscle.
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Genioglossus

by Max Bidewell

Illustration of the fibularis longus and brevis muscles in the lateral leg.
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Fibularis (Peroneus) Longus

by Roxanne Salkeld

Illustration showing the course of the ilioinguinal nerve within the lumbar plexus.
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Ilioinguinal Nerve

by Mihir Himanshu Majeethia