Muscles of the Back

Overview

The muscles of the back support posture, control spinal movements and assist in upper limb function. This section introduces the layered organisation of the back musculature and explains the coordinated roles of the superficial, intermediate and deep groups.

Key Structures

Topics include the superficial muscles, which connect the upper limb to the trunk; the intermediate muscles, involved in respiratory movement; and the deep muscles, which stabilise and move the vertebral column. Each article outlines attachments, innervation and functional roles.

Clinical Relevance and Learning Focus

Back muscle anatomy is vital for assessing musculoskeletal pain, postural dysfunction and spinal movement disorders. Knowledge of these layers supports clinical reasoning, examination and rehabilitation planning.

+ Read more
Illustration of the superficial muscles of the back, highlighting their anatomical positions.

The Superficial Back Muscles

The Intermediate Back Muscles

An anatomical illustration of the posterior thorax and lower back showing the erector spinae muscles, labeled spinalis, longissimus, and iliocostalis.

The Intrinsic Back Muscles

Popular

Diagram illustrating the course and branches of the infraorbital nerve, including the inferior palpebral and superior labial nerves.
Encyclopaedia

Superior Labial Nerve

by Melissa Phu

Overview of the anatomical course of the facial nerve (CN VII).
The Cranial Nerves

The Facial Nerve (CN VII)

by Liam Curry

Illustration of the muscles of the anterolateral abdominal wall, highlighting the aponeuroses formed by the flat muscles.
Encyclopaedia

Rectus Abdominis

by Aren Mnatzakanian