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Anatomy of a typical intercostal nerve: origin, course, relations, and branches

Creator: Medical Education Team
Published: 2025-03-17T12:49:56.159Z
Keywords: intercostal nerve, thoracic nerves, human anatomy, nerve branches

Branches of the intercostal nerve and their functions

Intercostal nerves are thoracic spinal nerves responsible for motor and sensory functions in the thoracic region.

6/6/2025• 4 min read• 55 views

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normalintermediateHuman Anatomy

Intercostal Nerve Anatomy: Origin, Course, and Branches

Anatomy of a Typical Intercostal Nerve

The intercostal nerves are vital structures of the thoracic region, originating from the anterior rami of the thoracic spinal nerves (T1–T11). These nerves travel along the intercostal spaces and provide both motor and sensory innervation...

Origin and Course

Each intercostal nerve emerges from the spinal cord and courses between the internal and innermost intercostal muscles...

Branches and Functions

Muscular Branches: Innervate the intercostal muscles, facilitating respiration.
Cutaneous Branches: Provide sensory input to the skin overlying the thoracic and abdominal regions.
Collateral Branches: Ensure redundancy in innervation.