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Anterior Cutaneous Branch of Eleventh Intercostal Nerve (Left)
Nervous System

Anterior Cutaneous Branch of Eleventh Intercostal Nerve (Left)

Ramus cutaneus anterior nervi intercostalis undecimi

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Origin

The anterior cutaneous branch arises as the terminal branch of the eleventh intercostal nerve.

Course

As the terminal portion of the eleventh intercostal nerve pierces through the anterior rectus sheath, it becomes the anterior cutaneous branch.

Branches

The anterior cutaneous branches divide into medial and lateral branches that extend over the rectus sheath.

Supplied Structures & Function

The anterior cutaneous branch conveys sensory information from the skin of the anterior abdominal wall, just below the umbilicus. See our dermatome map for cutaneous innervation.

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Intercostal Nerve

ScienceDirect image

The intercostal nerve frequently runs within the middle of the intercostal space (73% of the time) and occasionally courses along the inferior aspect of the intercostal space just above the subjacent rib (Hardy, 1988).

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