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Lateral Cutaneous Branch of Sixth Intercostal Nerve (Left)
Nervous System

Lateral Cutaneous Branch of Sixth Intercostal Nerve (Left)

Ramus cutaneus lateralis nervi intercostalis sexti

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The lateral cutaneous branch of anterior ramus of sixth thoracic nerve (or sixth intercostal nerve) arises from the anterior ramus of the sixth thoracic nerve roughly along the mid-axillary line.


The lateral cutaneous branch may travel for a short distance with its parent nerve (the anterior ramus) within the intercostal space. It then pierces the thoracic wall through the internal and external intercostal muscles, emerging just anterior to the serratus anterior muscle.


The lateral cutaneous branch further subdivides into anterior and posterior branches. The anterior branches extend towards the pectoralis major, while the posterior branches extend backwards towards the latissimus dorsi muscle.

Supplied Structures & Function

The lateral cutaneous branch of the sixth intercostal nerve (or anterior ramus of sixth thoracic nerve) conveys sensory innervation from the skin overlying the sixth intercostal space. See our dermatome map for cutaneous innervation.

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Intercostal Nerve

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Slipping rib syndrome is produced by impingement of an intercostal nerve between two costal cartilages, secondary to the subluxation of an interchondral articulation.

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