Intercostobrachial nerve
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| Nerve: Intercostobrachial nerve | ||
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| Nerves of the left upper extremity. (Intercostobrachial nerve visible near top center.) | ||
| Gray's | subject #211 946 | |
The lateral cutaneous branch of the second intercostal nerve does not divide, like the others, into an anterior and a posterior branch; it is named the intercostobrachial nerve.
It pierces the Intercostalis externus and the Serratus anterior, crosses the axilla to the medial side of the arm, and joins with a filament from the medial brachial cutaneous nerve.
It then pierces the fascia, and supplies the skin of the upper half of the medial and posterior part of the arm, communicating with the posterior brachial cutaneous branch of the radial nerve.
The size of the intercostobrachial nerve is in inverse proportion to that of the medial brachial cutaneous nerve.
A second intercostobrachial nerve is frequently given off from the lateral cutaneous branch of the third intercostal; it supplies filaments to the axilla and medial side of the arm.
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This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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| Spinal nerves | |
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ventral root - dorsal root - dorsal root ganglion - cauda equina - gray ramus communicans - white ramus communicans posterior divisions: cervical (greater occipital, third occipital) - thoracic - lumbar - sacral - coccygeal anterior divisions: cervical plexus - brachial plexus - thoracic nerves: (intercostal - intercostobrachial - subcostal) - lumbosacral plexus | |
