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Intercostobrachial nerve
From Wikipedia, the free encyclopedia
| Nerve: Intercostobrachial nerve | ||
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| Nerves of the left upper extremity. (Intercostobrachial nerve visible near top center.) | ||
| Latin | nervi intercostobrachiales | |
| Gray's | subject #211 946 | |
| From | intercostal nerves #2 and #3 | |
| Dorlands/Elsevier | n_05/12565946 | |
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.
 Cutaneous nerves of right upper extremity. Anterior view. |
 Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Anterior view. |
 Cutaneous nerves of right upper extremity. Posterior view. |
 Diagram of segmental distribution of the cutaneous nerves of the right upper extremity. Posterior view. |
- SUNY Labs 05:st-0505 - "Axillary Region: Nerves"
- Hand kinesiology at UK nerves/intercos.htm
- Intercostobrachial+nerves at eMedicine Dictionary
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 As such, some of the information contained herein may be outdated.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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| Cervical (8) | anterior (Cervical plexus, Brachial plexus) - posterior (Posterior branches of cervical nerves, Suboccipital, Greater occipital, Third occipital) |
| Thoracic (12) | anterior (Intercostal, Intercostobrachial - T2, Thoraco-abdominal nerves - T7-T11, Subcostal - T12) - posterior (Posterior branches of thoracic nerves) |
| Lumbar (5) | anterior (Lumbar plexus, Lumbosacral trunk) - posterior (Posterior branches of the lumbar nerves, Superior cluneal L1-L3) |
| Sacral (5) | anterior (Sacral plexus) - posterior (Posterior branches of sacral nerves, Medial cluneal nerves) |
| Coccygeal (1) | anterior (Coccygeal plexus) - posterior (Posterior branch of coccygeal nerve) |
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