Question:medium
Which among the following is a branch from the trunk of the brachial plexus?
Which among the following is a branch from the trunk of the brachial plexus?
Show Hint
The suprascapular nerve arises from the upper trunk; pectoral nerves come from the cords.
Updated On: Jun 24, 2026
- Suprascapular nerve
- Lateral thoracic nerve
- Anterior thoracic nerve
- Nerve to subclavius
Show Solution
The Correct Option is A
Solution and Explanation
Solve this by walking down the brachial plexus and noting which structure gives off which named nerve. The plexus is built from roots, then trunks, then divisions, then cords, then terminal branches, and small branches peel off at each stage.
Focus on the trunk level. The upper trunk is the part that gives off named supraclavicular branches: the suprascapular nerve and the nerve to subclavius both arise here. The suprascapular nerve is the textbook example of a trunk branch and is what such questions are testing.
Now eliminate the distractors. The lateral pectoral nerve, sometimes called the lateral or anterior thoracic nerve, comes off the lateral cord. The medial pectoral nerve comes off the medial cord. Neither pectoral nerve is a trunk branch, so the thoracic-nerve options are wrong.
That leaves the suprascapular nerve as the recognised branch arising from the trunk of the brachial plexus, which is the answer.
\[\boxed{\text{Suprascapular nerve}}\]
Focus on the trunk level. The upper trunk is the part that gives off named supraclavicular branches: the suprascapular nerve and the nerve to subclavius both arise here. The suprascapular nerve is the textbook example of a trunk branch and is what such questions are testing.
Now eliminate the distractors. The lateral pectoral nerve, sometimes called the lateral or anterior thoracic nerve, comes off the lateral cord. The medial pectoral nerve comes off the medial cord. Neither pectoral nerve is a trunk branch, so the thoracic-nerve options are wrong.
That leaves the suprascapular nerve as the recognised branch arising from the trunk of the brachial plexus, which is the answer.
\[\boxed{\text{Suprascapular nerve}}\]
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