Median Nerve Function and Anatomy

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Questions and Answers

Which spinal nerve roots contribute to the formation of the median nerve?

  • C4-C8
  • C5-T1 (correct)
  • C7-C8
  • C6-T2

Where does the median nerve originate?

  • Posterior cord of the brachial plexus
  • Lateral cord of the brachial plexus only
  • Medial cord of the brachial plexus only
  • Lateral and medial cords of the brachial plexus (correct)

In which anatomical regions does the median nerve NOT have branches?

  • Forearm and hand
  • Hand and axilla
  • Axilla and arm (correct)
  • Arm and forearm

Which muscle in the anterior forearm IS NOT supplied by the median nerve?

<p>Flexor carpi ulnaris (B)</p> Signup and view all the answers

Aside from the thenar muscles, which other hand muscles does the medial nerve supply?

<p>First two lumbricals (D)</p> Signup and view all the answers

Flashcards

Median Nerve Root Value

C5-T1, which indicates the spinal segments contributing to the median nerve.

Formation of Median Nerve

Formed by the lateral and medial cords of the brachial plexus.

Median Nerve Branches

No branches are present in the axilla or arm for the median nerve.

Muscles Supplied by Median Nerve

Supplies all anterior forearm muscles, except FCU and part of FDP.

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Innervation of Hand by Median Nerve

Supplies three thenar muscles and first two lumbricals in the hand.

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Study Notes

Median Nerve

  • Root value: C5-T1
  • Origin: formed by lateral and medial cords of the brachial plexus
  • Branches: no branches in the axilla or the arm
  • Supplies:
    • Primary nerve of the anterior forearm, supplying all muscles in this compartment, except flexor carpi ulnaris (FCU) and the medial half of flexor digitorum profundus (FDP).
    • Frequently co-innervates the FDP part inserting into the 3rd digit.
    • Supplies the three thenar muscles, excluding the deep head of flexor pollicis brevis, and the first two lumbricals of the hand.

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