Podcast
Questions and Answers
Which spinal nerve roots contribute to the formation of the ulnar nerve?
Which spinal nerve roots contribute to the formation of the ulnar nerve?
- C7, C8
- C5, C6
- C6, C7
- C8, T1 (correct)
From which part of the brachial plexus does the ulnar nerve arise?
From which part of the brachial plexus does the ulnar nerve arise?
- Medial cord (correct)
- Posterior cord
- Superior trunk
- Lateral cord
In which regions of the upper limb does the ulnar nerve NOT have any branches?
In which regions of the upper limb does the ulnar nerve NOT have any branches?
- Axilla and hand
- Arm and forearm
- Forearm and hand
- Axilla and arm (correct)
Which muscles are innervated by the ulnar nerve in the forearm?
Which muscles are innervated by the ulnar nerve in the forearm?
Excluding the thenar muscles and the first two lumbricals, which other intrinsic hand muscle does the ulnar nerve not innervate?
Excluding the thenar muscles and the first two lumbricals, which other intrinsic hand muscle does the ulnar nerve not innervate?
Flashcards
Ulnar Nerve
Ulnar Nerve
A nerve originating from the medial cord of the brachial plexus, involved in arm and hand function.
Root value of Ulnar Nerve
Root value of Ulnar Nerve
The specific spinal nerves C8 and T1 that contribute to the ulnar nerve.
Supplies of Ulnar Nerve
Supplies of Ulnar Nerve
Innervates flexor carpi ulnaris and part of the flexor digitorum profundus, plus hand muscles except thenar muscles and first two lumbricals.
Intrinsic muscles of the hand
Intrinsic muscles of the hand
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Branches of Ulnar Nerve
Branches of Ulnar Nerve
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Study Notes
Ulnar Nerve
- Root value: C8, T1
- Origin: Branch of the medial cord of the brachial plexus
- Branches: No branches in the axilla or arm
- Supplies:
- Flexor carpi ulnaris (FCU) and the medial half of the flexor digitorum profundus (FDP); often co-innervates the part of the FDP inserting into the 3rd digit
- Primary nerve of the hand, referred to as the nerve of fine movements; supplies all intrinsic hand muscles except the thenar muscles and the first two lumbricals; often innervates the deep head of the flexor pollicis brevis
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