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?
From which part of the brachial plexus does the ulnar nerve arise?
From which part of the brachial plexus does the ulnar nerve arise?
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?
Which muscles are innervated by the ulnar nerve in the forearm?
Which muscles are innervated by the ulnar nerve in the forearm?
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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?
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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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Description
This quiz explores the anatomy and functions of the ulnar nerve, focusing on its origin, root values, and the muscles it supplies. It covers key concepts like its role in fine movements of the hand and co-innervation details. Test your knowledge on this essential component of the nervous system.
