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Questions and Answers
What are the spinal nerve root values that contribute to the radial nerve?
What are the spinal nerve root values that contribute to the radial nerve?
- C4-T2
- C5-T1 (correct)
- C6-T2
- C4-C8
From which part of the brachial plexus does the radial nerve originate?
From which part of the brachial plexus does the radial nerve originate?
- Medial cord
- Lateral cord
- Posterior cord (correct)
- Anterior division
Into which primary branches does the radial nerve divide?
Into which primary branches does the radial nerve divide?
- Muscular and cutaneous branches
- Deep and superficial branches (correct)
- Anterior and posterior branches
- Motor and sensory branches
The radial nerve primarily supplies muscles located in which compartments of the arm and forearm?
The radial nerve primarily supplies muscles located in which compartments of the arm and forearm?
Where is the radial nerve located relative to the lateral epicondyle of the humerus at the level of the elbow?
Where is the radial nerve located relative to the lateral epicondyle of the humerus at the level of the elbow?
Flashcards
Radial Nerve
Radial Nerve
A nerve that originates from the posterior cord of the brachial plexus, innervating the posterior arm and forearm.
Root Value
Root Value
The spinal nerve roots that give rise to the radial nerve, specifically C5 to T1.
Branches of Radial Nerve
Branches of Radial Nerve
The radial nerve has deep and superficial branches supplying muscles in the arm and forearm.
Location of Radial Nerve
Location of Radial Nerve
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Muscle Supply
Muscle Supply
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Study Notes
Radial Nerve
- Root value: C5-T1
- Origin: branch of the posterior cord of the brachial plexus
- Branches: deep and superficial branches
- Supplies: primary nerve of the posterior arm and forearm; supplies all muscles in these compartments
- Relationships:
- Passes posteriorly through the triangular interval around the humerus in the radial groove with the deep brachial artery
- Pierces lateral intermuscular septum and continues between brachialis and brachioradialis mm
- At the level of the elbow, it is found anterior to the lateral epicondyle
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