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Questions and Answers
Which nerve roots innervate the sternoclavicular joint?
What is the primary innervation for the trapezius muscle?
Which nerves provide motor innervation to the shoulder muscles?
What does afferent innervation refer to?
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Study Notes
- Shoulder muscles are innervated by nerves from the brachial plexus.
- Posterior cord nerves (axillary, subscapular, thoracodorsal) and more proximal nerves (dorsal scapular, long thoracic, pectoral, suprascapular) provide motor innervation.
- Trapezius muscle is primarily innervated by cranial nerve XI.
- Upper extremity nerve roots are listed in Appendix II, Parts A-C.
- Clinical assessment of motor and sensory C5-T1 nerve roots is covered in Appendix II, Parts D-E.
- Sternoclavicular joint is innervated by C3 and C4 nerve roots.
- Acromioclavicular and glenohumeral joints are innervated by C5 and C6 nerve roots.
- Sensory innervation is responsible for transmitting sensory information from the joints to the brain.
- Afferent innervation refers to sensory innervation.
- Suprascapular and axillary nerves provide sensory innervation to the acromioclavicular and glenohumeral joints.
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