Review Note
Last Update: 04/01/2024 02:30 AM
Current Deck: Neurology::Neuromuscular
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Muscles involved in C5 radiculopathy?
{{c1::RIDS:
{{c1::RIDS:
- Rhomboid
- Infraspinatus
- Deltoid
- Supraspinatus
- and to a lesser degree biceps, brachioradialis, brachialis
Notes
C5 Radiculopathy Pathophysiology Outline:
- C5 Radiculopathy: A C5 radiculopathy specifically involves the nerve root that exits the spinal column at the level of the fifth cervical vertebra. This nerve root provides motor innervation to certain muscles in the shoulder and arm, and sensory innervation to specific areas of skin.
- Muscle Involvement: The muscles most commonly affected by a C5 radiculopathy are the supraspinatus, infraspinatus, deltoid, and rhomboid muscles. These muscles are primarily responsible for movements of the shoulder joint, such as abduction (lifting the arm away from the body), external rotation, and retraction of the scapula (pulling the shoulder blades together).
- Lesser Involvement: The biceps, brachioradialis, and brachialis muscles are also innervated by the C5 nerve root, but to a lesser extent. These muscles are primarily involved in flexion of the elbow.
- Clinical Presentation: Clinically, a C5 radiculopathy can present with weakness in the affected muscles, decreased reflexes (such as the biceps reflex), and sensory changes in the area of skin supplied by the C5 nerve root. Pain may also be present and is often felt in the shoulder area.
In summary, a C5 radiculopathy can affect several muscles in the shoulder and arm, leading to specific motor and sensory changes. The most commonly affected muscles are the supraspinatus, infraspinatus, deltoid, and rhomboid muscles, with lesser involvement of the biceps, brachioradialis, and brachialis muscles.
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