The C5-C6 disc is the most commonly herniated cervical disc, compressing the C6 nerve root to produce the most frequent cervical radiculopathy syndrome — lateral arm pain, thumb and index finger numbness, biceps weakness, and diminished biceps reflex. The uncovertebral joints at C5-C6 frequently develop osteophytes that narrow the neuroforamen, producing the foraminal stenosis of cervical spondylotic radiculopathy.
C6 radiculopathy from C5-C6 disc herniation produces the characteristic thumb and radial forearm paraesthesia, biceps weakness, and reduced biceps reflex. Spurling test (cervical extension with ipsilateral rotation and axial compression) reproduces radicular symptoms. ACDF (anterior cervical discectomy and fusion) at C5-C6 provides faster radiculopathy relief than non-operative management for neurological deficit.
C6 radiculopathy from disc protrusion producing thumb paraesthesia and biceps weakness managed with ACDF for neurological deficit.
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