C7, the vertebra prominens, has the longest spinous process of all cervical vertebrae and is palpable as the prominent bony prominence at the base of the neck, making it a key surface landmark for counting vertebral levels.
C7 is known as the vertebra prominens because its long non-bifid spinous process is the most prominent bony landmark at the base of the neck and used for counting vertebral levels. C6-C7 disc herniation produces C7 radiculopathy with triceps weakness and diminished triceps reflex, and middle finger numbness. The transverse foramina of C7 do not usually transmit the vertebral arteries (they enter at C6).
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