There are 7 cervical vertebrae but 8 cervical nerves. The 8th cervical nerves is below the 7th vertebra and the first nerve is above the first vertrbra. Seven cervical vertebrae extend between the scull and the thoracic cage part of the body.

• There are 7 cervical vertebrae but 8 cervical nerves. The 8th cervical nerves is below the 7th vertebra and the first nerve is above the first vertrbra. Seven cervical vertebrae extend between the scull and the thoracic cage part of the body.

• Roots emerge from the cord in a continuous row along the dorsal root entry zone where the dorsal lateral fasciculus lies.

• Segmentation for the roots into nerve bundles is a function of the intervertebral foramen and the DRG’s on these roots.

• The brachial plexus arises from segments C5 through T1.