At what cervical level spinal cord circumference is maximum
The cervical enlargement of spinal cord corresponds with the attachments of the large nerves which supply the upper limbs. It extends from about the third cervical to the second thoracic veebra, its maximum circumference (about 38 mm.) being on a level with the attachment of the sixth pair of cervical nerves.
C4
C5
C6
C7
General anatomy