This is the Buddha's own account of the final stage of his enlightenment under the Bodhi tree as supposedly related directly to his immediate disciple and personal attendant Ananda:

"I thought: 'This is the path to enlightenment that I have now reached, that is to say: With cessation of name-and-form there is cessation of consciousness; with cessation of consciousness, cessation of name-and-form"

It would seem that consciousness and name-and-form are intimately related to each other, since each ceases with the cessation of the other.