Final answer:
The Atlas refers to the posterior cervical specific nodes in the neck region, which can become swollen in infectious mononucleosis due to the Cd₈⁺ T-cell response.
Step-by-step explanation:
In the context of the given question, the Atlas refers to the posterior cervical specific nodes in the neck region. These lymph nodes can become swollen due to the Cd₈⁺ T-cell response in infectious mononucleosis.
Lymphadenopathy, or swelling of the lymph nodes, is a common symptom of infectious mononucleosis, and it often occurs in the posterior cervical specific nodes.