Located of the brainstem; controls breathing and heartbeat; connects the medulla to the two sides of the cerebellum to help coordinate and integrate movement on each side of side of the body; involved in sleep and dreaming.
Common symptoms of a brown recluse spider bite include shivering, vomiting, nausea, fever, itching, shock and restlessness. The bite may come out as an injury of about 1 to 2 3/4 inches which takes several months of healing and will leave you with unsightly scars. The bite is usually deep and will cause pain eventually.
1 Other symptoms include fever, chills, nausea, vomiting, muscle aches and hemolytic anemia (a condition where the red blood cells are destroyed).  People bitten by an unseen spider sometimes blame the brown recluse spider because their bite resembles a brown recluse spider bite.