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.
Serious symptoms related to the bite of a brown recluse spider include low platelet count, destruction of the red blood cells, blot clots in capillaries, inability to form clots, acute renal failure or kidney damage, coma, and death.
A brown recluse spider also has only three pairs of eyes instead of the typical four pairs. If you are bitten, you might feel a stinging sensation followed by an intense pain and redness. Eventually, the area of bite expands and develops a deep ulcer. Systematic symptoms include fever and nausea.