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.
The bite of the black widow may not be very painful at first. Pain onset usually is gradual and usually takes the form of back and belly pain that can last for hours or even days. The bite of the brown recluse (and 12 other recluse spiders in North America) can be mild and just cause a mild, itchy bump. But in severe cases, the bite may be painless at first, but over the next two to eight hours develop a sharp, deep pain followed by a burning feeling.