 
 <prompt> Wetin be di benefit of di blood brain barrier? Based on di previous question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Another way to look at how brain dey work na to check wetin dey happun when specific parts of di brain dey damage. Even though di brain dey protected by skull and meninges, surrounded by cerebrospinal fluid, and isolated from di bloodstream by di blood-brain barrier, di brain dey delicate and fit dey vulnerable to plenty diseases and different types of damage. For humans, di effects of strokes and other types of brain damage don dey important source of information about how di brain dey work. But because we no fit control di kind of damage wey dey happun, e dey hard to interpret di information. For animal studies, we fit use rats mostly, to put electrodes or inject chemicals for specific parts of di brain to cause damage and then check wetin go happun to behavior. 