I believe the answer is: They are based on the arbitrary borders of old European empires
African continent was colonized by different european empire. To avoid conflicts among the european, they divided africa into several territories and dtermine which country has the jurisdiction over each territories. After African nations gained independence, they still use this separation as borders to differentiate one country with another.
The swiss psychiatrist Eugen bleuler coined the term "schizophrenia," the kind of split that he believed was central to the disorder was the splitting of the mind.
A disorder that affects your ability to think, feel, and act clearly.
The exact cause of schizophrenia is unknown, but it may involve a combination of genetics, environment, and changes in brain chemistry and structure.
Schizophrenia is characterized by the appearance of thoughts and experiences being separated from reality, disorganized behavior and behavior, and reduced participation in daily activities. There is also a decrease in concentration and memory.
Treatment is usually lifelong and often combines medication, psychotherapy, and coordinated specialty care.
Learn more about schizophrenia here:brainly.com/question/7201954
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