Describe the difference in schizophrenia, clinical depression, and bipolar disorder

Schizophrenia is a type of psychosis, a state of extremely disordered thinking, manifesting as a break with reality. Persons with schizophrenia are unable to distinguish reality from hallucinations or delusions within their own minds. Hallucinations are false perceptions of the five senses (e.g., seeing images that are not pre sent, hearing internal voices, feeling skin sensations that are not the result of external stimuli, tasting or smelling things that are not real). Delusions are false ideas that have no basis in fact (e.g., belief that the FBI is pursuing a person, that food is being poisoned, that the person has been chosen by a supreme being as the recipient of a divine message for the world). The root causes for the chemical changes in the brain that result in schizophrenic psychoses are not yet known.
Clinical depression appears as a deep feeling of melancholy and futility that is not situational in nature. It too results from chemical imbalances in the brain that are stress induced, but the reason for this reaction to stress in some persons and not in others remains unknown.

Bipolar disorder presents a spiral of behavior that typically begins with an episode of extreme euphoria, which in its early stages may even be highly creative, but that degenerates into hallucination and/or delusional thinking. This phase is usually followed by a very deep depression, often reaching suicidal proportions, from which only medication can lift a person.

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