After several weeks of feeling apathetic and dissatisfied with his life,Mark has suddenly become extremely cheerful and so talkative he can't be interrupted.He seems to need less sleep and becomes irritated when his friends tell him to slow down.Mark's behavior is indicative of

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Mark's sudden change in behavior, including increased talkativeness, decreased need for sleep, and irritability when asked to slow down, are all classic symptoms of a manic episode in bipolar disorder. Major depressive disorder is characterized primarily by a persistent low mood, while rumination refers to repeated negative thoughts and behaviors. Learned helplessness is a phenomenon in which an individual feels unable to control or affect their environment due to past experiences of failure or lack of control. None of these accurately describe Mark's current behavior.

After Several Weeks of Feeling Apathetic and Dissatisfied with His