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Chapter 29 of the book "Psychiatric Mental Health Nursing: Concepts of Care in Evidence-Based Practice" is presented. It focuses on the consequences of dysfunctional grieving as manifested by mood disorders. It examines the predisposing factors implicated in the etiology of mood disorders that provide a framework for studying depression and bipolar disorder. It describes appropriate nursing interventions for behaviors associated with mood disorders.

A definition of the term "trace amines" is presented. It refers to the group of substances including tyramine, tryptamine and β-phenylethylamine, which are derived from the metabolism of amino acids and are present in many tissues of the body including the brain. Trace amines may function as neuromodulators although they are usually present at relatively low levels.