Identify the symptoms associated with depression and mania.
Symptoms of Depression: Major depressive disorder is characterised by a period of depressed mood and/or loss of interest or pleasure in most activities. Other associated symptoms include a change in body weight, constant sleep problems, tiredness, inability to think clearly, agitation, and greatly slowed behaviour. Individuals may also experience thoughts of death and suicide, along with excessive guilt or feelings of worthlessness.
Symptoms of Mania: Based on the context, manic episodes rarely appear by themselves. They usually alternate with depression and are sometimes interrupted by periods of normal mood. Mania and depression are alternately present in disorders like Bipolar I disorder.
Explanation
The answer directly extracts the defining symptoms of major depressive disorder from the provided text, such as changes in mood, body weight, sleep, and thoughts of death. For mania, the provided context does not list specific standalone symptoms like inflated self-esteem; it only describes how manic episodes manifest in relation to depression, such as alternating with it and rarely appearing on their own.