Final answer:
The symptom of a manic episode not related to depression is being talkative, whereas concentration problems, agitation, and sleep disturbance can be seen in both manic and depressive states. The manic phase also includes significantly elevated activity and energy levels.
Step-by-step explanation:
The symptom of a manic episode that is not related to depression is being talkative. During a manic episode, an individual may exhibit increased talkativeness, which is not commonly associated with depressive episodes. Instead, symptoms such as concentration problems, agitation, and sleep disturbance are often experienced in both manic and depressive states. The manic phase of bipolar disorder can lead to symptoms such as a decreased need for sleep, heightened energy and activity levels, inflated self-esteem, and excessive involvement in activities with a high potential for painful consequences.