Final answer:
The question seems to mistakenly refer to 'basal mania' when it likely means 'bipolar disorder'. Bipolar disorder is marked by two extremes: mania and depression, representing high and low mood states, respectively.
Step-by-step explanation:
The term 'basal mania' does not appear to relate to an established medical condition, but it seems you might be referring to 'bipolar disorder,' which is characterized by two extremes of mood: mania and depression. Mania is an extreme high, where a person may experience increased energy, reduced sleep, grandiosity, and sometimes psychosis. On the other end, depression represents the low extreme, with symptoms like persistent sadness, low energy, feelings of hopelessness, and changes in sleep and appetite. Bipolar disorder is a disease of the brain that leads to significant disruptions in a person's life if not properly managed.