A small carriage propelled by a steam turbine powered engine was apparently invented by Ferdinand Verbiest, a Belgian, in 1672 while in China. It is argued that this constitutes the first 'car' ever invented, but the design was only 65cm long, had no seats or pilot controls, and was intended as little more than a toy.
In bipolar disorder, mixed state is a condition during which symptoms of both mania and depression occur simultaneously. Individuals experiencing a mixed state may have manic symptoms such as grandiose thoughts while simultaneously experiencing depressive symptoms such as excessive guilt or feeling suicidal.
For each type, the exact symptoms of bipolar disorder can vary from person to person. Bipolar I and bipolar II disorders also have additional specific features that can be added to the diagnosis based on your particular signs and symptoms.igns and symptoms of bipolar I and bipolar II disorders may include additional features. 1  Anxious distress â having anxiety, such as feeling keyed up, tense or restless, having trouble concentrating because of worry, fearing something awful may happen, or feeling you may not be able to control yourself.