And finally, with hepatic encephalopathy, there may be Asterixis, which means hand tremor when the wrist is extended; altered consciousness, lethargy, seizure, or coma.
These include depressive disorders, typified by prolonged hopelessness and lethargy, and bipolar disorders, the most prominent of which involve alternating between depression and mania.
Springtime lethargy is the common name for a condition called spring asthenia, a form of seasonal affective disorder wherein seasonal changes result in physiological changes in our bodies.