Amyotrophic lateral sclerosis (ALS), also known as motor neuron disease or Lou Gehrig's disease is a severe neurodegenerative pathology (disease causing degeneration of neurons) of unknown cause and no curative treatment.
Bipolar disorder is characterized by cyclical mood changes that manifest as depressive episodes alternating with episodes of elation or mania in different degrees of intensity.
Delirium, also called acute confusional state, is a serious disturbance of the patient's mental function, characterized by disturbances of consciousness, with reduced concentration, memory alterations, mental confusion and altered perception of the environment. The onset of delirium is usually sudden, evolving within hours or a few days.