In physiology and medicine,<unk> refers to a lowering, in particular a reduction in a specific biological variable or the functions of an organ. It is the opposite of elevation. For example, it is possible to refer to "depressed thyroid function" or to a<unk> of blood flow in a particular area. Further examples: *<unk> of the central nervous system of an animal may be expressed as drowsiness or sleep, lack of coordination and unconsciousness. * Respiratory<unk> or hypoventilation.
Depression 
Late life depression
Double depression
Mood disorder
Retarded depression
Anxiety disorder
Psychosis
Diving disorders