Definition: Isthalm is a concept in psychology that refers to a specific type of abnormality or malady. It's often associated with mental health disorders such as schizophrenia, bipolar disorder, and other forms of emotional instability or cognitive difficulties. The term "isthalm" comes from the German word "Ischalm," which means "coldness." This is because it can be described as a lack of warmth, warmthlessness, or coldness. It's often used to describe a person who