Feeling ‘meh’ about daily life might signal higher than normal stress
Anhedonia can be present without depression, researcher says
Diego Pizzagalli, PhD, is the founding director of the Noel Drury, MD Institute for Translational Depression Discoveries at UC Irvine.
IN THE NEWS: Finding little joy in dinner with friends or on a leisurely walk is known as anhedonia, a Greek word that is defined as “without pleasure.” Occasional “meh” feelings are considered a part of the human experience, but longer spells could indicate prolonged stress or mental health challenges.
Diego Pizzagalli, PhD, a Distinguished Professor in the Department of Psychiatry & Human Behavior at the UC Irvine School of Medicine, recently spoke with BBC Science Focus about the expanded definition of anhedonia, which now includes a lack of motivation to seek pleasure.
“It’s basically that the effort, literally the cognitive or physical effort, is just too large. And so, [a person] will not initiate [the activity].”
This might be due to a reduction in dopamine, which has been observed in those diagnosed with anhedonia. Dopamine dysfunction can be caused by depression, schizophrenia, substance abuse and, commonly, chronic stress.
“But when the stressor becomes uncontrollable, chronic and sustained, then you get a profound downregulation of dopamine. That actually has been linked very clearly to anhedonic phenotypes [patterns of behavior].”
Pizzagalli conducted a study in 2022 of young adults who had experienced maltreatment as young children. Although not diagnosed with depression, their brains’ reward systems were less active when they imagined a potential reward – a warning sign for anhedonia.
Pizzagalli is the founding director of the Noel Drury, MD Institute for Translational Depression Discoveries at UC Irvine. His primary research goals are to improve the understanding of the psychological, environmental and neurobiological factors associated with mood disorders, especially major depression.
Pizzagalli is also a Distinguished Professor of Neurobiology and Behavior in the School of Biological Sciences and a professor of biomedical engineering in the Henry Samueli School of Engineering.
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