Anhedonia 1 Article 1 Cognitive Dysfunction 1 Cognitive flexibility 1 DSM-5 1 Depressive Disorder, Major 1 Diagnostic and Statistical Manual of Mental Disorders 1 Hallucinogens 1 Hippocampal neurogenesis 1 Hippocampus 1 Humans 1 Negativity bias 1 Neuronal Plasticity 1 Pattern separation 1 Prefrontal Cortex 1 Psilocybin 1 Research Domain Criteria anhedonia 1 antidepressant activity 1 antidepressant agent 1 anxiety 1 anxiety disorder 1 bipolar disorder 1 brain derived neurotrophic factor 1 calcium channel 1 chronic stress 1 cognitive defect 1 corticosterone 1 corticotropin releasing factor 1 forced swim test 1