english: On a more microscale, depression is associated  with a few things: the abnormal transmission or depletion of certain neurotransmitters, especially serotonin, norepinephrine, and dopamine, blunted circadian rhythms, or specific changes in the REM and slow-wave parts of your sleep cycle, and hormone abnormalities, such as high cortisol and deregulation of thyroid hormones.
non_english: Na mikroskopski ravni je depresija povezana z nekaj stvarmi: nenormalen prenos ali pomanjkanje določenih nevrotransmiterjev, še posebej serotonina, epinefrina in dopamina, moten cirkadialni ritem, ali specifične spremembe v REM fazi in delih ciklusa spanja s počasnimi valovi in hormonske abnormalnosti, kot naprimer visok kortizol in deregulacija ščitničnih hormonov.