BLT	Bright Light Therapy
SCN	Suprachiasmatic Nucleus
CNS	Central Nervous System
SAD	Seasonal Affective Disorder
MDD	Major Depressive Disorder
BD	Bipolar Disorder
PTSD	Post-Traumatic Stress Disorder
ADHD	Attention-Deficit/Hyperactivity Disorder
ipRGCs	Intrinsically Photosensitive Retinal Ganglion Cells
OPN4	Opsin 4 (melanopsin)
RHT	Retinohypothalamic Tract
DLMO	Dim Light Melatonin Onset
PRC	Phase Response Curve
NMDA	N-Methyl-D-Aspartate
CaMKII	Calcium/Calmodulin-Dependent Protein Kinase II
MAPK	Mitogen-Activated Protein Kinase
ERK	Extracellular Signal-Regulated Kinase
PKA	Protein Kinase A
CREB	cAMP Response Element-Binding Protein
PACAP	Pituitary Adenylate Cyclase-Activating Polypeptide
PER	Period (clock genes)
CRY	Cryptochrome (clock genes)
CLOCK	Circadian Locomotor Output Cycles Kaput
BMAL1	Brain and Muscle ARNT-Like 1
AANAT	Arylalkylamine N-Acetyltransferase
RN	Raphe Nuclei
LHb	Lateral Habenula
pHb	Perihabenular Nucleus
vLGN	Ventral Lateral Geniculate Nucleus
IGL	Intergeniculate Leaflet
HPA	Hypothalamic–Pituitary–Adrenal Axis
DSM-5	Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition
CAPS-5	Clinician-Administered PTSD Scale for DSM-5