Final answer:
Serotonin, a monoamine neurotransmitter, is closely associated with mood regulation and is one potential cause of mood swings. Antidepressants often work by affecting serotonin levels in the brain. Other neurotransmitters like dopamine and norepinephrine are also associated with mood and mental health.
Step-by-step explanation:
A neurotransmitter that may be responsible for mood swings is serotonin. Serotonin, also known as 5-hydroxytryptamine or 5-HT, is a monoamine neurotransmitter that is mainly found in the central nervous system (CNS) and is a critical player in regulating mood, among other functions. Alterations in serotonin levels can lead to mood disorders such as depression, and drugs that alter serotonin levels, such as antidepressants, are used to help bring serotonin levels back to normal. Some antidepressants work by blocking the reuptake of serotonin, which increases its availability in the synaptic cleft, potentially improving mood and reducing symptoms of depression.
Another neurotransmitter associated with mood and mental health is dopamine. Dopamine is linked with pleasure and reward pathways in the brain. Imbalances in dopamine levels can contribute to mood swings and are studied in the context of various psychological disorders. In addition, norepinephrine, also known as noradrenaline, is a neurotransmitter that can influence mood and is considered when evaluating antidepressants. Altered levels of norepinephrine can also affect mood and contribute to conditions such as depression.