Research Output | Dar Al-hikmah Library | IIUM Only
Neurotransmission of serotonin and its derivative is said to be effected by changing of season in temperate countries. The effect of photoperiod and temperature can alter the production of serotonin and melatonin in body. The depression in serotonin availability in brain leads to a depressive or bipolar disorder. The activity of tryptophan hydroxyl