ANATOMY

Detailed explanation-1: -The main function of the pineal gland is to receive and convey information about the current light-dark cycle from the environment via the production and secretion of melatonin cyclically at night (dark period) (6, 7).

Detailed explanation-2: -Your pineal gland’s main job is to help control the circadian cycle of sleep and wakefulness by secreting melatonin. The pineal gland is shaped like a tiny pinecone, which is how it got its name (“pine”-al gland).

Detailed explanation-3: -Functions Of Pineal Gland This gland secretes the hormone melatonin which regulates the circadian rhythm of the body and also certain reproductive hormones. The secretion of this hormone depends upon the amount of light a person is exposed to. This hormone is produced in large amounts when it is dark.

Detailed explanation-4: -The pineal gland receives adrenergic innervation, which activates a cascade of circadian events that leads to the nightly formation of melatonin from serotonin. Serotonin is present at high levels in the pineal gland during the day and increases further at night in the absence of melatonin formation (Sun et al., 2002).

Detailed explanation-5: -The pineal gland secretes melatonin which is a hormone derived from tryptophan that plays a central role in the regulation of circadian rhythm of the body. This circadian rhythm is the roughly 24-hour cycle of biological activities associated with natural periods of light and darkness.