Seasonal effect?Might your article, "Bright Lights, Big Cancer" (SN: 1/7/06, p. 8), on breast cancer have missed something? If the daily light-dark cycle affects melatonin melatonin: see pineal gland. melatonin Hormone secreted by the pineal gland of most vertebrates. It appears to be important in regulating sleeping cycles; more is produced at night, and test subjects injected with it become sleepy. , is there a seasonal change in cancer rates in the Northern (and Southern) Hemispheres? If so or not, that might give a clue to any latency period latency period n. In psychoanalytic theory, the fourth stage of psychosexual development, extending from about age 5 to puberty, when a child apparently represses sexual urges and prefers to associate with members of the same sex. . ALAN MACGREGOR Noun 1. MacGregor - Scottish clan leader and outlaw who was the subject of a 1817 novel by Sir Walter Scott (1671-1734) Rob Roy, Robert MacGregor , SALMON ARM, B.C. |
|
||||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion