This paper reviews the changes of adolescence that affect neuroendocrine and neurophysiologic functions. Normal variability in onset and progression of pubertal stages is discussed. The effects of hypothalamic and pituitary maturation and resulting changes in circulating hormone levels at the onset of secondary sexual characteristics are reviewed. Several theories and research data regarding the causes of the onset of puberty are identified. Abnormal symptoms of pubertal development are reviewed, and suggestions made for the Cleft Palate-Craniofacial team to monitor these symptoms.
