Lecture 12 - Adolescent biological development 2011_student_slides

Lecture 12 - Adolescent biological development 2011_student_slides

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Physical Development in Adolescence Lecture 12 March 7, 2011
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Overview Adolescence (puberty – ~18 yrs) – an introduction Puberty § Historical trends § Triggers of puberty § Effects of puberty Ø Body growth Ø Sexual maturation § Reactions to puberty Ø Body image Ø Dating and sex Adolescent brain development § Video Sleep § Video
Background image of page 2
Adolescence – an introduction A period of contradiction in terms of health Very low rates of serious medical conditions High rates of risky behaviors that lead to injury and  death § Driving § Drugs § Suicide Mental health conditions § Depression § Social anxiety § Eating disorders
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Puberty Puberty =the set of biological processes that  change the immature child into a sexually  mature person Not a single event.  Part of a gradual process Timing:  Girls:  10.5-15    Boys:  11.5-17 Timing of puberty is changing…
Background image of page 4
Puberty – the secular trend The decline in age for achieving puberty in developed countries. § In 1830, the average age of  menarche in Northern  Europe was over 17. § Today, the age has fallen to  under 13 Mainly due to better nutrition/health Adolescence/emerging adulthood are stretched over more of lifespan
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What triggers puberty? Two command centers  1. Adrenal Gland (starts 6-8 years; peaks in early 20s) § Adrenal androgens: growth of hair, skin changes, and  sexual desire 2. HPG Axis (~9/10 yrs) § Hypothalamic hormone causes the pituitary to secrete  its hormones, which in turn, triggers the gonads to  begin secreting their hormones. § Gonads Ø Testes – Produce testosterone Ø Ovaries – Produce estrogen Ø Testosterone and estrogen occur in both sexes
Background image of page 6
Factors that Contribute to Puberty Onset Genetics § Humans tend to reach puberty at the age their  parents did § Twin studies Ø Identical – 2.8 month diff; Fraternal – 12.0 month
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/13/2012 for the course PSYCH 250 taught by Professor Ward during the Winter '08 term at University of Michigan.

Page1 / 22

Lecture 12 - Adolescent biological development 2011_student_slides

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online