PSY 2105 Lecture Notes - Lecture 4: Moro Reflex, Circadian Rhythm, Smoking And Pregnancy
13 May 2018
School
Department
Course
Professor
PSY2105A Dr. Isabelle Boutet
Chap 5 & 6 Physical Development 08.05.18
Chap 5 p 130-162; Chap 6 p 191-204
States and Behaviors of Newborns
Newborn – 0-6wks; Infant – 6wks-18mnths; Toddler – 18mnts-3yrs; preschooler – 3-5yrs; adolescent – 12-18yrs
• Most children gain ability to walk by 18mths, considered a great achievement b/c it's the toddler gaining
independence (ability to run away)
Sleep Cycles
• Deep sleep – 8-9 hrs; no activity except for occasional jerky movements
• Light sleep – 8-9 hrs; rapid eye movements are observed, smooth movements in sleep, may have irregular
breathing
o Newborns – 50% of sleep is REM sleep vs 20% in adults
• Drowsiness – 1.5-3 hrs; eyes may be open but with dull look, delayed response to stimulation
• Alert inactivity
• Alert activity
• Crying – 1-3hrs; intense crying that is difficult to stop, high level of motor activity
Neors do’t hae iradia rhyth estalished, thus they do’t sleep i the ight; they reah adult-like cycle
by 12 months
Sleep is important for healing, memory consolidation, brain development, high-level cognitive functions,
regulation of emotions
Impromptu Activity – should we teach children to sleep through the night? (research)
• Present both sides of the debate
o Baies do’t hae the alori apaity to sleep for ore tha 4 hrs
• Find info from reliable sources to find resolution to the debate and provide a take home message for
parents
Sudden Infant Death Syndrome (SIDS) – sudden, unexpected and unexplained death of an infant less than 1 yr
• Risk factors – position of sleeping, soft bedding, warmth, maternal smoking, bed sharing
• Physiological reason is not well understood – can be suffocating, can be not responding to waking
Newborn Reflexes
Reflexes: involuntary responses to external stimuli; believed to be rooted in evolution for survival
• Presee or asee proides iforatio aout the ay’s rai ad erous syste
• i.e blink – permanent to protect eyes from strong stimuli
• i.e Moro Reflex - newborns have the reflex to extend their arms to hang on to something, by 3 months the
moro reflex disappears
Congenitally Organized Behaviors: not elicited by a discrete identifiable stimulus, more adaptable
• i.e sucking – ay’s sukig patter has to adapt to the lactation flow and the milk consistency, as well as
their own respiratory rate; can react to a nipple, a hand, a cloth
o rhythm can vary greatly, not reflex b/c then the rate would always be the same
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Chap 5 p 130-162; chap 6 p 191-204. Newborn 0-6wks; infant 6wks-18mnths; toddler 18mnts-3yrs; preschooler 3-5yrs; adolescent 12-18yrs: most children gain ability to walk by 18mths, considered a great achievement b/c it"s the toddler gaining independence (ability to run away) Sleep cycles: deep sleep 8-9 hrs; no activity except for occasional jerky movements. Crying 1-3hrs; intense crying that is difficult to stop, high level of motor activity. Ne(cid:449)(cid:271)or(cid:374)s do(cid:374)"t ha(cid:448)e (cid:272)ir(cid:272)adia(cid:374) rhyth(cid:373) esta(cid:271)lished, thus they do(cid:374)"t sleep i(cid:374) the (cid:374)ight; they rea(cid:272)h adult-like cycle by 12 months. Sleep is important for healing, memory consolidation, brain development, high-level cognitive functions, regulation of emotions. Impromptu activity should we teach children to sleep through the night? (research) Present both sides of the debate: ba(cid:271)ies do(cid:374)"t ha(cid:448)e the (cid:272)alori(cid:272) (cid:272)apa(cid:272)ity to sleep for (cid:373)ore tha(cid:374) 4 hrs. Find info from reliable sources to find resolution to the debate and provide a take home message for parents.
