dev class notes 2

dev class notes 2 - Chapter 5 Infant Physical Development...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 5 28/04/2008 11:14:00 Infant Physical Development Biological Changes Perceptual-Motor Changes Size and Shape o Triple in weight (7 21 lbs) o Add 10 inches height o Change in Body Proportions Head is large – adult size – brain at birth is ¼ body, and ¼ adult weight. The rest of body is not. o Environmental Conditions Influence Growth Rate Babies born in Malawi face conditions such as widespread mal- nutrition, chronic poverty, disease, and a rising HIV/AIDS infection rate. As a result of this complicated array of factors, Malawian infants grow at a slower rate than their American counterparts. Bone, Muscles, and Gender o Bone ossification First in hand and wrist (pick up) – increases in muscle mass Increases in muscle mass Associated with ability to stand alone and walk o Sex differences Females are ahead 3 weeks prenatal, 6 weeks at birth, 2 years at puberty Girls get their permanent teeth, start puberty, and reach full size earlier than boy Brain Development o Exuberant synaptogenesis (3-12 months)
Background image of page 1

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

View Full Document Right Arrow Icon
Brain synapses are being over produced Density of synapses is double what it will be in early adolescence As a result of this overproduction of synapses, infants are prepared to establish neural connections for virtually any kind of experience “Synapses that are regularly used flourish and are strengthened, while those that go unused are gradually ‘pruned away’—that is, they atrophy and die off.” o 2.5 - 4 months: Surge in visual cortex o 3 month – social advances – smiling, etc… o 6 months: Spurt in motor cortex – start to crawl o 7 - 9 months: Rapid growth of frontal cortex (used in integrating information) – development in higher level cognitive abilities (0bvious demonstrations of cause and effect, etc), attachment behaviors become more obvious as well. o Prefrontal area plays a particularly important role in the development of voluntary behavior (e.g., impulse inhibition) o Proximodistal – motor development and eurcaudial – head down development Reaching and Grasping o Newborns – perceive an object moving before them and reach for it (visually initiated reaching) o 2.5 months – coordination of reach and grasp. Can do full hand grasp. o 5 months – no longer reach for an object beyond their grasp o 9 months – guide movements with a single glance Fine Motor Movements o Using fingers for things o 7 months – often still using whole hand grasp so not good with picking up small objects o 9 months – getting there, but still having trouble o 12 month – pincher grasp – oppose thumb and fore finger to pick things up Perceptual Motor Exploration
Background image of page 2
o Learning about world by throwing, banging, touching, squeezing, put everything in their mouths. Development of Locomotion
Background image of page 3

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

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 26

dev class notes 2 - Chapter 5 Infant Physical Development...

This preview shows document pages 1 - 4. Sign up to view the full document.

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