Exam 5: Physical and Motor Development in Infancy
Development proceeds cephalocaudally and proximodistally. Give an example for each and explain the developmental implications of these patterns.
Systems and skills do not all develop at the same time, but at different times depending on their position on the body.
Cephalocaudally - from "head to tail"; structures and functions on the head (e.g., vision) mature earlier than those far from the head (e.g., legs and locomotion).
Proximodistally - from center of body outwards, e.g., muscles of neck or torso develop before muscles of the fingers.
Following these directionality patterns, more vital and critical systems for survival develop first whereas less vital system develop later.
For example, brain and head develop before extremities. Muscles close to spinal cord develop before distal muscles controlling limbs.
Which statement is true about young infants with congenital cataracts?
B
Besides observing behavior, name at least two other measures that can be recorded/obtained from a child to measure development (such as CNS integrity or regulatory function).
Function of the regulatory system can be assessed by measuring heart rate or changes in heart rate (respiratory sinus arrhythmia). CNS integrity and functional brain activity can be measured from the scalp using electroencephalography (EEG) or event related potentials (ERP)
EEG activity measured from the brain shows the following patterns of development from neonates to age 2 years.
What neurological changes were evident in rats housed in complex (enriched) environments?
Dr Yin studies the onset and development of locomotion using parent diaries. In her data, she discovers a wide spread of ages for locomotion onset, ranging from 10 months to 18 months, with most children starting to walk at 14 months of age. What does this suggest about development of locomotion?
Dr Smith wants to study the relation between motor development and psychological growth. Her measure of psychological growth is a standardized language assessment administered during a lab visit. How could Dr Smith assess motor development?
The Bayley Scales of Infant Development show normative monthly motor accomplishments. According to this scale, infants develop the skill to "rotate trunk while sitting alone" at age 7 months but the skill "uses pads of fingertips to grasp pencil" at age 16 months. This is an example of:
The fact that development in one domain (e.g., brain development) proceeds faster than development in another domain (e.g., secondary sexual characteristics) is an example of:
Both hearing and deaf babies begin to babble in the middle of the first year. However, deaf babies eventually stop babbling while hearing babies continue. This is an example of:
Give an example and explain how motor development can affect psychological development.
Respiratory sinus arrhythmia (RSA) can be assessed via electrocardiograms as a measure for
A parent asks you whether giving her child swim lessons starting at age 4 months is better than starting at age 16 months. Your response is:
The development of locomotion is a statistically normal distributed behavior in infants. On a standardized test, Dr Jones observes a child whose locomotor skills are 2 standard deviations below the estimated population mean for this skill. What should Dr Jones tell the parents of the child?
What do individual differences between different people tell us about the processes that guide physical and motor development?
In what ways is the brain plastic? Describe two forms of brain plasticity
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