Development & Growth Flashcards
Birth length doubles by _____ and triples by _____
doubles at 4yoa; triples at 13yoa
Average child grows _____ in first year of life.
____ in the second
____ in the third
and _____ thereafter until puberty
10 inches (25cm)
5 inches (12.5cm)
3-4 inches (7.5 to 10cm)
2-3 inches per year after that until puberty (5-7.5cm)
Within first few days of life, newborn’s weight changes how?
10% of weight lost.
Birth weight doubles by \_\_\_\_\_ triples by \_\_\_\_\_ Quadruples by \_\_\_\_\_ Between ages 2-9, weight increases by \_\_\_\_ per year
doubles by 4-5 months
triples by end of first year
quadruples by end of 2nd year
between 2-9yoa, +5lb (2.25kg) per year
At birth, the newborn head is ______ its total mature size whereas the rest of the body is _____ of its adult size
2/3 - 3/4
1/4
How many fontanelles are present at birth?
which ones?
6
anterior, posterior, 2 sphenoid, 2 mastoid
Anterior fontanelle closes by _____
posterior fontanelle closes by _____
10-14 months (can close by 3 and remain open until 18) 4 months (but may not be palpable at birth)
At birth, the average full-term infant has ____ ossification centers
which are?
five
distal end of the femur proximal end of tibia calcaneus talus cuboid
The ____ is the first bone to ossify in utero beginning when?
clavicle - during 5th fetal week.
Greatest changes in bone mass occur in girls at age _____ and boys at age _____
girls 12-15 years (slows significantly between 16-18)
boys 14-17 years (slows between 17-20)
Peak bone mass is reached in both sexes at ____ age
25-35 yoa
In neonates and infants, motor behavior is influenced by:
primitive reflexes as a result of immature CNS
During first 6-8 months, CNS matures, and primitive reflexes are suppressed.
_____ are the earliest markers of abnormal neurological maturation
obligatory or persistent primitive reflexes
Physiologic postural reflex responses Reflex: Head righting Stimulus: Response: Age of Emergence: Clinical Significance:
Physiologic postural reflex responses
Reflex: head righting
Stimulus: visual & vestibular
Response: align face/head vertical, mouth horizontal
Age of Emergence: Prone 2 months, Supine 3-4 months
Clinical Significance: delays or absent in CNS immaturity or damage
Physiologic postural reflex responses Reflex: Head and body righting Stimulus: Response: Age of Emergence: Clinical Significance:
Physiologic postural reflex responses
Reflex: head and body righting
Stimulus: tactile, vestibular, proprioceptive
Response: align body parts in anatomic position relative to each other and gravity
Age of Emergence: 46 months (nearly 4yoa)
Clinical Significance: delays or absent in CNS immaturity or damage
Physiologic postural reflex responses Reflex: Protective extension tone or parachute reactions Stimulus: Response: Age of Emergence: Clinical Significance:
Physiologic postural reflex responses
Reflex:
Stimulus: displacement of COG outside supporting base in sitting, standing
Response: extension/abduction of lateral extremity toward displacement to prevent falling
Age of Emergence:
- sitting anterior: 5-7 months
- lateral 6-8 months
- posterior 7-8 months
- standing: 12-14 months
Clinical Significance: delays or absent in CNS immaturity or damage
Physiologic postural reflex responses Reflex: equilibrium or tilting reactions Stimulus: Response: Age of Emergence: Clinical Significance:
Physiologic postural reflex responses Reflex: Stimulus: displacement of COG Response: adjustment of tone and posture of trunk to maintain balance Age of Emergence: - sitting: 6-8 months - standing: 12-14 months Clinical Significance: delays or absent in CNS immaturity or damage
Developmental milestones can be grouped into 4 distinct areas of function:
- gross motor behavior
- fine motor, adaptive behavior
- language behavior
- personal-social behavior
As a newborn, name the 4 gross motor milestones met
- flexor tone predominates
- in prone, turns head to side
- automatic reflex walking
- rounded spine when held sitting
As a newborn, name the 3 fine motor milestones met
- hands fisted
- grasp reflex
- state dependent ability to fix and follow a bright object
As a newborn, name the 1 personal/social milestone met
habituation and some control of state
As a newborn, name the 2 speech/language milestones met
- cry
2. state-dependent quieting and head turning to rattle or voice
As a newborn, name the cognitive state
- sensorimotor (0-24)
2. reflex stage
At 4 months, name the 4 gross motor milestones met
- head midline
- head held when pulled to sit
- in prone position, lifts head to ninety degrees and lifts chest slightly
- turns to supine
at 4 months, name the 4 fine motor milestones met
- hands mostly open
- midline hand play
- crude palmar grasp
- fascinated by own face in mirror
at 4 months, name the personal/social milestone met
recognizes bottle
at 4 months, name the speech/language milestones met (4)
- turns to voice and bell consistently
- laughs/squeals
- responsive vocalization
- blows bubbles, “raspberries”
at what month does a circular reaction develop - the interesting result of an action motivates its repetition
4 months