Post on 05-Apr-2018
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Infant Reflexes
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Importance of Infant
Reflexes
Reflexive movements occur during the last 4
months of prenatal life and the first 4 months
after birth Absence or persistence beyond a given time
frame signifies dysfunction of the CNS
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Infant vs. Lifespan
Reflexes
Most infant reflexes do not last beyond the
first year
Reflexes that endure are called lifespanreflexes
Knee-jerk reflex
Flexor-withdrawal reflex
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Role of the Reflexes in
Survival
Infant reflexes are called
primitive reflexes
Primitive reflexes are
repressed by 6 months of
age
Primitive reflexes are
important for
Protection
Nutrition
Sucking reflex
Rooting reflex
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Primitive Reflexes ~
Palmar Grasp
The palmar grasp reflex
is one of the most
noticeable reflexes to
emerge
When an object is placed
in the infant's hand and strokes their palm, the
fingers will close and they will grasp it Leads to voluntary reaching and grasping
May predict handedness in adulthood
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Primitive Reflexes ~
Sucking
Occurs pre-and
postnatally
Stimulated bytouching the lips
Helps child find
nourishment
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Primitive Reflexes ~
Rooting
Helps the baby locate
nourishment
Turn his head toward
anything that strokes his
cheek or mouth
Usually works in
conjunctions with suckingreflex
Stimulus ~ touching the cheek
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Primitive Reflexes ~
Asymmetric Tonic Neck
Reflex (Fencing Posture)
When the child's head
is turned to the side,
the arm on that side will
straighten and theopposite arm will bend
Facilitates the
development ofbilateral body
awareness
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Primitive Reflexes ~
Plantar Grasp
Plantar flexion of the
foot (toes move away
from the shin, and curl
down
The toes appear to be
grasping
Stimulus is touching theball of the foot
This reflex must
disappear before the
baby can stand or walk
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Primitive Reflexes ~
Parachute
suspending the child by
the trunk and by
suddenly producing
forward flexion as if thechild were to fall
spontaneously extends
the upper extremitiesas a protective
mechanism
appears before the
onset of walking
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Primitive Reflexes
Reflex Onset Fully Developed Duration
Palmar grasp 28 wk 32 wk 23 mo
Rooting 32 wk 36 wk Less prominent after 1 mo
Moro 2832 wk 37 wk 56 mo
Tonic neck 35 wk 1 mo 67 mo
Parachute 78 mo 1011 mo Remains throughoutlife