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Involuntary stereotypic motor response to a specific stimulus.
Reflex
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- Reflex that apperas during gestation or at birth and becomes integrated by about six months of age.
- Neural circuit is at the spinal cord or brain stem level.
Primitive reflex
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A reflex that aides the infant in extending the arm and hand to contact the support surface and contributes to eye-hand coordination.
ATNR - Assymetrical tonic neck reflex
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A reflex that gives the infant the first experience of moving the arms away from the body and expanding the lungs.
Moro reflex
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- Postural responses that begin to appear in infancy or childhood as a child develops balance in various positions.
- These remain throughout life.
Reactions
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- Help keep the head oriented in relation to the body.
- Adjusts body part to vertical.
Righting reactions
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- Body's accomodation to changes in the center of gravity.
- Reactions seen in the head, trunk, and extremities.
- Allows function in upright position with hands free and develops into mature weight shifts.
Equilibrium reactions
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- Allow the infant to use the extremities to protect from falls by weight bearing on them.
- Will develop with child in prone, supine, sitting, and standing as the child gains these postures.
Protective reactions
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- Touch the cheek
- Turning head to same side with mouth open
- 28 weeks gestation to 3 months
Rooting reflex
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- Place finger in infants mouth
- Strong rhythmical sucking movements
- 28 weeks gestation to 3 months
Sucking reflex
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- Head dropping into extension suddenly
- Arms abduct with fingers open, then cross the trunk into adduction; cry
- 28 weeks gestation to 5 months
Moro reflex
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- Pressure in palm, ulnar side
- Flexion of fingers with firm grip
- birth to 4 months
Palmar grasp reflex
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- Pressure to base of toes
- Toe flexion
- 28 weeks gestation to 9 months
Plantar grasp reflex
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- Weight placed on balls of feet when upright
- stiffening of legs and trunk into extension
- 35 weeks gestation to 2 months
Positive support reflex
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- Supported upright with soles of feet on firm surface
- Reciprocal flexion/extension of legs
- 38 weeks gestation to 2 months
Walking (stepping) reflex
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- Head turned to one side
- Arm/leg on face side extended
- Birth to 6 months
ATNR - Assymetrical tonic neck reflex
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- Position of labyrinth in inner ear - reflected in head position
- Head toward supine results in body and extremities extended; head toward prone results in body and extremities flexed
- Birth to 6 months
Tonic labyrinthine reflex
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- Head position as stimulated by movement of neck
- Neck flexes, arms flex and legs extend; neck extends and legs flex
- 6 - 8 months
STNR - Symmetrical tonic neck reflex
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- Supine with head in mid-position and legs extended - stimulate sole
- Uncontrolled flexion of stimulated leg
- Birth to 2 months
Flexor withdrawal reflex
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- Supine with head in mid-postion and one leg extended, opposite leg flexed - stimulated sole of flexed leg
- Uncontrolled extension of stimulated leg
- Birth to 28 months
Extensor thrust reflex
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- Supine with head in mid-position, one leg flexed and opposite leg extended - flex extended leg
- Opposite leg will extend
- Birth to 2 months
Crossed extension reflex
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