Developmental Reflexes Flashcards
tonic labryinthine reflex
in supine, extensor tone dominates
in prone, flexion tone dominates
when in the TLR typically seen
0-6 months
what happens if the TLR is too strong or persists
child will not be able to lift head in prone or bring hands to mouth in supine
Asymmetric tonic neck reflex (ATNR)
when turning head to right, right side extends and left flexes
when is ATNR typically seen
0-6 months
what happens if ATNR is too strong or persists
- difficult for child to bring hands to midline in supine and look at/grasp objects
- if continuous can lead to scoliosis, hip subluxation/dislocation
symmetric tonic neck reflex (STNR)
- when flexion child’s head, UE flex and LE extend
- when extending child’s head, UE extends and LE flex
when is STNR seen
4-6 months - 10-12 months
the STNR can HELP a child do this
push into quadraped, pull to stand, “bunny hop” on floor
if the STNR is too strong or persists, what happens
- child will have difficulty moving trunk separately from head
- does not allow for creeping
when is flexor withdrawal typically seen
28 weeks gestation to 1-2 months
what happens if flexor withdrawal reflex is too strong
child will have difficulty WB
moro reflex
when there is a sudden loss of support (head/upper body) the child with abduct then adduct UE and cry
when is moro reflex typically seen
28-32 weeks gestation to 3-6 months
what happens if moro reflex is too strong or persists
child will have difficulty with sustained control/coordination of UE
palmar grasp reflex
when stroke/pressure is applied to palm of hand finger flex and hand closes into fist
when is palmar grasp typically seen
birth to 5-6 months
what happens if palmar grasp reflex is too strong or persists
child will have difficulty opening hand to release objects
plantar grasp reflex
when pressure is applied to plantar surface of foot just proximal to toes the toes flex
when is plantar grasp reflex typically seen
birth to 9-12 months
what happens if plantar grasp reflex is too strong or persists
child will have difficulty relaxing toes for upright WB
positive support reaction
when held in an upright position with feet on a firm surface, the LE flexors and extensors contract tot support body (bouncing)
when is positive support reaction typically seen
6-9 months - life
*need this for postural control
landeau reaction
when a child is held horizontally in prone the head, back, and neck extends
when is landau reaction typically seen
3-4 months to 12-24 months
what does the landau reaction do
encourages/promotes extension
three balance response reactions (in order of development)
1 - righting reactions
2 - equilibrium reactions
3 - protective reactions
righting reaction
tendency to “right” oneself back to environment when slowly tilted slightly off balance
equilibrium reaction
when tilted slowly to sides or ant/post trunk will curve to ttry to couteract fall/LOB
protective reaction
when displaced quickly, will extend appropriate extremities to catch oneself
