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Related Experiment Videos

Plantar response in infancy.

Ghanshyam D Kumhar1, Tarun Dua, Piyush Gupta

  • 1Department of Pediatrics, University College of Medical Sciences and GTB Hospital, Delhi, India.

European Journal of Paediatric Neurology : EJPN : Official Journal of the European Paediatric Neurology Society
|October 29, 2002
PubMed
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The plantar response in Indian infants is typically extensor until 6 months. After this age, a transition to a flexor response begins, with asymmetrical responses common during this developmental period.

Area of Science:

  • Neurology
  • Pediatrics
  • Developmental Biology

Background:

  • The plantar response is a key neurological reflex in infants.
  • Understanding its typical development is crucial for identifying neurological abnormalities.
  • Limited data exists on plantar response maturation in Indian children.

Purpose of the Study:

  • To characterize the normal plantar response in Indian infants aged 1-12 months.
  • To establish age-specific patterns of plantar response development.
  • To document the prevalence of extensor, flexor, and equivocal responses.

Main Methods:

  • A cross-sectional study of 1281 healthy Indian infants aged 1-12 months.
  • Plantar response elicited using the thumbnail drag method on both feet.

Related Experiment Videos

  • Responses graded as flexor, extensor, or equivocal; bilateral and asymmetrical responses analyzed.

    • Main Results:

    • Extensor plantar response predominated until 6 months of age.
    • Bilateral extensor responses decreased from 79.4% (1-3 months) to 31.1% (9-12 months).
    • Bilateral flexor responses increased from 0.3% (1-3 months) to 39.3% (9-12 months), with asymmetrical responses peaking at 40.3% (6-9 months).

    Conclusions:

    • Normal plantar response is predominantly extensor in early infancy.
    • The transition to a flexor response typically begins after 6 months.
    • Asymmetrical plantar responses are common during this developmental transition.