Which of the following reflexes is not present at birth –

NEET PG Pediatrics
#1

Which of the following reflexes is not present at birth –

    1. Asymmetric Tonic Neck Reflex
    1. Moro’s Reflex
    1. Symmetric tonic neck reflex
    1. Crossed extensor reflex

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EXP:

Neonatal reflexes

  • A number of primitive neonatal reflexes can be elicited in healthy term neonate.

  • These disappear as the child grows → These reflexes are inhibited by frontal lobes as child grows.

  • Absence of reflex responses indicates dysfunction of central or peripheral motor function.

  • Abnormal persistence of neonatal reflexes is pathognomonic of central motor lesions.

Reflexes are

A. Reflexes present at birth

  1. Rooting, sucking & swallowing reflexes
  2. Moro reflex
  3. Palmar grasp (grasp reflex)
  4. Crossed extensor
  5. Assymmetric tonic neck reflex

B. Reflexes appear after birth

  1. Symmetric tonic neck - appears at 4-6 months
  2. Parachute reflex - appears at 8-9 months
  3. Landau reflex - appears at 10 months

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