Practice Quiz

CNM Certified Nurse Midwife

Category - Newborn

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Which of the following statements about the tonic-clonic reflex is not accurate?
  1. Unlike other reflexes, the tonic-clonic reflex does not have a function.
  2. The movement is most evident in the arms.
  3. The arm and leg on the side to which the head turns extend, and the opposite arm and leg contract.
  4. It disappears on the 6th month of life.
Explanation
Answer: D. The tonic-clonic reflex disappears between the second and third month of life. It appears that tonic-clonic reflex does not have function. The movement is observed in the arms and lower extremities, but it is more evident in the arms. A newborn is demonstrating tonic-clonic reflex when the arm and leg on the side to which the head turns extend and the opposite arm and leg contract.
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