Q:

When are the axons of the corticospinal tracts fully myelinated?

waelhammad
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2022-11-10
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When are the axons of the corticospinal tracts fully myelinated?

  1. In the late embryonic period
  2. In the mid-fetal period
  3. At birth
  4. By the end of the first postnatal year
  5. By the end of the second postnatal year
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waelhammad
2022-11-10
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E. Axons of the corticospinal tracts are fully myelinated by the end of the second postnatal year; Babinski’s sign (extensor plantar reflex) is usually not elicitable before myelination of the corticospinal tracts.

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