Which type of OKN may be absent in infants due to underdeveloped cortical regions of the brain?

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Multiple Choice

Which type of OKN may be absent in infants due to underdeveloped cortical regions of the brain?

Explanation:
OKN depends on both brainstem reflexes and higher cortical processing for motion. In infants, the cortical areas that help interpret motion and bias the OKN toward certain directions are not fully mature yet. The nasal-to-temporal direction relies more on these cortical inputs, so it may be absent when cortical regions are underdeveloped. The temporal-to-nasal direction, on the other hand, is driven more by subcortical brainstem circuits and tends to be present earlier. Therefore, in infancy, the nasal-to-temporal OKN can be absent while the temporal-to-nasal OKN remains detectable.

OKN depends on both brainstem reflexes and higher cortical processing for motion. In infants, the cortical areas that help interpret motion and bias the OKN toward certain directions are not fully mature yet. The nasal-to-temporal direction relies more on these cortical inputs, so it may be absent when cortical regions are underdeveloped. The temporal-to-nasal direction, on the other hand, is driven more by subcortical brainstem circuits and tends to be present earlier. Therefore, in infancy, the nasal-to-temporal OKN can be absent while the temporal-to-nasal OKN remains detectable.

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