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NPTE Neurological Practice Test

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Which reflex may be normally absent in some individuals?
Correct Answer:
Plantar grasp
Explanation:
Primarily, this is about infantile reflexes and how they change with development. The plantar grasp reflex is triggered by touching the sole, causing toe flexion. It is present at birth but should fade as the nervous system matures, typically integrating by about one year. Because its persistence is not needed for mature function, some individuals may show little to no plantar-grasp response later on, and that absence can be considered normal in those individuals. In contrast, the gag reflex, rooting reflex, and Moro reflex are more consistently tied to protective or essential feeding functions in infancy, and their absence or abnormal persistence is less likely to be considered normal variation.

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