Publications by authors named "I Zion"

Since the brutal October 7, 2023 attacks on Israel, the encroachment of the battlefield into the daily lives of all Israelis has impacted both civilians and combatants in various ways. The development of post-traumatic stress reactions has far-reaching effects across numerous aspects of life. One of the lesser-discussed consequences is the onset of sexual dysfunction.

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  • * Normally, people use their eyesight to judge the size and weight of items so they can grab them just right, but kids who had cataract surgery didn't learn this skill as well despite seeing for years.
  • * We found that while these kids improved at understanding weights of objects, they really struggled with the grasping task, suggesting that using visual information is different for seeing and acting versus just seeing.
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  • To do well in reaching for things, our brains need to predict where they are and how to move our muscles to get them.
  • When things change, like if our muscles get tired or our vision gets messed up, our brains can quickly adjust to keep us on track.
  • A study showed that kids who couldn't see well early in life had trouble adjusting their movements after getting their sight restored, but over time, they got better at it, showing that even if you miss out on some experiences early on, you can still learn and improve later.
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Gaze understanding—a suggested precursor for understanding others’ intentions—requires recovery of gaze direction from the observed person's head and eye position. This challenging computation is naturally acquired at infancy without explicit external guidance, but can it be learned later if vision is extremely poor throughout early childhood? We addressed this question by studying gaze following in Ethiopian patients with early bilateral congenital cataracts diagnosed and treated by us only at late childhood. This sight restoration provided a unique opportunity to directly address basic issues on the roles of “nature” and “nurture” in development, as it caused a selective perturbation to the natural process, eliminating some gaze-direction cues while leaving others still available.

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Adult humans make effortless use of multisensory signals and typically integrate them in an optimal fashion. This remarkable ability takes many years for normally sighted children to develop. Would individuals born blind or with extremely low vision still be able to develop multisensory integration later in life when surgically treated for sight restoration? Late acquisition of such capability would be a vivid example of the brain's ability to retain high levels of plasticity.

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