The First Sparks Of Thought Appear Long Before Experience

The idea that the brain begins its work long before the world touches it feels almost mystical, yet the evidence keeps arriving. Now a team led by UC Santa Cruz shows that human brain organoids produce structured electrical sequences with no sensory input at all, a finding that shifts how we think about the earliest steps toward thought. The work, published in Nature Neuroscience, probes a period of development normally sealed away inside the womb. Researchers grew tiny three dimensional models.