Science and Technology

The brains of humans and squids develop the same way

Scientists from Harvard University have concluded that the brains of humans and squids have advanced in the same way. The discovery got here as specialists checked out nerve cells that linked in the eyes of rising cephalopods. Learning was revealed in November 2022 in North American journal Current Biology.

With high-resolution cameras targeted on the retina of longfin squid embryos (Doryteuthis pealeii), the researchers word that the fundamental sample of how advanced brains and programs develop, regardless of 500 million years of divergent evolution, could also be the same throughout species.

Longfin squid embryos in superior improvement | Photo: Playback/Kristen Koenig/Live Science

Cephalopod brains are ‘fascinating’

The intelligence of cephalopods, a category of marine animals that features octopuses, squids and cuttlefish, is a topic of nice curiosity amongst biologists.

Check out some “fascinating” traits of cephalopods:

  • they’ve a outstanding reminiscence, in contrast to most invertebrates;
  • they’re “masters” of camouflage;
  • react with curiosity, boredom, or playful mischief to their environment;
  • they will dream, as evidenced by the shade waves that sparkle throughout their pores and skin as they sleep.

According to the research’s lead creator, Kristen Koenig, a molecular biologist at Harvard University, the findings “are shocking as a result of a lot of what we find out about nervous system improvement in vertebrates has lengthy been considered lineage-specific.”

Research process

To research the growing brains of embryos, the researchers used fluorescent dyes to mark a particular sort of stem cell referred to as neural progenitor cells, earlier than finding out how they developed with common ten-minute snapshots taken by microscopic cameras. The cameras examined the retina, residence to almost two-thirds of the squid’s nervous tissue.

Retinas of analyzed squid | Photo: Playback/Kristen Koenig/Live Science

As in vertebrates, the researchers noticed squid progenitor cells organizing into pseudostratified epithelium, a protracted, tightly packed construction that kinds as a vital step in the development of massive, advanced tissues.

According to the scientists, the construction’s core measurement, group and motion are “comparable” to the neural epithelium in vertebrates, one thing that was as soon as considered a novel characteristic that allowed vertebrates to develop subtle brains and eyes.

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