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Navigation brain cells in retrosplenial cortex preserved across evolution (Level A1) — a mouse sitting on top of a wooden table

Navigation brain cells in retrosplenial cortex preserved across evolutionCEFR A1

5 Dec 2025

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Adapted from U. Michigan, Futurity • CC BY 4.0

Photo by Matthew Mejia, Unsplash

Level A1 – Beginner
2 min
69 words
  • Researchers find special brain cells in mice.
  • These cells help navigation and knowing location.
  • They are in the retrosplenial cortex.
  • Darwin called the skill dead reckoning.
  • The cells act like a subconscious GPS.
  • There are two unique neuron types.
  • Both types are found in mice and rats.
  • One type is slightly larger in rats.
  • People with Alzheimer’s have trouble finding home.
  • Scientists now check human brains for these cells.

Difficult words

  • researcher — A person who studies and finds new facts.
    Researchers
  • navigation — The skill of moving and finding places.
  • retrosplenial cortex — A part of the brain near the back.
  • dead reckoning — A way to find location without maps.
  • subconscious — Mental activity that people do not notice.
  • neuron — A cell in the brain that sends signals.

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Do you use a GPS to find places?
  • Do you get lost in a new place?
  • Do you know someone who forgets the way home?

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