Lindsey’s Reviews > Brain Facts: A Primer On The Brain And Nervous System > Status Update
Lindsey
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Restarting this because I’m gonna add random facts as I go.
a human brain contains roughly 86 billion nerve cells/neurons, and we use all of them
an estimated 1 in 4 people worldwide will face a neurological or psychiatric condition I wonder if that includes mild cases. At what point does anxiety count, etc? It’s a normal human emotion, but many are labeled as having a disorder. I have my doubts.
— Mar 03, 2026 05:54PM
a human brain contains roughly 86 billion nerve cells/neurons, and we use all of them
an estimated 1 in 4 people worldwide will face a neurological or psychiatric condition I wonder if that includes mild cases. At what point does anxiety count, etc? It’s a normal human emotion, but many are labeled as having a disorder. I have my doubts.
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Mar 03, 2026 06:05PM
sensory neurons create electrical signals (action potentials) which travel down a neuron. To get to a second neuron (crossing the gap aka synapse), the action potential is transformed into a chemical messenger which can trigger a second action potential etc etc., can also release a chemical messenger that blunts the transmission of a signal to end the message. (I wish the updates didn’t have a limit on the number of characters..dumb)
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