I don’t know how anyone counts neurones, but even vertebrates have lots of them outside the brain. We have the huge junction of nerves called the caeliac (or solar) plexus, as well as cervical, brachial, bronchial, cardiac, coronary, gastric, sacral, choroid, lumbar, venous, pelvic and vesicle plexuses (or is it plexi?!)
Add to that all the other areas where our nerves are bundled together to form the spinal column, ganglia, and all nerve junctions, internal body sensors and external receptors. It has to add up to a huge number of neurones. Has anyone counted up the ratio of all of these to the number of neurones in our human brain? I would be interested to know.
Vis233 t1_jd4j03v wrote
Reply to Animals with more neurons outside the brain than inside? by placidbeans
I don’t know how anyone counts neurones, but even vertebrates have lots of them outside the brain. We have the huge junction of nerves called the caeliac (or solar) plexus, as well as cervical, brachial, bronchial, cardiac, coronary, gastric, sacral, choroid, lumbar, venous, pelvic and vesicle plexuses (or is it plexi?!)
Add to that all the other areas where our nerves are bundled together to form the spinal column, ganglia, and all nerve junctions, internal body sensors and external receptors. It has to add up to a huge number of neurones. Has anyone counted up the ratio of all of these to the number of neurones in our human brain? I would be interested to know.