
In Our Time The Brain
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May 8, 2008 Exploring the history of ideas about the brain from ancient times to the 17th century, including Hippocrates and Aristotle's views. The shift in perceptions of the brain's importance and functions over the centuries. The Renaissance fascination with the internal exploration of the human body. Thomas Willis's innovative techniques in brain anatomy mapping. Literary views on the brain in 16th-century literature. The evolving understanding of the brain and life in the 17th and 18th centuries. The mysteries of phrenology and brain research, including Paul Broca's language research.
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Ancient Heart-First Worldview
- Aristotle and Plato offered competing views: Plato split the soul across brain, heart, gut while Aristotle privileged the heart as the seat of life and sensation.
- Aristotle saw the brain as a cooling organ, explaining its apparent lack of blood and activity in dissections.
Alexandrian Dissections Shift Focus
- In Alexandria, Herophilus and Erasistratus performed early human and animal dissections and mapped nerves and brain structures.
- Their work suggested the brain, not the heart, played the key role in controlling the body.
Galen's Long Shadow
- Galen synthesized animal dissection into a medical model that dominated for over a millennium, allocating different soul functions to liver, heart, and brain.
- His errors, like the rete mirabile inferred from animals, persisted because theory shaped what anatomists expected to find.
