TABULA · CLASSROOM PACK

Galen vs Vesalius

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Edition 360f2c85 · generated from Tabula content · 3 plates

Fits: Any history of medicine unit

Licence: photocopiable for classroom use by the purchaser (single teacher), or across one school with a school licence.

TAB. VI · c. 160s–190s
The body as known in c. 160s–190s. Colour what was understood; outline what was only described.
TAB. XI · 1543
The body as known in 1543. Colour what was understood; outline what was only described.

Story cards

Tab. VI: Arteries carry blood (c. 160s–190s)

Tie off an artery at both ends, cut it, and look inside.

How they knew: A ligature experiment on living animals. Isolate a stretch of artery between two ties, then open it.

What it overturned: The Erasistratean view that arteries carry air-like pneuma, and that blood appears in them only when they are wounded.

Status: established

Tab. VII: The squealing pig falls silent (c. 160s–190s)

Before an audience in Rome, Galen cuts one nerve and a pig loses its voice.

How they knew: Public vivisection of a pig. Cut or tie the nerve, and listen.

What it overturned: The view that the voice is produced or controlled by the heart rather than by the brain through nerves.

Status: established

Tab. XI: Galen dissected apes (1543)

Vesalius shows that much of the anatomy everyone learned came from animals.

How they knew: Systematic human dissection, done by the professor himself, and recorded in large, exact woodcuts.

What it overturned: Several of Galen's statements about the human body, including the two-part lower jaw and the rete mirabile at the base of the brain, which came from animal anatomy.

Status: established

Spot the myth

For each statement, decide: was it believed then, later overturned, or is it supported by the sources?

  1. Followers of Erasistratus held that the arteries carry an air-like pneuma, and that blood appears in a cut artery only because it rushes in from the veins.
  2. A network of vessels at the base of the brain, the rete mirabile, refines vital spirit into animal spirit.
  3. The human lower jaw is made of two bones joined at the chin.
  4. Galen argued in a dedicated treatise that the arteries naturally contain blood, against Erasistratus and his followers.
  5. Galen described the nerve that descends from the brain, loops back up and reaches the larynx, and demonstrated before an audience in Rome that cutting it silenced a squealing pig.
  6. Vesalius published De humani corporis fabrica in Basel in 1543, illustrated with large woodcuts.

Discussion questions

  1. Galen of Pergamon: what method did they use, and why did it convince (or fail to convince) people at the time?
  2. What did people believe before Tab. VI, and why was that belief reasonable then?
  3. Galen of Pergamon: what method did they use, and why did it convince (or fail to convince) people at the time?
  4. What did people believe before Tab. VII, and why was that belief reasonable then?
  5. Andreas Vesalius: what method did they use, and why did it convince (or fail to convince) people at the time?
  6. What did people believe before Tab. XI, and why was that belief reasonable then?

Answer key and sources

  1. believed then, later overturned [arteries-pneuma#b]
  2. believed then, later overturned [rete-mirabile#b]
  3. believed then, later overturned [two-part-mandible#b]
  4. supported by the sources [galen-arteries-blood#c1]
  5. supported by the sources [galen-recurrent-laryngeal#c1]
  6. supported by the sources [vesalius-fabrica#c1]

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