Post on 14-Dec-2015
transcript
Renaissance BreakthroughsTheoretical Advances
The Birth of the Renaissance• Renaissance
– Rebirth– Revisit Classical ideas
• Want to copy Greek and Roman styles
– Fall of Byzantium, 1453• Classically trained scholars flee
Turks• Move to Italy
– Reconquest of Spain• Library of Cordoba
– Italian City States• Competition to outdo each
other
Improving on the Classical World
• New technologies / techniques available• Growing confidence• Re-examine Original Latin and Greek
Texts– Notice some errors / inconsistencies
• Attempt to improve on Classical techniques
• Inquisitive and experimental
How to re-examine the world
• Investigation– Columbus
• Hmmm, I wonder if I can prove the world is round?
• Observation– Copernicus
• The stars and planets are moving in the wrong direction if the earth is the centre of the Universe
• Experimentation– Galileo
• Hmmm, If I put these two lenses together in a tube, I wonder what will happen.
Renaissance Art• Observation
– Examine nature itself• How does nature
work? Studied plants, animals
– Experimentation• Anatomy
– Leonardo da Vinci– Dissected 10 bodies
Challenging Christianity
• The Reformation– Martin Luther 1517– Challenges Catholic Church and the
Pope– Copernicus
• Scientific contradiction of Christian teachings
– Can the Christian church’s judgement be trusted on medical matters?
Why does this breakthrough last?
• Printing Press– Gutenberg 1452
• Bible
– Very cheap and easy to spread ideas– Challenges Catholic Church’s control
over the spread of information• Monks handwritten manuscripts
Paracelsus1493 - 1541
• Full Name:– Aureolus Phillipus Theophrastus Bombastus von
Hohenheim
• University Lecturer in Basel, Switzerland• Challenged Galen
– Burnt Galen’s books in front of his students• “Galen is a liar and a fake; Avicenna is a kitchen master. They
are good for nothing. You will not need them. Reading never made a physician. Patients are the only books.”
– Disagreed with 4 Humour Theory• Put forward the idea that the body was attacked from outside
– Use minerals & magic to help protect the body» Mercury, Laudanum, iron and Sulphur
Padua Anatomical
Theatre• Padua in Italy• Premier Medical
Facility in Europe• More willing to
dissect cadavers• However, cadavers
still in short supply• Up to 300 observers• All observers within
10 metres of table
Andreas Vesalius1514 - 1564
• Studied in Paris• Observed gallows victims and
decaying bodies of criminals– Smuggled parts home
• Became professor of Padua at 23
• Conducted dissections himself– Students told to study the body
for themselves rather than rely on others.
• De Fabrica published in 1543– Pointed out Galen’s errors
• Jaw bone– Printing press allowed it to be
made available to a wide audience
Ambroise Pare1510 - 1590
• Surgical Advances• Barber-Surgeon in French Army• Advance One
– Problem• Surgeons cauterised gunshot
wounds with boiling oil (to stop lead poisoning)
– Painful– Shock– Infection
– Crisis• Ran out of oil
– Solution• Do not cauterise• Use natural ointment
– Used by Romans
Ambroise Pare1510 - 1590
• Advance Two– Problem
• Cauterisation used to stop bleeding on cut wounds / amputations
– Shock– Pain– Infection
– Solution• Ligatures
– Use silk thread and needles to sew up bleeding vessels
» Infection still a problem
• Question 1-4 page 87
William Harvey
1578 - 1657
• Student at Padua• Challenged Galen’s idea
of new blood being created– experiments to show that
blood flowed in one direction
• Animals• Cadavers
• Proved that heart was a pump– Blood recirculates– Calculated volume of blood
• Published results showing his proof
• Problem: Capillaries?• How useful was his
discovery?
• Page 90
• Use handout to help answer questions 1 to 5
Homework