Wednesday, June 28, 2017
Tuesday, June 27, 2017
Galen of Pergamon
Aelius Galenus or Claudius
Galenus ( Greek: Κλαύδιος Γαληνός; September 129 AD – c. 200/c. 216),
and better known as Galen of Pergamon was a prominent Greek
physician, surgeon and philosopher in the Roman Empire. Arguably
the most accomplished of all medical researchers of antiquity,
Galen influenced the development of various scientific disciplines, including anatomy, physiology,
pathology, pharmacology, and neurology, as well as philosophy and
logic.
Galen's understanding of anatomy
and medicine was principally influenced by the then-current theory of humorism (also
known as the four humors – black bile, yellow bile, blood, and phlegm), as
advanced by ancient Greek physicians such as Hippocrates. His theories
dominated and influenced Western medical science for more than 1,300
years. His anatomical reports,
based mainly on dissection of monkeys, especially the Barbary macaque, and pigs, remained uncontested
until 1543, when printed descriptions and illustrations of human dissections
were published in the seminal work De humani corporis fabrica by Andreas
Vesalius where Galen's physiological theory was accommodated to these new
observations. Galen's theory of the physiology of the circulatory
system endured until 1628, when William Harvey published his treatise entitled De
motu cordis, in which he established that blood circulates, with the heart acting
as a pump. Medical students continued to study Galen's writings
until well into the 19th century.
…Galen's influence was so great that when dissections discovered
anomalies compared with Galen's anatomy, the physicians often tried to fit
these into the Galenic system. An example of this is Mondino de Liuzzi,
who describes rudimentary blood circulation in his writings but still asserts
that the left ventricle should contain air. Some cited these changes as proof
that human anatomy had changed since the time of Galen…
Monday, June 26, 2017
Friday, June 23, 2017
Epimenides paradox
Epimenides of Knossos (Crete) was a semi-mythical 7th
or 6th century BC Greek seer and philosopher-poet.
While tending his father's sheep, Epimenides is said to have
fallen asleep for fifty-seven years in a Cretan cave sacred to Zeus, after
which he reportedly awoke with the gift of prophecy (Diogenes Laërtius i.
109–115). Plutarch writes that Epimenides purified Athens after
the pollution brought by the Alcmeonidae, and that the seer's expertise in sacrifices and
reform of funeral practices were of great help to Solon in his reform
of the Athenian state. The only reward he would accept was a branch of the
sacred olive, and a promise of perpetual friendship between Athens and Knossus (Plutarch, Life
of Solon, 12; Aristotle, Ath. Pol. 1).
Paradox
Epimenides
was a 6th-century BC philosopher and religious prophet who, against the general
sentiment of Crete , proposed that Zeus was
immortal, as in the following poem:
They fashioned a tomb for thee, O holy and high oneThe Cretans, always liars, evil beasts, idle bellies!But thou art not dead: thou livest and abidest forever,For in thee we live and move and have our being. (Epimenides, Cretica)
Epimenides paradox is as follows: "Epimenides the Cretan says, 'that all the Cretans are liars,' but Epimenides is himself a Cretan; therefore he is himself a liar. But if he be a liar, what he says is untrue, and consequently the Cretans are veracious; but Epimenides is a Cretan, and therefore what he says is true; saying the Cretans are liars, Epimenides is himself a liar, and what he says is untrue. Thus we may go on alternately proving that Epimenides and the Cretans are truthful and untruthful.
Subscribe to:
Posts (Atom)