Santiago Ramón y Cajal (1852–1934)
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Santiago Ramon y Cajal was among Spain's greatest scientists. A century ago, his work laid the foundations for the field of modern neuroanatomy. In 1906 Ramon y Cajal shared the Nobel Prize with the Italian anatomist Camillo Golgi for the development of the revolutionary neuron theory, which näytä lisää established the neuron as the basic unit of the nervous system. Born in Petila de Aragon in rural northeastern Spain, Ramon y Cajal was a bright but restless child and a poor student. His father, a surgeon, apprenticed him to a barber and later to a carpenter because he showed little academic promise. Both of these apprenticeships were failures. Surprisingly, Ramon y Cajal was admitted to the medical school at the University of Zaragoza, graduating in 1873. Upon receiving his license to practice medicine, he went to Cuba and worked as an army surgeon. In 1875 Ramon y Cajal returned to Spain, married, and became a professor at the University of Zaragoza. There, he began his neuroanatomical research, which became his main interest. Soon after, he was promoted to the rank of Extraordinary Professor and then to the directorship of the University's Medical Museum. In 1887 he became Extraordinary Professor at the University of Barcelona. In the following year, he published his first significant work on the nervous system, an analysis of the structure and development of the cerebral cortex. In 1892 Ramon y Cajal accepted the position of chairman of the Department of Histology and Pathological Anatomy at the University of Madrid. In 1922 he formally retired from the University but continued to conduct research, teach, and write his final book, The World Seen at Eighty: Impressions of an Ateriosclerotic. (Bowker Author Biography) näytä vähemmän
Image credit: Autorretrato mirando un microscopio (Public domain)
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Tekijän teokset
Cajal on the Cerebral Cortex: An Annotated Translation of the Complete Writings (History of Neuroscience, No 1) (1988) 7 kappaletta
Obras literarias completas 7 kappaletta
Histology of the Nervous System of Man and Vertebrates (History of Neuroscience, No 6) (2 Volume Set) (1995) 6 kappaletta
Reglas y consejos sobre investigación científica: El hombre natural y el hombre artificial (2010) 4 kappaletta
Cajal's Degeneration and Regeneration of the Nervous System (History of Neuroscience) (1991) 3 kappaletta
Ramón y Cajal 3 kappaletta
Studies on the Cerebral Cortex 3 kappaletta
Páginas de mi vida 3 kappaletta
The Structure of Ammon's Horn 2 kappaletta
Charlas de café. Pensamientos, anécdotas y confidencias (Tierra Firme) (Spanish Edition) (2016) 2 kappaletta
The structure of Ammon's horn 1 kappale
Mi infancia y juventud 1 kappale
Santiago Ramón y Cajal. Os tónicos da vontade: Regras e consellos sobre investigación… (2019) 1 kappale
Reglas y consejos sobre investigación científica. El hombre natural y el hombre artificial. ( 2010 ) 1 kappale
A secreto agravio, secreta venganza 1 kappale
La casa maldita 1 kappale
Charlas de cafe 1 kappale
El fabricante de honradez 1 kappale
Studies on Vertebrae Neurogenesis 1 kappale
Studies on vertebrate neurogenesis 1 kappale
Histology 1 kappale
Studies on vertebrate neurogenesis 1 kappale
Neuron Theory or Reticular Theory? Objective Evidence of the Anatomical Unity of Nerve Cells 1 kappale
Los tónicos de la voluntad: Reglas y consejos sobre investigación científica (Gadir Ensayo y Biografía) (2016) 1 kappale
Neuron Theory or Reticular Theory, Objective Evidence of the Anatomical Unity of Nerve Cells 1 kappale
{Hombre artificial? 1 kappale
Studies on the diencephalon 1 kappale
Δοκίμια ψυχολογίας 1 kappale
Die Retina Der Wirbelthiere: Untersuchungen Mit Der Golgi-Cajal'schen Chromsilbermethode Und Der Ehrlich'schen… (2017) 1 kappale
Merkitty avainsanalla
Yleistieto
- Kanoninen nimi
- Cajal, Santiago Ramón y
- Syntymäaika
- 1852-05-01
- Kuolinaika
- 1934-10-17
- Sukupuoli
- male
- Kansalaisuus
- Spain
- Ammatit
- physician
professor - Palkinnot ja kunnianosoitukset
- Nobel Prize (Physiology or Medicine, 1906)
Jäseniä
Kirja-arvosteluja
Palkinnot
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Associated Authors
Tilastot
- Teokset
- 83
- Jäseniä
- 424
- Suosituimmuussija
- #57,554
- Arvio (tähdet)
- 3.9
- Kirja-arvosteluja
- 10
- ISBN:t
- 76
- Kielet
- 3
- Kuinka monen suosikki
- 1
Cajal grew up in a small, northern Spanish town, his father the local physician and surgeon. His interestests were not academic, he loved rambling through nature and drew obsessively. He later would combine these loves in his career. He wanted to be an artist but was thwarted in this ambition by his father who wanted him to become a doctor. After long, unhappy and rebellious experiences in school, Cajal settled down to medical studies after his father forced him to work for a year as a shoemakers assistant. His father was an expert dissector and togehter they stole bodies from cemeteries as father passed this art to son in preparation for his medical school exams. Cajal, an intensely visual lerner, was fascinated by these dissections and the expertise he developed in preparation for medical school along with his artistic skill were to become the foundation stones of his scientific career.
His first and last medical assignment was as an officer in the Spanish Medical Corps. He served in Cuba and between malaria and diptheria barely survived the experience. Sent home to recuperate, he resigned from the Army and determined that he would pursue a University Professorial career rather than medicine. His dissection skills and the diagrams he produced were the winning edges in the very difficult and highly competitive examinations through which he earned his first university appointment.
As is the case for most autobiographies, the early years described in My Childhood and Youth are most interesting for the clues they offer for the half-century of supreme achievement that followed. The Story of My Scientific Work begins with Cajal’s first professorship at Zaragosa. From the outset of his university career, Cajal established a small laboratory and worked obsessively dissessecting the nervous systems of creatures all across the animal spectrum. His workdays started early and typically extended until midnight: dissection, staining and slide prep, observing and drawing. One can picture him with his eye moving from the ocular of a small microscope to pen and paper as he observed and sketched, always looking for clues as to the relationship between structure and function.
He became a master at staining, using the stain created by his great rival Professor Golgi, and was able to see and beautifully record microstructures that eluded others. This was the foundation of his research. He started with various sensory organs (primarily the retina and olfactory system) and motor neurons, worked his way to the spinal cord and then ultimately the brain; he compared these structures at various points in embryonic, juvenile and adult development and he studied them in insects, fish, birds and mammals. He studied patologies and injuries to the nervous system and nerve regeneration. By the end of his career, his bibliography of articles listed at the end of the book ran almost twenty pages of very small print and his publications ranged from simple studies to thousand page reference texts with hundreds of different illustrations by his own hand, and all of this at a time when authorship meant that you actually did your own research and wrote your own paper! It’s awesome.
Cajal is rightfully considered the father of modern neuroscience because it was he who proposed and proved the theory of the neuron and how signal transduction worked as the cellular level. The brilliance of his drawings was matched by the brilliance of his analysis and writing. I was particularly blown away by a chapter in which he undertook to support his observations of a particular retinal structure (homolateral fibers) which others were unable to see due to inferior microscopic technique. With the use of spectacular diagrams that conveyed his point with stunning persuasiveness, he compared panaromic (e.g., fish) and binocular (e.g., mammal) vision through lenticular eyes, demonstrated how the optic chiasma was necessary to imprint the image correctly on the brain in both instances and how the homolateral fibers were necessary to produce stereoscopic vision. I found it stunning that Cajal had the ability to marshall this explanation in support of his observations when the pedestrian scientific response would have been along the lines of “you need to produce a better section, practice your staining technique and look more carefully.” The reader senses the pleasure Cajal must have derived from this achievement.
And the drawings! A few years ago, I visited an exhibition of Cajal’s drawings in New York. They are so intricately beautiful, so full of the sense of beauty and awe that must have filled Cajal as he drew them. I think that Cajal’s love of art drove him in his work, gave him the pleasure to push so hard for so many years. He alludes at one point to the peace he derived from observing and drawing in his lab late at night following the death of one of his children. And although he writes very little about his personal life in the second part of the autobiography, there is a touching aside when he describes a book on color photography that he edited to help establish a sickly son in the book business but which he had to complete as author following his son’s death. “But why dwell on sadness?”
The writing is brilliant, ranging from the transcendant to the almost ludicrously esoteric. Here are examples of each:
“As the reader will remember, my devotion to the retina is ancient history. The subject always fascinated me because, to my idea, life never succeeded in constructing a machine so subtly devised and so perfectly adapted to an end as the visual apparatus. It is one of the rare cases, nevertheless, in which nature has deigned to employ physical means which are accessible to our present knowledge. I must not conceal that in my study of this membrane I for the first tinme felt my faith in Darwinism weakened, being amazed and confounded by the supreme constructive ingenuity revealed not only in the retina and in the dioptric apparatus of the vertebrates but even in the meanest insect eye. There, in fine, I felt more profoundly than in any other subject of study the shuddering sensation of the unfathomable mystery of life.” (Cajal goes on to lay out a number of instances in which he finds that it impossible to explain various anatomical arrangements “by the principles of gradual variation and selection of useful modifications.” Not surprisingly, many have used these observations to “disprove” natural selection, although it is clear from Cajal’s writings that he intended no such thing.)
On the esoteric and snarky side of the ledger: “As for S., the fiery naturalist of Klausenburg waited until 1907 [the year Cajal was awarded the Nobel prize] to feel himself aggrieved by the friendly objections which, in passing, his highly extravagant lucubration concerning the continuity of the neurofibrils in worms had suggested to me in 1903.”
Although he began in obscurity and at a disadvantage because of the low esteem for the Spanish scientific establishment, Cajal’s work was promoted by a renowned German colleague and by mid-career accolades and prizes (including the Nobel Prize for Medicine and Physiology) began to be heaped upon him. Cajal found himself at the apex of Spanish science at the University of Madrid. He was ambitious but driven mostly by idealism and the pursuit of knowledge for its own sake and for the betterment of humanity. He made decisive contributions to educational reform, establishment of a powerful “school” of Spanish neurobioloy and creation of a respected Spanish scientific establishment. He graciously acknowledged the honors and shouldered his many responsibilities, but really wanted to stay in the lab and continue his researches which he did up until his death at 82.
Cajal’s name belongs alongside Einstein, Darwin and Pasteur as one of the greatest scientists of this golden era of science.… (lisätietoja)