Cronología de la investigación sobre la dinámica cerebral de Justo Gonzalo / Chronology of Justo Gonzalo’s research on brain dynamics

Introducción: El neurocientífico español Justo Gonzalo y Rodríguez-Leal (1910-1986) investiga la organización funcional de la corteza cerebral durante más de cuatro décadas. Sus hallazgos le llevan a formular una teoría neurofisiológica basada en las leyes de la excitabilidad nerviosa, que denomina dinámica cerebral. En el presente trabajo se expone de forma cronológica cómo surgen las principales ideas sobre las que se articula.Desarrollo: En 1939 Gonzalo observa los denominados fenómenos de acción dinámica: desfasamiento, facilitación y repercusión cerebral. Le siguen dos principios: efecto cerebral de la lesión según la magnitud y posición (1941), y organización sensorial, según un desarrollo espiral (1947). Paralelamente, caracteriza lo que llama el síndrome central de la corteza cerebral. En la década de los cincuenta desarrolla los conceptos de gradiente cortical, similitud y alometría. En contraposición a las concepciones modulares de la corteza cerebral, en las que una región es responsable de una función, Gonzalo expresa que ‘los gradientes corticales dan la localización de los sistemas mientras la similitud y alometría revelan su trama funcional’.Conclusiones: La teoría de dinámica cerebral se articula en dos etapas. La primera (de 1938 a 1950) se caracteriza por una importante base clínica con observación de nuevos fenómenos y formulación de nuevos conceptos. La segunda (de 1950 a 1960) incluye la introducción de conceptos de mayor alcance, como el gradiente funcional cortical, y leyes de alometría que se basan en un cambio de escala. Actualmente, varios autores consideran que el concepto de gradiente es clave para entender la organización cerebral.(AU)

Introduction: The Spanish neuroscientist Justo Gonzalo y Rodríguez-Leal (1910-1986) investigated the functional organisation of the cerebral cortex over more than four decades. His findings led him to formulate a neurophysiological theory based on the laws of nervous excitability, which he called brain dynamics. This paper presents in chronological order how the main ideas on which it is based arose.Development: In 1939, Gonzalo observed the phenomena of dynamic action: asynchrony or disaggregation, facilitation and cerebral repercussion. This was followed by two principles: the cerebral effect of lesions according to their magnitude and position (1941), and spiral development of the sensory field (1947). At the same time, he characterised what he called the central syndrome of the cerebral cortex. In the 1950s he developed the concepts of the cortical gradient, similarity and allometry. In contrast to modular conceptions of the cerebral cortex, in which one region is responsible for one function, Gonzalo argued that ‘cortical gradients provide the location of systems, while similarity and allometry reveal their functional mechanism.’Conclusions: The theory of brain dynamics was established in two stages. The first (between 1938 and 1950) had an important clinical foundation, involving the observation of new phenomena and the formulation of new concepts. The second (between 1950 and 1960) included the introduction of more far-reaching concepts, such as the functional cortical gradient, and allometry laws based on a change of scale. Today, various authors believe that the concept of the gradient is crucial for understanding how the brain is organised.(AU)

The people behind the papers - J. Guillermo Sanchez and Jim Wells.

During development, the gastrointestinal tract undergoes patterning along its anterior-posterior axis to define regions with distinct organs and functions. A new paper in Development derives human intestinal organoids from an individual with duodenal defects and a compound heterozygous variant in the gene encoding the transcription factor RFX6. By studying these organoids, the authors identify novel roles for RFX6 in intestinal patterning. To learn more about the story behind the paper, we caught up with first author J. Guillermo Sanchez and corresponding author Jim Wells, an endowed professor in the Division of Developmental Biology at Cincinnati Children's Hospital, USA, where he is also the Director for Basic Research in the Division of Endocrinology.

The people behind the papers - Jason Ko and Daniel Lobo.

Planarians grow when they are fed and shrink during periods of starvation. However, it is unclear how they maintain appropriate body proportions as their size changes. A new paper in Development investigates the differences between growth and shrinkage dynamics and builds a mathematical model to explore the mechanisms underpinning these two processes. To learn more about the story behind the paper, we caught up with first author, Jason Ko, and corresponding author, Daniel Lobo, Associate Professor at the University of Maryland.

The people behind the papers - Margret Bülow and Pilar Carrera.

Bez is a Class B scavenger receptor in Drosophila that is yet to be characterised. In a new study, Margret Bülow and colleagues uncover a role for Bez in mobilising lipids from Drosophila adipocytes into the ovary for oocyte maturation. To find out more about the people behind the paper, we caught up with first author, Pilar Carrera, and corresponding author, Margret Bülow, Group Leader at the University of Bonn.

Australia II: A Case Study in Engineering Ethics.

Australia II became the first foreign yacht to win the America's Cup in 1983. The boat had a revolutionary wing keel and a better underwater hull form. In official documents, Ben Lexcen is credited with the design. He is also listed as the sole inventor of the wing keel in a patent application submitted on February 5, 1982. However, as reported in New York Times, Sydney Morning Herald, and Professional Boatbuilder, the wing keel was in fact designed by engineer Peter van Oossanen at the Netherlands Ship Model Basin in Wageningen, assisted by Dr. Joop Slooff at the National Aerospace Laboratory in Amsterdam. Based on telexes, letters, drawings, and other documents preserved in his personal archive, this paper presents van Oossanen's account of how the revolutionary wing keel was designed. This is followed by an ethical analysis by Martin Peterson, in which he applies the American NSPE and Dutch KIVI codes of ethics to the information provided by van Oossanen. The NSPE and KIVI codes give conflicting advice about the case, and it is not obvious which document is most relevant. This impasse is resolved by applying a method of applied ethics in which similarity-based reasoning is extended to cases that are not fully similar. The key idea, presented in Peterson's book The Ethics of Technology (Peterson, The ethics of technology: A geometric analysis of five moral principles, Oxford University Press, 2017), is to use moral paradigm cases as reference points for constructing a "moral map".

[From candle's light to neon's brightness. Analysis of the historical progression of the notion of transhumanism in its relation to transcendence]. / De la luz del cirio al brillo del neón. Análisis de la progresión histórica de la noción de transhumanismo en su relación con la trascendencia.

This study presents the most representative notions of the transhumanism concept in light of its temporal development, starting from the first time that there is a record of a similar conception, with the aim of drawing a common thread between all of them and elucidating the relationship that these may have. For this, the works of Dante, Julian Huxley, FM-2030, Max More, Nick Bostrom and Raymond Kurzweil will be reviewed. From this analysis it will be extracted that all these different conceptions of transhumanism are united by their search for transcendence in the human being and the longing for a future state of divinity; Likewise, they differ in the way these common elements are understood. Such common and divergent notions allow a deeper understanding of what transhumanism is and promote a new perspective to understand these cutting-edge ideas.

[THE UNIMAGINABLE CONNECTION BETWEEN JEWISH DOCTORS AND THE GERMAN MEDICAL TRAINING SYSTEM DURING THE NAZI REGIME].

INTRODUCTION: In his important article, Prof. G. Eshel describes the story of three Jewish physicians who returned to Nazi Germany to complete their MD thesis despite laws prohibiting Jewish students from German Universities. The three physicians completed their MD thesis examination with the help of three German Professors who supported them regardless of the laws banning Jewish students. The three physicians risked their lives by returning to Nazi Germany, as did the three professors who supported them. The three physicians returned to Palestine upon completion of the requirement for their medical licensing and continued to contribute to the medical system for many years in the State of Israel. The determination of the three Jewish physicians and their courage teaches us an important lesson on the motivation of young doctors to complete their education and practice medicine. The support of the German professors created some lights in the great darkness of the Nazi regime. Generations of physicians took a stand on non-medical issues and contributed to social justice and the wellbeing of individuals beyond medical care. We should all continue this legacy.

A history of the McGill Department of Surgery: the first 100 years (1923-2023).

SummaryIn 1923, just over 100 years ago, Edward William Archibald was appointed the first chair of surgery in McGill University's Faculty of Medicine. This milestone provides an opportunity to reflect on where the department has come from and how it has progressed to the present day. Although the size, breadth, and diversity of the department members have changed notably over the century, the core values of innovative clinical care, research, and education established a century ago continue to this day. To reflect his values, the Archibald Chair of Surgery was established in 1990 and is today held by the department chair.

[Alexander Grigoryevich Lyutkevich - a prominent figure in Russian ophthalmology and public health. (On the 155th anniversary of his birth)]. / Aleksandr Grigor'evich Lyutkevich ­ vidnyi deyatel' otechestvennoi oftal'mologii i zdravookhraneniya. (K 155-letiyu so dnya rozhdeniya).

This article, composed using literary sources and archival materials, is dedicated to the 155th anniversary of Alexander Grigoryevich Lyutkevich - a prominent Russian ophthalmologist of the late 19th and early 20th centuries (12.09.1867-18.04.1928) and one of the founders of the Voronezh Medical Institute. The paper traces the main stages of his biography, notes his work in rapid-reaction emergency care units, and pays attention to his teaching activities. The importance of Lyutkevich's doctoral dissertation on the treatment of high myopia is emphasized. The article also highlights his important role as editor of the classic textbook "Course of eye diseases" by A.A. Kryukov. In Lyutkevich's public activities, his contribution to the establishment of the Society of Ophthalmologists in Moscow is particularly noteworthy. Lyutkevich's high organizational skills are highlighted, which were clearly manifested in the Yuriev University and in the creation of the medical faculty of the Voronezh University.

'Eccentricity', by DH Tuke (1892).

An astronomical concept up to the eighteenth century, 'eccentricity' started to be used to refer to behaviours considered as odd, strange, rare, extravagant, etc. Once reified into a personality trait, it gained explanatory power. This not only increased its popularity but also facilitated its links with psychopathology and neuropsychology, and, via the shared concept of madness, with the notions of genius and creativity. This Classic Text describes the process whereby Alienism (Psychiatry) medicalized eccentricity. To this day, the latter remains firmly attached to 'psychoticism' and to some personality disorders.

[From the history of domestic dentistry: Moscow Dental School of the Privat-docent of Moscow University, MD Gilyariy Ivanovich Vilga]. / Iz istorii otechestvennoi stomatologii: Moskovskaya zubovrachebnaya shkola privat-dotsenta Moskovskogo universiteta doktora meditsiny Gilyariya Ivanovicha Vil'ga.

Based on archival data, the authors describe the Moscow School of Dentistry with dental courses for doctors, dentists, and dentists of the Moscow University, Privat-docent Dr. Gilyari Ivanovich Vilga, examine the background to its formation, provide unique archival data on the location of the school, as well as its internal organization and equipment. The authors review in detail the program of courses, as well as their duration, cost, and form of student accountability. During its existence (1909-1918), more than two thousand dentists were educated at G.I. Vilg's school, among them Alexander Ivanovich Evdokimov, a future corresponding member of the USSR Academy of Medical Sciences, director of the State Institute of Dentistry (GIZ) and the State Institute of Dentistry and Odontology (GIZO). The authors of the article also focus on analyzing the differences in the approaches to the organization of several dental schools, viz: The First Moscow I.M. Kovarsky School of Dentistry and the Second G.I. Vilga School of Dentistry. In his efforts, I.M. Kovarskij's aspirations to establish the best dental school in Russia were crowned with success: a specially constructed and equipped building meeting the state-of-the-art requirements (the building even boasted an X-ray machine), and the best professors and instructors of the University of Moscow of that time were hired. In contrast, G.I. Vilga rented premises for his school, the equipment was in short supply, and he himself was the only eminent professor. Nevertheless, his fierce desire to unite the entire dental community and organize the best dental care for the entire population of Russia allowed his brainchild to enter the top five schools of the time.