Descartes’ Man Under Construction: The Circulatory Statue of Salomon Reisel, 1680

2020 ◽  
Vol 25 (2) ◽  
pp. 101-134
Author(s):  
Mattia Mantovani
Keyword(s):  
Blood Circulation ◽  
Three Dimensional ◽  
Modern Science ◽  
Circulation System ◽  
Three Dimensional Model ◽  
Blood Circulation System ◽  
Under Construction ◽  
Circulation Of The Blood ◽  
The Brain ◽  
Scientific Academies

Abstract This paper studies the “human circulatory statues” which Salomon Reisel designed in the 1670s in order to demonstrate the circulation of the blood and its effect on the brain. It investigates how Reisel intended this project to promote Descartes’ philosophy, and how it relates to contemporary diagrammatic schematizations of the blood circulation system. It further explores Reisel’s claims concerning the epistemological and practical advantages of working with a three-dimensional model and argues that Reisel intended his statua to address the concerns of his fellow physicians and, more specifically, to help in diagnostics. I consider the background, strategy and legacy of the essays in which Reisel presented his devices, as well as their relevance to the general project of the scien­tific journal – one of the earliest – in which they appeared, the Miscellanea Curiosa. Reisel was a leading physician who acted throughout his life as a mediator between the Royal Society and the Academia Naturæ Curiosorum. His articles, the paper argues, have much to tell us much about the role played by the recently established scientific academies and their journals in shaping the transmission of early modern science and medicine, in terms both of theories and of the knowledge embodied in scientific instruments.

Micro Vascularization of the Cerebral Cortex in Frontal and Parietal Lobes of the Rabbit (Oryctolagus Cunniculus)

1999 ◽  
Vol 5 (S2) ◽  
pp. 1208-1209
Author(s):  
R.P. Chopard ◽  
C.I. Conegero ◽  
I. Watanabe ◽  
R. Ocaña
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Cerebral Cortex ◽  
Blood Circulation ◽  
Brain Cortex ◽  
Brain Regions ◽  
Circulation System ◽  
Parietal Lobes ◽  
Blood Circulation System ◽  
The Brain

In order to warrant the blood supply to the nervous system it is necessary an efficient and intact blood circulation system, where the pattern of vascularization is of fundamental importance. In this way, we intend to demonstrate the tridimensional architecture and the pattern of vascularization in the region of the brain cortex of frontal and parietal lobes. There for, our proposal is to study the microvascularization of the rabbit cortex (Oryctologus cuniculus).The studies about blood irrigation of the brain regions are very important to verify the capilar nets and their relations with intensity of blood flux in specified regions of central nervous system.The articles about vascularization that uses models obtained by the injection of aloplastic materials whose viscosity is similar to the blood's that allows the difusion until the capilar net was introduced by Murakami (1971). Lametschwandter et al (1984), studied aspects of corrosion technique to microvascular models.

scholarly journals System of cerebral blood circulation regulation in patients with tumors of the chiasm-sellar region

1997 ◽  
Vol 78 (6) ◽  
pp. 451-453
Author(s):  
V. I. Danilov ◽  
S. N. Martynenko
Keyword(s):  
Blood Circulation ◽  
Surgical Intervention ◽  
The State ◽  
Regulatory Mechanisms ◽  
Circulation System ◽  
Sellar Region ◽  
Blood Circulation System ◽  
Pharmacological Correction ◽  
The Brain ◽  
Cerebral Blood Circulation

The state of regulatory mechanisms of cerebral blood circulation in patients with tumors of the chiasm sellar region before surgical intervention is studied. The disorders of circular supply of homeostasis of the brain in carotid and vertebrobasilar basins are revealed. The necessity of control of the state of cerebral blood circulation system and pharmacological correction of its disorders before operation in these patients is noted.

STUDY OF THE PREVALENCE OF DENTOALVEOLAR ANOMALIES, INCLUDING DISTAL BITE IN CHILDREN AND ADOLESCENTS

Vestnik ◽  
2021 ◽  
pp. 133-137
Author(s):  
Г.Т. Ермуханова ◽  
А.О. Етекбаева
Keyword(s):  
Children And Adolescents ◽  
Blood Circulation ◽  
Circulation System ◽  
Dental Anomalies ◽  
Functional Changes ◽  
Facial Region ◽  
Blood Circulation System ◽  
Lateral Segment ◽  
Distal Occlusion ◽  
Maxillary Region

В данной статье описывается изучение распространенности зубочелюстных аномалий, в том числе и дистального прикуса среди детей и подростков школьного возраста. В настоящее время широко распространены зубочелюстные аномалии, в том числе дистальный прикус среди детей и подростков. Зубочелюстные аномалии приводят к функциональной патологии морфологических нарушений челюстной области. Изменения возрастно увеличиваются и сопровождаются деформацией лицевой области черепа наряду с эстетическими отклонениями.У больных часто наблюдаются нарушения положения позвоночника,функциональные изменения в системе малого кровообращения и задержка психосомтического развития.Это говорит о ранних нарушениях профилактики и несвоевременном оказании ортодонтической,зубопротезной и комплексной медицинской помощи.В связи с этим важную роль играет эпидемиологическая ситуация по зубной аномалии. исполняют информацию. Диагноз дистальной окклюзии называется боковым сегментом верхнего зубного ряда, расположенным перед боковым сегментом нижнего зубного ряда и появлением между ними дистальной стадии. Лечение и прогноз дистальной окклюзии зубного ряда зависит от возраста больного и характера аномалии [1] The article is devoted to the study of the prevalence of dentition anomalies, including distal occlusion among children and adolescents of school age. Currently, dental anomalies, including distal bite, are widespread among children and adolescents. Dental anomalies lead to functional pathology of morphological disorders of the maxillary region. The changes increase with age and are accompanied by deformation of the facial region of the skull along with aesthetic deviations. Patients often have disorders of the spine position, functional changes in the small blood circulation system and delayed psychosomal development.It tells about the early breaches of the prevention of and untimely provision of orthodontic, prosthodontic and comprehensive medical care.In this regard, an important role is played by the epidemiological situation of dental anomalies. execute information. The diagnosis of distal occlusion is called the lateral segment of the upper dentition, located in front of the lateral segment of the lower dentition and the appearance of the distal stage between them. Treatment and prognosis of distal occlusion of the dentition depends on the patient's age and the nature of the anomalies [1].

Influences of the Compliances and the Resistance on Pulsatile Flow Waveforms

2013 ◽  
Vol 477-478 ◽  
pp. 217-220
Author(s):  
Wen Bo He ◽  
Yuan Wang ◽  
Xiao Yan Gong
Keyword(s):  
Blood Circulation ◽  
Mean Amplitude ◽  
Circulation System ◽  
Aortic Blood Flow ◽  
Blood Circulation System ◽  
Aortic Blood ◽  
Pulsatile Pressure ◽  
The Mean ◽  
Flow Waveforms ◽  
Peak Value

A pulsatile circulation system has been built to simulate aortic blood flow. The system has both upstream and downstream compliances and resistances to simulate the elasticity and resistances of blood circulation system. Influences of the compliances and resistances on the pulsatile pressure waveforms have been systematically studied using this system. We found that in absence of the compliances and the downstream resistance, it results in an oversize negative pulsation to the pressure waveforms. The downstream resistance hardly affects the structure of the pressure waveforms, whereas the mean amplitude of pressure increases along with the downstream resistance. The compliance can reduce the peak value of the pressure, which is unrelated to the location of the compliance but related to the elasticity in the system. With fixed upstream system elasticity, the pressure waveform is more stable.

scholarly journals The Localization of Activity Sources in a Three-Dimensional Model of the Human Brain Using the Joint Analysis of EEG / sMRI Data

2019 ◽  
Vol 17 (3) ◽  
pp. 18-28
Author(s):  
E. Bykova ◽  
A. Savostyanov
Keyword(s):  
Inverse Problem ◽  
Brain Activity ◽  
Three Dimensional ◽  
Human Head ◽  
Joint Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Use Of Data ◽  
The Individual ◽  
The Brain

Despite the large number of existing methods of the diagnosis of the brain, brain remains the least studied part of the human body. Electroencephalography (EEG) is one of the most popular methods of studying of brain activity due to its relative cheapness, harmless, and mobility of equipment. While analyzing the EEG data of the brain, the problem of solving of the inverse problem of electroencephalography, the localization of the sources of electrical activity of the brain, arises. This problem can be formulated as follows: according to the signals recorded on the surface of the head, it is necessary to determine the location of sources of these signals in the brain. The purpose of my research is to develop a software system for localization of brain activity sources based on the joint analysis of EEG and sMRI data. There are various approaches to solving of the inverse problem of EEG. To obtain the most exact results, some of them involve the use of data on the individual anatomy of the human head – structural magnetic resonance imaging (sMRI data). In this paper, one of these approaches is supposed to be used – Electromagnetic Spatiotemporal Independent Component Analysis (EMSICA) proposed by A. Tsai. The article describes the main stages of the system, such as preprocessing of the initial data; the calculation of the special matrix of the EMSICA approach, the values of which show the level of activity of a certain part of the brain; visualization of brain activity sources on its three-dimensional model.

Sign in / Sign up

Export Citation Format

Share Document