This article concerns the notion of living bodies that Spinoza develops in the Ethics (published posthumously in 1677). While commentators have emphasized the relevance of Spinoza’s works for contemporary physiology, they have neglected to study Spinoza’s own views on this topic. My aim is to draw attention to the specific parti pris that underlies Spinoza’s passages on anatomy. To do so, I first compare Spinoza’s claims on human body with the conceptions developed in his immediate historical environment. Then, I propose (...) to draw a parallel between Lakatos’s notion of “negative heuristics” and the high level of generalization Spinoza demonstrates in his propositions on the human body. This parallel allows me to show how Spinoza’s critical remarks on our knowledge of human body have heuristic value. (shrink)

En 1810, Gall et Spurzheim posent le diagnostic suivant : la piètre connaissance du substrat cérébral des facultés mentales doit être imputée à la longue inféodation de l’anatomie par la métaphysique. Dans le présent article, nous interrogeons un tel jugement historique à partir du Discours sur l’anatomie du cerveau de Niels Steensen. La présentation des « systèmes » de localisation cérébrale que Steensen critique (celui des « Anciens », celui de Thomas Willis et celui de Descartes) nous permettra d’abord de (...) brosser un tableau des différentes conceptions possibles du « siège de l’âme » au XVIIe siècle. Nous montrerons ensuite comment, dans ces trois cas de figure, la mise en correspondance d’une anatomie neurocérébrale lacunaire et d’une topique des grandes facultés mentales conduit à postuler que telle ou telle partie cérébrale est le siège de la mémoire, celui de l’imagination ou encore celui du sens commun. Enfin, nous montrerons que c’est au nom de la science anatomique, restreinte à ce qui peut être attesté par des témoins oculaires, que Steensen a écarté le principe même des localisations cérébrales. (shrink)

Nicolas Steno’s criticism of L’Homme played a major role in the early reception of Cartesianism: from the late 1660s, the Discourse on the Anatomy of the Brain has never ceased being used in order to discredit Descartes’s philosophy. And yet, the anatomical works of Nicolas Steno are themselves informed by Cartesian method. This paradox has led to the depiction of Steno either as a repentant Cartesian or a non-Cartesian mechanist. In this paper, I clarify such problematic labels by studying the (...) different kinds of relationships between anthropology and anatomy that L’Homme may have used to justify. In particular, I show how Descartes’ clock analogy was used to defend two different conceptions of the articulation between anatomical observations and functional hypotheses respectively in La Forge and in Steno. (shrink)

The importance of teleology in the 18 th century has mainly been studied from the point of view of a few specific authors. Leibniz is one of the most convinced advocates of the use of final causes in both physics and metaphysics. Despite its significance for the history of teleology, very few studies were in fact devoted to the influence of the Leibnizian doctrine during the 18 th century. However, Leibniz’s reception allows us not only to understand his own views (...) on teleology in comparison with those that 18 th century thinkers attributed to him, but also to feed the conceptual debate on the legitimate articulation of finality and efficiency in natural philosophy in that period. Consequently, studies on 18 th century physico-theology may help us to clarify the following questions: what is the difference between explanations concerning organic functions and in the architectonic use of the principle of optimum in physics? And how exactly do “the details of physics” illustrate the general harmony of the world? In order to clarify these kinds of questions, the present issue explores how Leibniz’s 18 th century readers integrated in their own philosophical doctrines multiple interpretative possibilities opened up by Leibniz’s texts. (shrink)

In his philosophical writings, Leibniz regularly quotes Steno, Malpighi, Swammerdam and Leeuwenhoek not only to defend the preformationistic hypothesis, but also to praise their scientific methods as exemplary: he emphasizes the accuracy of their observations, the usefulness of their analogies or their skill at finding some 'series' in natural transformations. We will first analyse some epistemological features of the scientific writings of these four naturalists, which both delineate their 'mechanism' and meet several Leibnizian postulates, namely transspecific analogy grounded on the (...) uniformity of nature, anatomical resolution requiring a microscope to find the connection between phenomena, and finally the economy of postulates. Then, we will question the scientific implications of theoretical choices which are common to Leibniz's Protogaea and Steno's, Malpighi's and Swammerdam's writings about natural transformations. With this scientific background we can see how some mechanical assumptions shed light on Leibnizian conception of the continuity of thoughts. (shrink)

This chapter examines how the borderline cases pointed out by English naturalists and philosophers in the second half of the seventeenth-century call into doubt the common notion of life as a vegetative power. In the first part of this chapter, I focus on Nehemiah Grew’s notions of life and living beings by comparing his plant anatomy, in which he examines the cases of sponges and corals, with his physico-theology. In the second part, I confront Grew’s views on life to those (...) of John Ray and Ralph Cudworth. My aim is threefold. First, I want to show that there was then no agreement on what a “vital phenomenon” is. Second, I want to emphasize the fact that what we would classify today as physical phenomena, such as gravitation, were then regarded as living phenomena. Third, and accordingly, I would like to challenge the view that the English naturalists and philosophers who then developed a physico-theology simply used empirical vital phenomena in order to refute Descartes’ metaphysics. In my view, there were no such things as “empirical vital phenomena.” Indeed, the very identification and description of the phenomena considered as “vital” was a matter of interpretation, and those different authors did not share the same set of assumptions regarding what kinds of beings are alive. At the very least, they do not share the set of assumptions that define what we regard as “vital.”. (shrink)

In his Elementorum Myologiae Specimen, Steno geometrizes “the new fabric of muscles” and their movement of contraction, so as to refute the main contemporary hypothesis about the functioning of the muscles. This physiological refutation relies on an abstract representation of the muscular fibre as a parallelepiped of flesh transversally linked to the tendons. Those two features have been comprehensively studied. But the method used by Steno, as well as the way he has chosen to present his physiological results, have so (...) far been neglected. Yet, Steno’s work follows a true synthetic order, which he conceives as a tool to separate uncertain anatomical “elements” from the certain ones. We will show that the true understanding of this “more geometrico” order is the only way to avoid frequent misconceptions of the scientific aim pursued by Steno, which is neither to give a mathematical explanation of the functioning of the muscles, nor to reduce the muscles to some mathematical shapes. (shrink)

In his Elementorum Myologiae Specimen, Steno geometrizes "the new fabric of muscles" and their movement of contraction, so as to refute the main contemporary hypothesis about the functioning of the muscles. This physiological refutation relies on an abstract representation of the muscular fibre as a parallelepiped of flesh transversally linked to the tendons. Those two features have been comprehensively studied. But the method used by Steno, as well as the way he has chosen to present his physiological results, have so (...) far been neglected. Yet, Steno's work follows a true synthetic order, which he conceives as a tool to separate uncertain anatomical "elements" from the certain ones. We will show that the true understanding of this "more geometrico" order is the only way to avoid frequent misconceptions of the scientific aim pursued by Steno, which is neither to give a mathematical explanation of the functioning of the muscles, nor to reduce the muscles to some mathematical shapes. (shrink)

In his Elementorum Myologiae Specimen, Steno geometrizes “the new fabric of muscles” and their movement of contraction, so as to refute the main contemporary hypothesis about the functioning of the muscles. This physiological refutation relies on an abstract representation of the muscular fibre as a parallelepiped of flesh transversally linked to the tendons. Those two features have been comprehensively studied. But the method used by Steno, as well as the way he has chosen to present his physiological results, have so (...) far been neglected. Yet, Steno’s work follows a true synthetic order, which he conceives as a tool to separate uncertain anatomical “elements” from the certain ones. We will show that the true understanding of this “more geometrico” order is the only way to avoid frequent misconceptions of the scientific aim pursued by Steno, which is neither to give a mathematical explanation of the functioning of the muscles, nor to reduce the muscles to some mathematical shapes. (shrink)

In this article we distinguish four kinds of finalities at stake in Nieuwentijt’s “scopologia” (general design, teleology of health, particular final causes and organic uses). We show that the tension between the principle of economy and the assignation of particular final causes in Nieuwentijt’s physico-theology perfectly illustrates what later commentators as Gould and Lewontin called the problem of ‘panglossism’ in biology. It was a problem to which Leibniz himself drew attention in different texts.

This article is about the exchanges between Leibniz, Arnauld, Bayle and Lamy on the subject of pain. The inability of Leibniz’s system to account for the phenomenon of pain is a recurring objection of Leibniz’s seventeenth-century Cartesian readers to his hypothesis of pre-established harmony: according to them, the spontaneity of the soul and its representative nature cannot account for the affective component of pain. Strikingly enough, this problem has almost never been addressed in Leibniz studies, or only incidentally, through the (...) more general problem of evil. My purpose in this article is to clarify Leibniz’s psychophysical parallelism by opposing his representationist account of pain to the functionalist account endorsed by Arnauld, Bayle, Lamy and Malebranche. (shrink)

How are we to connect the mechanist methodology used by Baglivi in his physiological treatises with the apparently strict empiricism that he promotes in his therapeutic work entitled Practice of Physick, reduc’d to the Ancient Way of Observations? In order to answer this question, we examine the methodological implications of the “history of diseases” that Baglivi promotes by using Bacon’s recommendations in the Novum organum. Then, we compare this result with the place that historians generally gave to Baglivi in the (...) medical context of that time: the place of a dogmatic and “iatromechanist” physician who was far from practical and therapeutic concerns. This confrontation allows us first to apprehend the polemical origin of the so-called “iatromechanism” as a historiographical label, and second, to question the preeminence of the role of observations in the shaping of the classical distinction between “rational” physicians and “empirical” ones. When Early Modern physicians use the dichotomy between “empirical” and “rationalist” in order to discredit what they perceive as oversimplification or dogmatism, there is most often a third group at stake: a group which is depicted as the providential and intelligent solution to sectarianism. For Baglivi, this third group would be an “Empirick rational sect.” The distinction between a medicina prima and a medicina secunda allows us to understand such an apparently paradoxical category. (shrink)

Quel est le statut des lois de la nature ? Telle est la question posée dans ce livre d’André Charrak. L’auteur montre que la philosophie des Lumières envisage le problème de la connaissance sous l’angle de « l’application des principes aux phénomènes et des sciences les unes aux autres » (p. 199) et qu’il existe un lien direct entre la possibilité de l’application de la mathématique à la physique dans les savoirs positifs et les partis pris explicites sur le statut (...) modal des lois du mouvement.. (shrink)

Dans cet ouvrage, Marc Parmentier entreprend une étude des Nouveaux essais dont l’originalité est à la fois de ne pas adopter le seul point de vue leibnizien et de tenir compte de la diversité des objets philosophiques abordés dans ce monumental ouvrage. La thèse centrale qui guide l’auteur dans cette entreprise est la suivante : les Nouveaux essais ne doivent pas être lus comme un simple dialogue philosophique, mais plutôt comme une « intrigue philosophique ». Elle permet de faire droit (...) au c.. (shrink)