Facial expression is a mode of close‐proximity non‐vocal communication used by primates and is produced by mimetic/facial musculature. Arguably, primates make the most‐intricate facial displays and have some of the most‐complex facial musculature of all mammals. Most of the earlier ideas of primate mimetic musculature, involving its function in facial displays and its evolution, were essentially linear “scala natural” models of increasing complexity. More‐recent work has challenged these ideas, suggesting that ecological factors and social systems have played (...) a much larger role in explaining the diversity of structures than previously believed. The present review synthesizes the evidence from gross muscular, microanatomical, behavioral and neurobiological studies in order to provide a preliminary analysis of the factors responsible for the evolution of primate facial musculature with comparisons to general mammals. In addition, the unique structure, function and evolution of human mimetic musculature are discussed, along with the potential influential roles of human speech and eye gaze. BioEssays 30:212–225, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

The origin of the notochord is one of the key remaining mysteries of our evolutionary ancestry. Here, we present a multi‐level comparison of the chordate notochord to the axochord, a paired axial muscle spanning the ventral midline of annelid worms and other invertebrates. At the cellular level, comparative molecular profiling in the marine annelids P. dumerilii and C. teleta reveals expression of similar, specific gene sets in presumptive axochordal and notochordal cells. These cells also occupy corresponding positions in a conserved (...) anatomical topology and undergo similar morphogenetic movements. At the organ level, a detailed comparison of bilaterian musculatures reveals that most phyla form axochord‐like muscles, suggesting that such a muscle was already present in urbilaterian ancestors. Integrating comparative evidence at the cell and organ level, we propose that the notochord evolved by modification of a ventromedian muscle followed by the assembly of an axial complex supporting swimming in vertebrate ancestors. (shrink)

Inner speech is commonly understood as the conscious experience of a voice within the mind. One recurrent theme in the scientific literature is that the phenomenon involves a representation of overt speech, for example, a representation of phonetic properties that result from a copy of speech instructions that were ultimately suppressed. I propose a larger picture that involves some embodied objects and their misperception. I call it “the Body Error Theory,” or BET for short. BET is a form of illusionism, (...) but the particular version I favor is a cross-modal illusion. Newly described here, my hypothesis is that the experience of inner speech arises from a mix of interoception and audition. Specifically, there is the detection of slight but well-confirmed activities in the speech musculature that occur during inner speech, which helps to transform representations of normal but quiet nonverbal sounds that inevitably occur during inner speech, from breathing to background noise, into a mistaken perception of inner speech. Simply put, activities in the speech musculature mix with sounds to create the appearance of speech sounds, which thus explains the “voice within the mind.” I also show how BET’s cross-modal system fits with standard information processing accounts for speech monitoring and how it accommodates the central insights of leading theories of inner speech. In addition, I show how BET is supported by data from experience-sampling surveys and how it can be empirically tested against its rivals. (shrink)

Human behavior is the joint product of (i) contingencies of survival responsible for natural selection, and (ii) contingencies of reinforcement responsible for the repertoires of individuals, including (iii) the special contingencies maintained by an evolved social environment. Selection by consequences is a causal mode found only in living things, or in machines made by living things. It was first recognized in natural selection: Reproduction, a first consequence, led to the evolution of cells, organs, and organisms reproducing themselves under increasingly diverse (...) conditions. The behavior functioned well, however, only under conditions similar to those under which it was selected.Reproduction under a wider range of consequences became possible with the evolution of processes through which organisms acquired behavior appropriate to novel environments. One of these, operant conditioning, is a second kind of selection by consequences: New responses could be strengthened by events which followed them. When the selecting consequences are the same, operant conditioning and natural selection work together redundantly. But because a species which quickly acquires behavior appropriate to an environment has less need for an innate repertoire, operant conditioning could replace as well as supplement the natural selection of behavior.Social behavior is within easy range of natural selection, because other members are one of the most stable features of the environment of a species. The human species presumably became more social when its vocal musculature came under operant control. Verbal behavior greatly increased the importance of a third kind of selection by consequences, the evolution of social environments or cultures. The effect on the group, and not the reinforcing consequences for individual members, is responsible for the evolution of culture. (shrink)

The position of individuals' bodies (e.g., holding a pencil in the mouth in a way that either facilitates or inhibits smiling musculature) can influence their emotional reactions to the stimuli they encounter, and can even impact their explicit preferences for one item over another. In this article we begin by reviewing the literature demonstrating these effects, explore mechanisms to explain this body-preference link, and introduce new work from our lab that asks whether one's bodily or motor experiences might also (...) shape preferences in situations where the body is not contorted in a particular position, or when there is no intention to act. Such work suggests that one consequence of perceiving an object is the automatic and covert motor simulation of acting on this object. This, in turn, provides individuals with information about how easy or hard this action would be. It transpires that we like to do what is easy, and we also prefer objects that are easier to act on. The notion that judgments of object likeability are driven by motoric information furthers embodied cognition theories by demonstrating that even our preferences are grounded in action. (shrink)

Although we have learned much about the neuropsychological control of facial expressions of emotion, there is still much work to do. We suggest that future work integrate advances in our theoretical understanding of the roles of volition and consciousness in the elicitation of emotion and the production of facial expressions with advances in our understanding of its underlying neurophysiology. We first review the facial musculature and the neural paths thought to innervate it, as well as previous attempts at understanding (...) the neural control of facial expressions of emotion, focusing on the voluntary-involuntary dichotomy and studies of hemispheric specialization. In the second section, we discuss four major aspects of the psychology of facial expressions of emotion that have particular import to their neurophysiological substrates. We offer these as a starting point for a better integration of psychological and neurophysiological perspectives in considering the neuropsychological control of facial expressions of emotion. (shrink)

It is suggested that the evolutionary advantage of consciousness lies in its mediating the acquisition of novel context-specific reflexes, particularly when the context has temporally varying components. Such acquisition is conjectured to require evaluation of feedback stimuli evoked by the animal's self-paced probing of its environment, or by memories of the outcome of previous such probings, and the evaluation is postulated to be predicated on attention. It is argued that such an approach automatically incorporates sensation into the phenomenon, sensation arising (...) from an interplay between the nervous system and the skeletal musculature, and not from the nervous system alone. This theory avoids the increasingly untenable view that consciousness is part of the normal chain of events linking unprovoked stimuli in the outside world with immediate voluntary reactions to them. The theory should prove attractive to those who might otherwise feel compelled by neurophysiology to embrace epiphenomenalism. It also provides a means of bridging the explanatory gap, and of resolving the celebrated hard problem of consciousness. (shrink)

En s’appuyant sur les autobiographies de douze élèves « à problèmes », l’auteure interroge deux paradigmes de la psychanalyse contemporaine. Le paradigme archéologique, cherchant à découvrir le latent derrière le manifeste, se situe du côté d’une logique orientée vers le passé. A l’opposé, le paradigme transformatif, dont le but est de développer la « musculature psychique », vise l’ouverture à une pluralité de possibles résidant dans l’avenir. L’auteure montre l’intérêt de dialectiser ces deux approches, tant dans la clinique que (...) dans l’approche des productions culturelles, autobiographie comprise. Les enjeux éthiques découlant de l’intervention de l’analyste/interprète prennent une importante centrale. (shrink)

Vesalius wrote nothing about the aesthetics of the anatomical illustrations found in his De humani corporis fabrica (1543). There are, however, two passages in this work that offer a starting point for an investigation into the illustration’s idealised style. In discussing the body that is best for a public dissection Vesalius says that it must be one that resembles the ‘Canon of Polycleitus’, and later, he refers to his pursuit of the historia absoluti hominis or historia of the perfect man. (...) These two passage lie at the heart of a solution to questions concerning the style of Vesalius’s illustrations. -/- This thesis seeks to investigate the role that visual material (art) played in determining the visual character of Vesalius’s natural philosophical illustrations. In antiquity art and nature were generally thought to be opposed. This distinction was undermined in the sixteenth century as images came to play a role in acquiring and conveying knowledge about the natural world. The role that art played in determining the visual character of Vesalius’s illustrations, I argue, constitutes another facet of the undermining of the ancient opposition between art and nature that occurred in the sixteenth century. The relationship between art and nature forms the basis of my investigation into the style of Vesalius’s illustrations. -/- I examine three separate but interrelated avenues which, I suggest, played a role in determining the style of the Fabrica illustrations. The first derives from the history of natural philosophy and medicine. I suggest that the concepts art, nature, teleology, form and beauty as they are found in Plato’s Timaeus, and Marsilio Ficino’s sixteenth­century commentary on that work, provide an epistemology and account of the body that is also found in Galen’s On the Usefulness of the Parts of the Body, and subsequently reflected in both the text and illustrations of the Fabrica. This epistemological underpinning is entirely in keeping with the method of proportional representation of the body and associated aesthetic advocated in Polycleitus’s Canon. -/- The second avenue concerns the role that both ancient and Renaissance artworks played in determining the style of the Fabrica illustrations. While the illustrations embody the ideal and typical form advocated in the Canon they also embellish this, and contain stylistic features derived from Hellenistic sculpture and found in High Renaissance art. I argue for specific parallels between Hellenistic sculpture, Michelangelo’s nudes in his Sistine Chapel frescos and Vesalius’s illustrations. -/- Thirdly, I consider Renaissance artwriting and aesthetics as a source for understanding the idealised style of the Vesalian illustrations. In particular I examine Leon Battista Alberti’s tabulation of the ideal man and his aesthetic principle concinnitas. This offers a Renaissance account of beauty and the ideal that is analogous to the Canon of Polycleitus, is central to an understanding of Italian Renaissance art and aesthetics, and has a particular application to Vesalius’s illustrations and their teleological underpinnings. I suggest that contrapposto as the expression of antithesis in art offers a theoretic parallel for the augmentation of the austere classical style found in Vesalius’s own use of contrapposto and his interest in musculature and movement. -/- Throughout, this thesis is concerned with relationships between visual materials. I elaborate on this theme through an investigation of the influence that Vesalius’s illustrations had on a selection of anatomical illustrations that came in its wake. I construe the relationships that obtain between these illustrations as analogous to those which occur in what are termed art historical ‘movements’. (shrink)

I review how both the parasegmental and segmental frames are used in constructing the body plan of the arthropods. The parasegment is the primary genetic unit, as shown by Hox gene expression, and the parasegmental design is maintained in the nerve cord. It is, however, not maintained in the epidermis, where the cuticle grooves are segmental, and in the musculature, which is segmental in organisation. This frame shift is reflected in the sensory and motor nerve connections between the ganglia (...) and the periphery. I suggest that the need for movement in an organism equipped with a hard exoskeleton was the functional constraint that shaped this apparently complex mode of development. BioEssays 26:1117–1125, 2004. © 2004 Wiley Periodicals, Inc. (shrink)

There are a limited number of neuroimaging investigations into motor control of the lumbopelvic musculature. Most investigation examining motor control of the lumbopelvic musculature utilize transcranial magnetic stimulation and focus primarily on the motor cortex. This has resulted in a dearth of knowledge as it relates to how other regions of the brain activate during lumbopelvic movement. Additionally, task-based functional connectivity during lumbopelvic movements has not been well elucidated. Therefore, we used functional magnetic resonance imaging to examine brain (...) activation and ROI-to-ROI task-based functional connectivity in 19 healthy individuals during the performance of three lumbopelvic movements: modified bilateral bridge, left unilateral bridge, and right unilateral bridge. The whole brain analysis found robust, bilateral activation within the motor regions of the brain during the bilateral bridge task, and contralateral activation of the motor regions during unilateral bridging tasks. Furthermore, the ROI-to-ROI analysis demonstrated significant connectivity of a motor network that included the supplemental motor area, bilateral precentral gyrus, and bilateral cerebellum regardless of the motor task performed. These data suggest that while whole brain activation reveals unique patterns of activation across the three tasks, functional connectivity is very similar. As motor control of the lumbopelvic area is of high interest to those studying low back pain, this study can provide a comparison for future research into potential connectivity changes that occur in individuals with LBP. (shrink)

It is likely that the system controlling speech has evolved from the one that controls feeding. However, the idea that frames and content are programmed independently by two different cortical areas is not plausible. Models of the speech control system must also take into account the need to coordinate the respiratory, laryngeal, and articulatory musculature.

This paper is a summary and extension of almost four decades of research directed toward an explication of the human mind. To achieve a precise, testable proposition that defines mind, I follow a historically rich tradition of materialism. First, an empirical basis is established wherein electropsychologically measured events from the brain, eyes, somatic and speech musculature occur almost simultaneously during a variety of cognitions. The inference is that these covert reactions form components of neuromuscular circuits governed by cybernetic principles. (...) Conversely, when the striated musculature is totally inactive, cognitions are absent. The conclusion is that muscular components of the circuits are necessary for cognitions. An explication of the human mind emerges as the selective interaction of bodily systems to generate contents of mind and to program covert and overt behavior. Clinical and educational applications follow. (shrink)

The idea of a neuromuscular synergy involving independent amplitude commands to the agonist and antagonist musculature is quite an appealing part of Plamondon's theory. One question that might be raised relates to the relative independence of the two commands. Evidence is presented that suggests that the two commands might be related in sequential or simultaneous rapid aiming movements.

In the current opinion paper, we provide a comparative perspective on specific aspects of primate empathic abilities, with particular emphasis on the mirror neuron system associated with mouth/face actions and expression. Mouth and faces can be very salient communicative classes of stimuli that allow an observer access to the emotional and physiological content of other individuals. We thus describe patterns of activations of neural populations related to observation and execution of specific mouth actions and emotional facial expressions in some species (...) of monkeys and in humans. Particular attention is given to dynamics of face-to-face interactions in the early phases of development and to the differences in the anatomy of facial muscles among different species of primates. We hypothesize that increased complexity in social environments and patterns of social development have promoted specializations of facial musculature, behavioral repertoires related to production and recognition of facial emotional expression, and their neural correlates. In several primates, mirror circuits involving parietal-frontal regions, insular regions, cingulate cortices, and amygdala seem to support automatic forms of embodied empathy, which probably contribute to facial mimicry and behavioural synchrony. In humans these circuits interact with specific prefrontal and temporo-parietal cortical regions, which facilitates higher order cognitive functions such as cognitive empathy and mental state attribution. Our analysis thus suggests that the evolution of higher forms of empathy, such as mentalizing, is also linked to the coupling between the perceptual and motor system related to face processing, which may have undergone a process of exaptation during primate phylogeny. (shrink)

Embodied simulation and the epistemic motivation to search for the of other people's behaviors are not necessary for specific and functional responding to, and hence processing of, human facial expressions. Rather, facial expression processing can be achieved through lower-cognitive, heuristical perceptual processing and expression of prototypical morphological musculature movement patterns that communicate discrete trustworthiness and capacity cues to conspecifics.

The SIMS model claims that it is by means of an embodied simulation that we determine the meaning of an observed smile. This suggests that crucial interpretative work is done in the mapping that takes us from a perceived smile to the activation of one's own facial musculature. How is this mapping achieved? Might it depend upon a prior interpretation arrived at on the basis of perceptual and contextual information?

À chacune/chacun, son image de la fille en garçon, et la panoplie vestimentaire qui va avec : complet trois pièces, salopette, cuirasse, strass, smoking, perfecto, bloomer, pourpoint, monocle, lévite de bure, chevelures rases, musculatures gonflées... Qui n'a pas rêvé de Katherine Hepburn dans Sylvia Scarlett et de Greta Garbo en Christine de Suède, de Jeanne Moreau entre Jules et Jim, de Barbara Streisand jouant Yentl, de Sarah Bernhardt faisant l'Aiglon, sans parler d'héroïnes plus...

Cell‐based therapies for degenerative diseases of the musculature remain on the verge of feasibility. Myogenic cells are relatively abundant, accessible, and typically harbor significant proliferative potential ex vivo. However, their use for therapeutic intervention is limited due to several critical aspects of their complex biology. Recent insights based on mouse models have advanced our understanding of the molecular mechanisms controlling the function of myogenic progenitors significantly. Moreover, the discovery of atypical myogenic cell types with the ability to cross the (...) blood‐muscle barrier has opened exciting new therapeutic avenues. In this paper, we outline the major problems that are currently associated with the manipulation of myogenic cells and discuss promising strategies to overcome these obstacles. (shrink)

À chacune/chacun, son image de la fille en garçon, et la panoplie vestimentaire qui va avec : complet trois pièces, salopette, cuirasse, strass, smoking, perfecto, bloomer, pourpoint, monocle, lévite de bure, chevelures rases, musculatures gonflées... Qui n'a pas rêvé de Katherine Hepburn dans Sylvia Scarlett et de Greta Garbo en Christine de Suède, de Jeanne Moreau entre Jules et Jim, de Barbara Streisand jouant Yentl, de Sarah Bernhardt faisant l'Aiglon, sans parler d'héroïnes plus...

An investigation into the historical development of Nike's award-winning advertising campaigns in the US reveals that, over the last decade or so, African-American athletes have become their almost exclusive focus. However, these ads have increasingly centered not on black personalities per se, but on the aesthetic, affective and visceral manifestations of skin, musculature and sweat. Black bodies in advertising are rarely to be seen at rest, unless in a state of exhaustion (from which the requisite product alone can provide (...) relief). Consideration is therefore given to the potential connotations of cultural producers' repeated references to extreme physical exertion. Anson Rabinbach's trope of the `human motor' evokes modern science's concern with matters of energy preservation and entropy; here it is utilized to provide a fresh insight into the chronic contradictions between commercial cultural production on one hand, and the reality of contemporary cultural and social inequalities on the other. (shrink)

Set theory faces two difficulties: formal definitions of sets/subsets are incapable of assessing biophysical issues; formal axiomatic systems are complete/inconsistent or incomplete/consistent. To overtake these problems reminiscent of the old-fashioned principle of individuation, we provide formal treatment/validation/operationalization of a methodological weapon termed “outer approach” (OA). The observer’s attention shifts from the system under evaluation to its surroundings, so that objects are investigated from outside. Subsets become just “holes” devoid of information inside larger sets. Sets are no longer passive containers, rather (...) active structures enabling their content’s examination. Consequences/applications of OA include: a) operationalization of paraconsistent logics, anticipated by unexpected forerunners, in terms of advanced truth theories of natural language; b) assessment of embryonic craniocaudal migration in terms of Turing’s spots; c) evaluation of hominids’ social behaviors in terms of evolutionary modifications of facial expression’s musculature; d) treatment of cortical action potentials in terms of collective movements of extracellular currents, leaving apart what happens inside the neurons; e) a critique of Shannon’s information in terms of the Arabic thinkers’ active/potential intellects. Also, OA provides an outer view of a) humanistic issues such as the enigmatic Celestino of Verona’s letter, Dante Alighieri’s “Hell” and the puzzling Voynich manuscript; b) historical issues such as Aldo Moro’s death. Summarizing, we suggest that the safest methodology to quantify phenomena is to remove them from our observation and tackle an outer view, since mathematical/logical issues such as selective information deletion and set complement rescue incompleteness/inconsistency of biophysical systems. (shrink)

A great deal of effort has been, and continues to be, devoted to developing consciousness artificially (A small selection of the many authors writing in this area includes: Cotterill (J Conscious Stud 2:290–311, 1995 , 1998 ), Haikonen ( 2003 ), Aleksander and Dunmall (J Conscious Stud 10:7–18, 2003 ), Sloman ( 2004 , 2005 ), Aleksander ( 2005 ), Holland and Knight ( 2006 ), and Chella and Manzotti ( 2007 )), and yet a similar amount of effort has (...) gone in to demonstrating the infeasibility of the whole enterprise (Most notably: Dreyfus ( 1972/1979 , 1992 , 1998 ), Searle ( 1980 ), Harnad (J Conscious Stud 10:67–75, 2003 ), and Sternberg ( 2007 ), but there are a great many others). My concern in this paper is to steer some navigable channel between the two positions, laying out the necessary pre-conditions for consciousness in an artificial system, and concentrating on what needs to hold for the system to perform as a human being or other phenomenally conscious agent in an intersubjectively-demanding social and moral environment. By adopting a thick notion of embodiment—one that is bound up with the concepts of the lived body and autopoiesis (Maturana and Varela 1980 ; Varela et al. 2003 ; and Ziemke 2003 , 2007a , J Conscious Stud 14(7):167–179, 2007b )—I will argue that machine phenomenology is only possible within an embodied distributed system that possesses a richly affective musculature and a nervous system such that it can, through action and repetition, develop its tactile-kinaesthetic memory, individual kinaesthetic melodies pertaining to habitual practices, and an anticipatory enactive kinaesthetic imagination. Without these capacities the system would remain unconscious, unaware of itself embodied within a world. Finally, and following on from Damasio’s ( 1991 , 1994 , 1999 , 2003 ) claims for the necessity of pre-reflective conscious, emotional, bodily responses for the development of an organism’s core and extended consciousness, I will argue that without these capacities any agent would be incapable of developing the sorts of somatic markers or saliency tags that enable affective reactions, and which are indispensable for effective decision-making and subsequent survival. My position, as presented here, remains agnostic about whether or not the creation of artificial consciousness is an attainable goal. (shrink)