Lecture 13. Language and Consciousness

We have cursed "psychology" because we were living in a "characterless" era … That era has passed, and so we again have need of the entire soul, the whole of what is life, the whole man … Back to the soul, not just to man, but to the "whole man"—with a spirit, with body and soul, with all that is part of life—thrice over.     

The Two Maya Bodies: An Elementary Model of Tzeltal Personhood

The purpose of this paper is to draw attention to the indigenous Maya-Tzeltal distinction between two types of human bodies: a carnal body, shared with animals, and a specifically human phenomenological body. This distinction, in turn, is equivalent to the indigenous distinction between two souls: a soul in a human shape and a soul in a non-human shape, generally that of an animal species. The parallelism between bodies and souls leads me to propose a reorganisation of the indigenous concept of the person in terms of a quaternary model, which remains essentially binary (body/soul) yet permits the integration of elements which are different from each other, like the two bodies and the two souls, and yet mutually necessary to make up the person.     

口臭微生态治疗技术研究进展

口臭是指呼吸时排出挥发性硫化物等臭味气体,主要由口腔微生态失调引起,具体为生理性菌群数目减少,产臭类菌群种类和数目增加。口臭是局部口腔或全身系统不良代谢状况的一种表现,临床可根据口腔异味来诊断疾病,并通过口腔微生态的调整来治疗口臭。本研究从口臭与微生态的关系、口臭主要相关微生物等方面进行分析,综述机械、化学和中医药等方法调整口腔微生态来治疗口臭的进展。     

Voice processing in human and non-human primates

Humans share with non-human primates a number of voice perception abilities of crucial importance in social interactions, such as the ability to identify a conspecific individual from its vocalizations. Speech perception is likely to have evolved in our ancestors on the basis of pre-existing neural mechanisms involved in extracting behaviourally relevant information from conspecific vocalizations (CVs). Studying the neural bases of voice perception in primates thus not only has the potential to shed light on cerebral mechanisms that may be--unlike those involved in speech perception--directly homologous between species, but also has direct implications for our understanding of how speech appeared in humans. In this comparative review, we focus on behavioural and neurobiological evidence relative to two issues central to voice perception in human and non-human primates: (i) are CVs 'special', i.e. are they analysed using dedicated cerebral mechanisms not used for other sound categories, and (ii) to what extent and using what neural mechanisms do primates identify conspecific individuals from their vocalizations?     

Monkey and humans exhibit similar motion-processing mechanisms

Single cell recording studies have resulted in a detailed understanding of motion-sensitive neurons in non-human primate visual cortex. However, it is not known to what extent response properties of motion-sensitive neurons in the non-human primate brain mirror response characteristics of motion-sensitive neurons in the human brain. Using a motion adaptation paradigm, the direction aftereffect, we show that changes in the activity of human motion-sensitive neurons to moving dot patterns that differ in dot density bear a strong resemblance to data from macaque monkey. We also show a division-like inhibition between neural populations tuned to opposite directions, which also mirrors neural-inhibitory behaviour in macaque. These findings strongly suggest that motion-sensitive neurons in human and non-human primates share common response and inhibitory characteristics.     

Seeing Minds in Others – Can Agents with Robotic Appearance Have Human-Like Preferences?

Ascribing mental states to non-human agents has been shown to increase their likeability and lead to better joint-task performance in human-robot interaction (HRI). However, it is currently unclear what physical features non-human agents need to possess in order to trigger mind attribution and whether different aspects of having a mind (e.g., feeling pain, being able to move) need different levels of human-likeness before they are readily ascribed to non-human agents. The current study addresses this issue by modeling how increasing the degree of human-like appearance (on a spectrum from mechanistic to humanoid to human) changes the likelihood by which mind is attributed towards non-human agents. We also test whether different internal states (e.g., being hungry, being alive) need different degrees of humanness before they are ascribed to non-human agents. The results suggest that the relationship between physical appearance and the degree to which mind is attributed to non-human agents is best described as a two-linear model with no change in mind attribution on the spectrum from mechanistic to humanoid robot, but a significant increase in mind attribution as soon as human features are included in the image. There seems to be a qualitative difference in the perception of mindful versus mindless agents given that increasing human-like appearance alone does not increase mind attribution until a certain threshold is reached, that is: agents need to be classified as having a mind first before the addition of more human-like features significantly increases the degree to which mind is attributed to that agent.     

Common and divergent psychobiological mechanisms underlying maternal behaviors in non-human and human mammals

Maternal interactions with young occupy most of the reproductive period for female mammals and are absolutely essential for offspring survival and development. The hormonal, sensory, reward-related, emotional, cognitive and neurobiological regulators of maternal caregiving behaviors have been well studied in numerous subprimate mammalian species, and some of the importance of this body of work is thought to be its relevance for understanding similar controls in humans. We here review many of the important biopsychological influences on maternal behaviors in the two best studied non-human animals, laboratory rats and sheep, and directly examine how the conceptual framework established by some of the major discoveries in these animal “models” do or do not hold for our understanding of human mothering. We also explore some of the limits for extrapolating from non-human animals to humans. We conclude that there are many similarities between non-human and human mothers in the biological and psychological factors influencing their early maternal behavior and that many of the differences are due to species-characteristic features related to the role of hormones, the relative importance of each sensory system, flexibility in what behaviors are exhibited, the presence or absence of language, and the complexity of cortical function influencing caregiving behaviors.     

A Thomistic understanding of human death

I investigate Thomas Aquinas's metaphysical account of human death, which is defined in terms of a rational soul separating from its material body. The question at hand concerns what criterion best determines when this separation occurs. Aquinas argues that a body has a rational soul only insofar as it is properly organised to support the soul's vegetative, sensitive, and rational capacities. According the 'higher-brain' concept of death, when a body can no longer provide the biological foundation necessary for the operation of conscious rational thought and volition, a substantial change occurs in which the rational soul departs and the body left behind is a 'humanoid animal' or a mere 'vegetable.' I argue that the separation of soul and body does not occur until the body ceases to function as a unified, integrated organism. A rational soul is not only the seat of a human being's rational capacities; it is also the principle of the body's sensitive and vegetative capacities. Since Aquinas defines a human being as a composite of soul and body, and not with merely the exercise of rational capacities, the determination of death requires incontrovertible evidence that the body has ceased all the operations that correspond to the soul's proper capacities. The evidence of this is the body's loss of its integrative organic unity and the criterion for determining when this loss occurs is the irreversible cessation of whole-brain functioning.     

Religious and secular death: a parting of the ways

Most organized religions have indicated a level of support for organ donation including the diagnosis of death by the brain criterion. Organ donation is seen as a gift of love and fits within a communitarian ethos that most religions embrace. The acceptance of the determination of death by the brain criterion, where it has been explained, is reconciled with religious views of soul and body by using a notion of integration. Because the soul may be seen as that which integrates the human body, in the absence of any other signs of human functioning, loss of integration is considered to be an indication that soul and body have separated. To some extent this view would seem to be informed by an Aristotelian notion of the soul, but it fits well enough with religious notions of the person continuing after death. There have been several developments internationally that indicate that the acceptance of so-called 'brain death' by organized religions has been challenged by new developments including the acceptance of a lesser standard than loss of all brain function and a rejection by the US President's Council on Bioethics of the notion of loss of integration as an explanation of death by the brain criterion.     

The bodily winds in ancient India revisited

This paper examines the historical development of the doctrine of the five bodily winds ( prā a s) in the early Sanskrit literature of Yoga and Āyurveda. Special attention is paid to the Indian's understanding of the connection between atmospheric wind and bodily breath and the role of wind in the human body. The paper traces the evolution of the Indian concept of breath. Originally, wind and breath were used metaphorically to indicate life. Breath was subsequently classified into five types by early ascetics who used breath-control in their practice of Yoga; and these same five breaths were eventually utilized by the Āyurvedic medical thinkers to establish a sophisticated doctrine of wind and its function in the body.     

On the lack of evidence that non-human animals possess anything remotely resembling a 'theory of mind'

After decades of effort by some of our brightest human and non-human minds, there is still little consensus on whether or not non-human animals understand anything about the unobservable mental states of other animals or even what it would mean for a non-verbal animal to understand the concept of a ‘mental state’. In the present paper, we confront four related and contentious questions head-on: (i) What exactly would it mean for a non-verbal organism to have an ‘understanding’ or a ‘representation’ of another animal''s mental state? (ii) What should (and should not) count as compelling empirical evidence that a non-verbal cognitive agent has a system for understanding or forming representations about mental states in a functionally adaptive manner? (iii) Why have the kind of experimental protocols that are currently in vogue failed to produce compelling evidence that non-human animals possess anything even remotely resembling a theory of mind? (iv) What kind of experiments could, at least in principle, provide compelling evidence for such a system in a non-verbal organism?     

Pneuma between body and soul

This paper explores the divergent ideas that different ancient Greek thinkers entertained on the nature of wind and air outside the body, on the role of breath and air within it (e.g. in causing disease), on their contribution to life and intelligence, and on the mind-body problem, where dualists who insisted that the soul is incorporeal were locked in controversy with monists who denied that. One of the distinctive features of Greek thought is its polemical nature, with rival views on offer both on substantive questions and on methodology. Alongside the speculative theories of the philosophers, there were those who tackled the problems empirically. But the advances that Galen (in particular) made in his understanding of the anatomy of the nervous and blood-vascular systems did nothing to resolve the problem of the physical basis of vital functions.     

Innovativeness as an emergent property: a new alignment of comparative and experimental research on animal innovation

Innovation and creativity are key defining features of human societies. As we face the global challenges of the twenty-first century, they are also facets upon which we must become increasingly reliant. But what makes Homo sapiens so innovative and where does our high innovation propensity come from? Comparative research on innovativeness in non-human animals allows us to peer back through evolutionary time and investigate the ecological factors that drove the evolution of innovativeness, whereas experimental research identifies and manipulates underpinning creative processes. In commenting on the present theme issue, I highlight the controversies that have typified this research field and show how a paradigmatic shift in our thinking about innovativeness will contribute to resolving these tensions. In the past decade, innovativeness has been considered by many as a trait, a direct product of cognition, and a direct target of selection. The evidence I review here suggests that innovativeness will be hereon viewed as one component, or even an emergent property of a larger array of traits, which have evolved to deal with environmental variation. I illustrate how research should capitalize on taxonomic diversity to unravel the full range of psychological processes that underpin innovativeness in non-human animals.     

Imitation and conventional communication

To the extent that language is conventional, non-verbal individuals, including human infants, must participate in conventions in order to learn to use even simple utterances of words. This raises the question of which varieties of learning could make this possible. In this paper I defend Tomasello’s (The cultural origins of human cognition. Harvard UP, Cambridge, 1999, Origins of human communication. MIT, Cambridge, 2008) claim that knowledge of linguistic conventions could be learned through imitation. This is possible because Lewisian accounts of convention have overstated what one must know to participate in conventions; and because the required knowledge could be learned imitatively. The imitation claim that I defend is consistent with what we know about both the proliferation of conventional behaviours in human children, who are skilful imitators, and the comparative absence of such behaviours in non-human great apes, who are poor at imitative learning.     

Khoisan wind: hunting and healing

In this paper I draw on my findings and those of historical and recent Khoisan ethnography to attempt to explain how these southern African 'Khoi' and San peoples relate to wind and how the environmental phenomenon has informed their epistemology and ontology. I begin by fleshing out the knowledge and experience of wind among these past and recent hunter-gatherers and, pointing to continuity in wind relationships and the ideas that stem from them, I go on to demonstrate how wind weaves into Khoisan understandings of the body and illness. Despite extensive interest in Bushman healing, anthropologists have overwhelmingly concentrated on the 'trance' healing dance. My findings suggest this partiality has obscured the wider healing context in which the dance operates. Exploring the wider context, including massage, 'medicinal cuts', and witchcraft, reveals that the 'potency' conceived as central to the healing dance is, in certain contexts, equivalent to overlapping ideas of wind, arrows, and smell. Examination of the ethnography reveals that a number of the associations I make between wind and potency have been partially recognized in specific Khoisan contexts but, because comparative studies of Khoisan are difficult and unpopular, these similarities have gone largely unnoticed.     

Personality research with non-human primates: theoretical formulation and methods

Since the earliest periods of primatology study, researchers have been aware of animals’ consistent individual differences in behavior or personality. Many papers have been published on this subject, but they lacked a common theoretical and methodological background. The present work is an attempt to provide such theoretical and methodological foundations to this field of biological science. In the theoretical formulation section, “biological study of personality” is first derived as an extension of the ethology paradigm, and non-human primate personality research is subsequently characterized as its strategic component. In the methodology section, brief reviews and discussions are presented on subjective and objective personality assessment methods with non-human primates with a reference to the reliability and validity concepts in human psychometrics. The work provides a theoretical framework and methodological suggestions for non-human primate personality research.     

Bioelectronic nose and its application to smell visualization

There have been many trials to visualize smell using various techniques in order to objectively express the smell because information obtained from the sense of smell in human is very subjective. So far, well-trained experts such as a perfumer, complex and large-scale equipment such as GC-MS, and an electronic nose have played major roles in objectively detecting and recognizing odors. Recently, an optoelectronic nose was developed to achieve this purpose, but some limitations regarding the sensitivity and the number of smells that can be visualized still persist. Since the elucidation of the olfactory mechanism, numerous researches have been accomplished for the development of a sensing device by mimicking human olfactory system. Engineered olfactory cells were constructed to mimic the human olfactory system, and the use of engineered olfactory cells for smell visualization has been attempted with the use of various methods such as calcium imaging, CRE reporter assay, BRET, and membrane potential assay; however, it is not easy to consistently control the condition of cells and it is impossible to detect low odorant concentration. Recently, the bioelectronic nose was developed, and much improved along with the improvement of nano-biotechnology. The bioelectronic nose consists of the following two parts: primary transducer and secondary transducer. Biological materials as a primary transducer improved the selectivity of the sensor, and nanomaterials as a secondary transducer increased the sensitivity. Especially, the bioelectronic noses using various nanomaterials combined with human olfactory receptors or nanovesicles derived from engineered olfactory cells have a potential which can detect almost all of the smells recognized by human because an engineered olfactory cell might be able to express any human olfactory receptor as well as can mimic human olfactory system. Therefore, bioelectronic nose will be a potent tool for smell visualization, but only if two technologies are completed. First, a multi-channel array-sensing system has to be applied for the integration of all of the olfactory receptors into a single chip for mimicking the performance of human nose. Second, the processing technique of the multi-channel system signals should be simultaneously established with the conversion of the signals to visual images. With the use of this latest sensing technology, the realization of a proper smell-visualization technology is expected in the near future.     

Activation of Anopheles gambiae mosquitoes by carbon dioxide and human breath

Abstract. Female Anopheles gambiae Giles mosquitoes were observed individually in a cage within a wind tunnel and their responses to pulses of carbon dioxide recorded on video tape. The range of concentrations tested revealed an 'activation' threshold concentration of carbon dioxide in the region of 0.01% above background. At this concentration, approximately 60% of the mosquitoes took off and flew upwind. Pulses of human breath, diluted with wind tunnel air to reproduce equivalent concentrations of carbon dioxide, elicited similar levels of response and the same 'activation' threshold concentration. These findings are discussed in relation to the activation of host-seeking mosquitoes.     

Focus: Zoonotic Disease: An Ecologically Framed Comparison of The Potential for Zoonotic Transmission of Non-Human and Human-Infecting Species of Malaria Parasite

The threats, both real and perceived, surrounding the development of new and emerging infectious diseases of humans are of critical concern to public health and well-being. Among these risks is the potential for zoonotic transmission to humans of species of the malaria parasite, Plasmodium, that have been considered historically to infect exclusively non-human hosts. Recently observed shifts in the mode, transmission, and presentation of malaria among several species studied are evidenced by shared vectors, atypical symptoms, and novel host-seeking behavior. Collectively, these changes indicate the presence of environmental and ecological pressures that are likely to influence the dynamics of these parasite life cycles and physiological make-up. These may be further affected and amplified by such factors as increased urban development and accelerated rate of climate change. In particular, the extended host-seeking behavior of what were once considered non-human malaria species indicates the specialist niche of human malaria parasites is not a limiting factor that drives the success of blood-borne parasites. While zoonotic transmission of non-human malaria parasites is generally considered to not be possible for the vast majority of Plasmodium species, failure to consider the feasibility of its occurrence may lead to the emergence of a potentially life-threatening blood-borne disease of humans. Here, we argue that recent trends in behavior among what were hitherto considered to be non-human malaria parasites to infect humans call for a cross-disciplinary, ecologically-focused approach to understanding the complexities of the vertebrate host/mosquito vector/malaria parasite triangular relationship. This highlights a pressing need to conduct a multi-species investigation for which we recommend the construction of a database to determine ecological differences among all known Plasmodium species, vectors, and hosts. Closing this knowledge gap may help to inform alternative means of malaria prevention and control.