Functional networks for peripersonal space coding and prediction of impact to the body

2021 ◽  
pp. 61-80
Author(s):  
Justine Cléry ◽  
Suliann Ben Hamed
Keyword(s):  
Functional Role ◽  
Body Representation ◽  
Peripersonal Space ◽  
The Body ◽  
Functional Networks ◽  
Functional Perspective ◽  
Internal States ◽  
Definition Of ◽  
Safety Boundary ◽  
Space Coding

Peripersonal space is defined as the space surrounding the body, which we can interact with and act upon. It has been hypothesized to play a key functional role in body representation and in the definition of a safety boundary around the body. More recently, growing evidence suggests that this space is dynamically resized both as a function of internal states such as anxiety or as a function of external contingencies such as social interactions or goal-directed actions. In the following review, we will review seminal and recent work in both human and non-human primates, describing the functional cortical networks involved in the coding of body margin (the skin), peripersonal space (around the body) and far space (away from the body), and we will describe how these networks are recruited during the prediction of an impact to the body (near the skin). We will propose a functional perspective to recent evidence for multiple behaviourally dissociable peripersonal spaces, and discuss the putative neuronal and network mechanisms that could account for the observed dynamic resizing of peripersonal space.

scholarly journals Remote hand: Hand-centered peripersonal space transfers to a disconnected hand avatar

2021 ◽  
Author(s):  
Daisuke Mine ◽  
Kazuhiko Yokosawa
Keyword(s):  
Virtual Environment ◽  
Body Representation ◽  
Peripersonal Space ◽  
The Body ◽  
The Real ◽  
Novel Technique ◽  
Near Space ◽  
Behavioral Evidence ◽  
Real Hand

The space surrounding our body is called peripersonal space (PPS). It has been reported that visuo-tactile facilitation occurs more strongly within PPS than outside PPS. Furthermore, previous research has revealed several methods by which PPS can be extended. The present study provides the first behavioral evidence of the transfer of PPS in a virtual environment by a novel technique. PPS representation was investigated using a remote-controlled hand avatar presented far from their body in a virtual environment. Participants showed strongest visuo-tactile facilitation at the far space around the remote hand and no facilitation at the near space around the real hand, suggesting that PPS transfers from near the body to the space around the hand avatar. The present results extend previous findings of the plasticity of PPS and demonstrate flexibility of PPS representation beyond the physical and anatomical limits of body representation.

Individual Differences in the Flexibility of Peripersonal Space

2017 ◽  
Vol 64 (1) ◽  
pp. 49-55 ◽  
Author(s):  
Samuel B. Hunley ◽  
Arwen M. Marker ◽  
Stella F. Lourenco
Keyword(s):  
Individual Differences ◽  
Peripersonal Space ◽  
The Body ◽  
Laser Pointer ◽  
Baseline Measure ◽  
Bisection Task ◽  
Defensive Function ◽  
Representational Space ◽  
Laser Condition ◽  
Line Bisection Task

Abstract. The current study investigated individual differences in the flexibility of peripersonal space (i.e., representational space near the body), specifically in relation to trait claustrophobic fear (i.e., fear of suffocating or being physically restricted). Participants completed a line bisection task with either a laser pointer (Laser condition), allowing for a baseline measure of the size of one’s peripersonal space, or a stick (Stick condition), which produces expansion of one’s peripersonal space. Our results revealed that individuals high in claustrophobic fear had larger peripersonal spaces than those lower in claustrophobic fear, replicating previous research. We also found that, whereas individuals low in claustrophobic fear demonstrated the expected expansion of peripersonal space in the Stick condition, individuals high in claustrophobic fear showed less expansion, suggesting decreased flexibility. We discuss these findings in relation to the defensive function of peripersonal space and reduced attentional flexibility associated with trait anxieties.

Derrida on Pornography: Putting (It) Up for Sale

Derrida Today ◽  
2013 ◽  
Vol 6 (1) ◽  
pp. 97-114 ◽  
Author(s):  
Christopher Morris
Keyword(s):  
Cultural Studies ◽  
English Translation ◽  
The Body ◽  
The Past ◽  
French Original ◽  
Definition Of ◽  
Critical Discourses ◽  
Academic Debate

Over the past thirty years, academic debate over pornography in the discourses of feminism and cultural studies has foundered on questions of the performative and of the word's definition. In the polylogue of Droit de regards, pornography is defined as la mise en vente that is taking place in the act of exegesis in progress. (Wills's idiomatic English translation includes an ‘it’ that is absent in the French original). The definition in Droit de regards alludes to the word's etymology (writing by or about prostitutes) but leaves the referent of the ‘sale’ suspended. Pornography as la mise en vente boldly restates the necessary iterability of the sign and anticipates two of Derrida's late arguments: that there is no ‘the’ body and that performatives may be powerless. Deriving a definition of pornography from a truncated etymology exemplifies the prosthesis of origin and challenges other critical discourses to explain how pornography can be understood as anything more than ‘putting (it) up for sale’.

scholarly journals Zur exakten Behandlung von kollektiven Rotationen Teil A: Theorie / On the Exact Treatment of Collective Rotations Part A: Theory

1973 ◽  
Vol 28 (2) ◽  
pp. 206-215
Author(s):  
Hanns Ruder
Keyword(s):  
Coordinate System ◽  
Perturbation Expansion ◽  
Rotational Energy ◽  
The Body ◽  
System A ◽  
N Body Problem ◽  
Definition Of ◽  
Fixed System ◽  
Body Fixed Coordinate System ◽  
Groundstate Energy

Basic in the treatment of collective rotations is the definition of a body-fixed coordinate system. A kinematical method is derived to obtain the Hamiltonian of a n-body problem for a given definition of the body-fixed system. From this exact Hamiltonian, a consequent perturbation expansion in terms of the total angular momentum leads to two exact expressions: one for the collective rotational energy which has to be added to the groundstate energy in this order of perturbation and a second one for the effective inertia tensor in the groundstate. The discussion of these results leads to two criteria how to define the best body-fixed coordinate system, namely a differential equation and a variational principle. The equivalence of both is shown.

scholarly journals Spiritual nursing care: A concept analysis

Curationis ◽  
2012 ◽  
Vol 35 (1) ◽  
Author(s):  
Lydia V. Monareng
Keyword(s):  
Nursing Care ◽  
Concept Analysis ◽  
Operational Definition ◽  
The Body ◽  
Empirical Literature ◽  
Spiritual Needs ◽  
Optimal Care ◽  
Health Crisis ◽  
Group Interviews ◽  
Definition Of

Although the concept ‘spiritual nursing care’ has its roots in the history of the nursing profession, many nurses in practice have difficulty integrating the concept into practice. There is an ongoing debate in the empirical literature about its definition, clarity and application in nursing practice. The study aimed to develop an operational definition of the concept and its application in clinical practice. A qualitative study was conducted to explore and describe how professional nurses render spiritual nursing care. A purposive sampling method was used to recruit the sample. Individual and focus group interviews were audio-taped and transcribed verbatim. Trustworthiness was ensured through strategies of truth value, applicability, consistency and neutrality. Data were analysed using the NUD*IST power version 4 software, constant comparison, open, axial and selective coding. Tech’s eight steps of analysis were also used, which led to the emergence of themes, categories and sub-categories. Concept analysis was conducted through a comprehensive literature review and as a result ‘caring presence’ was identified as the core variable from which all the other characteristics of spiritual nursing care arise. An operational definition of spiritual nursing care based on the findings was that humane care is demonstrated by showing caring presence, respect and concern for meeting the needs not only of the body and mind of patients, but also their spiritual needs of hope and meaning in the midst of health crisis, which demand equal attention for optimal care from both religious and nonreligious nurses.

The Role of Hand Size in the Fake-Hand Illusion Paradigm

Perception ◽  
10.1068/p5853 ◽  
2007 ◽  
Vol 36 (10) ◽  
pp. 1547-1554 ◽  
Author(s):  
Francesco Pavani ◽  
Massimiliano Zampini
Keyword(s):  
Body Image ◽  
Body Schema ◽  
Body Representation ◽  
The Body ◽  
Video Image ◽  
Body Parts ◽  
Statistical Correlations ◽  
Hand Size ◽  
Visible Hand

When a hand (either real or fake) is stimulated in synchrony with our own hand concealed from view, the felt position of our own hand can be biased toward the location of the seen hand. This intriguing phenomenon relies on the brain's ability to detect statistical correlations in the multisensory inputs (ie visual, tactile, and proprioceptive), but it is also modulated by the pre-existing representation of one's own body. Nonetheless, researchers appear to have accepted the assumption that the size of the seen hand does not matter for this illusion to occur. Here we used a real-time video image of the participant's own hand to elicit the illusion, but we varied the hand size in the video image so that the seen hand was either reduced, veridical, or enlarged in comparison to the participant's own hand. The results showed that visible-hand size modulated the illusion, which was present for veridical and enlarged images of the hand, but absent when the visible hand was reduced. These findings indicate that very specific aspects of our own body image (ie hand size) can constrain the multisensory modulation of the body schema highlighted by the fake-hand illusion paradigm. In addition, they suggest an asymmetric tendency to acknowledge enlarged (but not reduced) images of body parts within our body representation.

scholarly journals A global framework for a systemic view of brain modeling

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Frederic Alexandre
Keyword(s):  
Instrumental Conditioning ◽  
The Body ◽  
Posterior Cortex ◽  
Reciprocal Relationships ◽  
Brain Modeling ◽  
Brain Theory ◽  
Habitual Behavior ◽  
Definition Of ◽  
The Brain ◽  
Specific Contribution

AbstractThe brain is a complex system, due to the heterogeneity of its structure, the diversity of the functions in which it participates and to its reciprocal relationships with the body and the environment. A systemic description of the brain is presented here, as a contribution to developing a brain theory and as a general framework where specific models in computational neuroscience can be integrated and associated with global information flows and cognitive functions. In an enactive view, this framework integrates the fundamental organization of the brain in sensorimotor loops with the internal and the external worlds, answering four fundamental questions (what, why, where and how). Our survival-oriented definition of behavior gives a prominent role to pavlovian and instrumental conditioning, augmented during phylogeny by the specific contribution of other kinds of learning, related to semantic memory in the posterior cortex, episodic memory in the hippocampus and working memory in the frontal cortex. This framework highlights that responses can be prepared in different ways, from pavlovian reflexes and habitual behavior to deliberations for goal-directed planning and reasoning, and explains that these different kinds of responses coexist, collaborate and compete for the control of behavior. It also lays emphasis on the fact that cognition can be described as a dynamical system of interacting memories, some acting to provide information to others, to replace them when they are not efficient enough, or to help for their improvement. Describing the brain as an architecture of learning systems has also strong implications in Machine Learning. Our biologically informed view of pavlovian and instrumental conditioning can be very precious to revisit classical Reinforcement Learning and provide a basis to ensure really autonomous learning.

The Meaning of Pain and the Pain of Meaning: A Bio-Hermeneutical Inquiry

2021 ◽  
Vol 90 ◽  
pp. 215-234
Author(s):  
Teodora Manea
Keyword(s):  
The Body ◽  
Main Interest ◽  
Main Approach ◽  
Memento Mori ◽  
Finding Meaning ◽  
Pace Of Life ◽  
Before And After ◽  
Definition Of

AbstractMy main interest here is to look at pain as a sign of the body that something is wrong. I will argue that there is a meaning of pain before and after an illness is diagnosed. An illness contains its own semantic paradigm, but the pain before the diagnosis affects the pace of life, not only by limiting our interactions, but also as a struggle with its meaning and a reminder of mortality.My main approach is what I call bio-hermeneutics, an extension of medical hermeneutics branching out from the Continental hermeneutical tradition. As such, I will explore the connection between pain and language, temporality, dialectics, and ontology. Given the centrality of language in constructing the meaning of pain, my analysis is informed by the semantics (looking at pain metaphors), syntax (pain as incoherence), and pragmatics (pain as companion) of expressing pain.The last section explores the meaning of pain in connection with death, as memento mori. Revisiting an old definition of philosophy as melete thanatou, or ‘rehearsal of death’, I will reflect on the difficulty of finding meaning not only for pain, but also for death as cessation of all existential possibilities.

Bodily Dasein and Chinese Script Components

2017 ◽  
Vol 2017 (2) ◽  
Author(s):  
Kwan Tze-wan
Keyword(s):  
Human Body ◽  
The Body ◽  
Chinese Script ◽  
Chinese Characters ◽  
Body Parts ◽  
Constitutive Principle ◽  
New Perspective ◽  
Social Environmental ◽  
The One ◽  
Definition Of

AbstractIn the Shuowen, one of the earliest comprehensive character dictionaries of ancient China, when discussing where the Chinese characters derive their structural components, Xu Shen proposed the dual constitutive principle of “adopting proximally from the human body, and distally from things around.” This dual emphasis of “body” and “things around” corresponds largely to the phenomenological issues of body or corporeality on the one hand, and lifeworld on the other. If we borrow Heidegger’s definition of Dasein as Being-in-the world, we can easily arrive at a reformulation of Xu Shen’s constitutive principle of the Chinese script as one that concerns “bodily Dasein.” By looking into various examples of script tokens we can further elaborate on how the Chinese make use not only of the body in general but various body parts, and how they differentiate their life world into material nature, living things, and a multifaceted world of equipment in forming a core basis of Chinese characters/components, upon which further symbolic manipulation such as “indication”, “phonetic borrowing”, semantic combination, and “annotative derivation”, etc. can be based. Finally, examples will be cited to show how in the Chinese scripts the human body (and its parts) might interact with other’s bodies (and their parts) or with “things around” (whether nature, living creatures, or artifacts) in various ways to cover the social, environmental, ritual, technical, economical, and even intellectual aspects of human experience. Bodily Dasein, so to speak, provides us with a new perspective of understanding and appreciating the entire scope of the Chinese script.

In the Blink of an Eye

2016 ◽  
pp. 166-186
Author(s):  
Alanna Thain
Keyword(s):  
The Body ◽  
Stop Motion ◽  
Definition Of ◽  
Action Cinema ◽  
Live Action ◽  
The Invisible

Canadian animator Norman McLaren claims that “animation is not the art of drawings that move but the art of movements that are drawn; what happens between each frame is much more important than what exists on each frame; animation is therefore the art of manipulating the invisible interstices that lie between the frames.” That has remained the default definition of animation since he first proposed it. Between the frames lie the alchemical transformations of animation and live-action cinema that exceed the still, photographed images. McLaren’s emphasis on the in-between may explain why his work involves stop-motion animation and was so strongly influenced by dance. Through consideration of McLaren’s collaborations with dancers in Ballet Adagio and Pas de Deux, but especially the aberrant movement and nonhuman dance of his A Chairy Tale, McLaren’s ability to animate change itself links dance’s potential for animation and animation’s ability to bring to screendance new potentials of the body.

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