Understanding the Role of the Clitellum in the Regeneration Events of the Earthworm Eudrilus eugeniae

2019 ◽  
Vol 208 (3-4) ◽  
pp. 134-141
Author(s):  
Jackson Durairaj Selvan Christyraj ◽  
Ananthaselvam Azhagesan ◽  
Mijithra Ganesan ◽  
Karthikeyan Subbiah Nadar Chelladurai ◽  
Vennila Devi Paulraj ◽  
...  
Keyword(s):  
Regeneration Ability ◽  
Body Parts ◽  
Differentiation Process ◽  
Eudrilus Eugeniae ◽  
Complex Mechanism ◽  
Gut Epithelium ◽  
Regeneration Mechanism ◽  
Regeneration Capability ◽  
Regeneration Blastema

Regeneration is a complex mechanism to restore lost or damaged body parts. In earthworms, regeneration capability varies among different species, and it is important to explore the mechanism behind the regeneration process. Interestingly, regeneration in earthworms is either dependent or independent of clitellum segments. In the present study, juvenile earthworms (Eudrilus eugeniae) were amputated at 3 different sites, namely the head, clitellum, and tail segments (at segments 10, 15, and 30, respectively), and their regeneration ability was documented using a foldscope. The amputated segments having the intact clitellum were able to heal the wounds and form the regenerative blastema. The smaller portions of the amputated segments (segments 1–10 and 1–15) without intact clitellum were unable to heal the wound, and death occurs within 12–24 h. The larger portions of the amputated segments (segments 15 and 30 to anus) without intact clitellum were able to heal the wound but lacked the regeneration capability. In control worms, alkaline phosphatase (ALP) signals were observed at the anterior tip, clitellum, and gut epithelium tissues, whereas, upon amputation, the enriched signals from the clitellum diminished, but profound signals were observed at the amputation site and regenerative blastema. Interestingly, on days 3 and 4, blastemal tips lacked ALP signals due to initiation of the differentiation process in the regeneration blastema. In summary, using a foldscope microscope, the role of the clitellum in the regeneration mechanism was indicated by ALP activity.

Epigenetic Regulator Signatures in Regenerative Capacity

2019 ◽  
Vol 14 (7) ◽  
pp. 598-606
Author(s):  
Sarah Albogami
Keyword(s):  
Epigenetic Regulation ◽  
Animal Species ◽  
Current Knowledge ◽  
Regeneration Process ◽  
Body Parts ◽  
Lysine Methylation ◽  
Regenerative Capacity ◽  
Biological Phenomena ◽  
Epigenetic Regulator

Background:: Regeneration is the process by which body parts lost as a result of injury are replaced, as observed in certain animal species. The root of regenerative differences between organisms is still not very well understood; if regeneration merely recycles developmental pathways in the adult form, why can some animals regrow organs whereas others cannot? In the regulation of the regeneration process as well as other biological phenomena, epigenetics plays an essential role. Objective:: This review aims to demonstrate the role of epigenetic regulators in determining regenerative capacity. Results:: In this review, we discuss the basis of regenerative differences between organisms. In addition, we present the current knowledge on the role of epigenetic regulation in regeneration, including DNA methylation, histone modification, lysine methylation, lysine methyltransferases, and the SET1 family. Conclusion:: An improved understanding of the regeneration process and the epigenetic regulation thereof through the study of regeneration in highly regenerative species will help in the field of regenerative medicine in future.

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.

Beyond anthropomorphism: Odissi and the botanical

2012 ◽  
Vol 4 (2) ◽  
pp. 157-165
Author(s):  
Sally Gardner
Keyword(s):  
Body Schema ◽  
Contemporary Dance ◽  
Body Parts ◽  
Bharata Natyam ◽  
Indian Dance ◽  
The Difference ◽  
Tribal Cultures ◽  
Cultural Body

Drawing on experiences that have entailed watching and learning forms of so-called ‘Indian dance’ (Bharata Natyam and Odissi), and watching Odissi dancers performing in various locations in Orissa’s ‘sacred triangle’ (Puri, Konark, Bhubaneswar), and against my own background in contemporary dance, I propose that the difference of the Odissi body is that the dancer dances with his or her feet in more than one kingdom – that is, he or she maintains a link between human bodies and the bodies of plants. Such a perception can help to displace questions of the dancer’s spatiality and representations, challenging western or westernized visions of the industrial or mechanical body, assumed hierarchies of body parts and their signifying powers, and assumptions about the role of the joints. The sense of a botanical imaginary or specific cultural body-schema at work in Odissi dance is supported by discussion of historical and ethnographic literature pertaining to the (former) female dancers of the Jagannath Temple in Puri; the temple’s links with Oriyan tribal cultures; the dancers’ traditional importance according to an axis of social auspiciousness/inauspiciousness as opposed to social purity/impurity; and the particular processes of the reconstruction of Odissi dance (separate from that of Bharata natyam) after independence.

Role of putrescine metabolic pathways in the differentiation process of maize meristematic callus

1998 ◽  
Vol 36 (10) ◽  
pp. 759-766 ◽  
Author(s):  
Esmaragda Bernet ◽  
Inmaculada Claparols ◽  
Ma Asunción Santos ◽  
Josep Ma Torné
Keyword(s):  
Metabolic Pathways ◽  
Differentiation Process

scholarly journals Biomechanical trade-offs bias rates of evolution in the feeding apparatus of fishes

2011 ◽  
Vol 279 (1732) ◽  
pp. 1287-1292 ◽  
Author(s):  
Roi Holzman ◽  
David C. Collar ◽  
Samantha A. Price ◽  
C. Darrin Hulsey ◽  
Robert C. Thomson ◽  
...  
Keyword(s):  
Genetic Factors ◽  
Morphological Evolution ◽  
The Body ◽  
Body Parts ◽  
Phenotypic Evolution ◽  
Genetic Constraints ◽  
Functional Systems ◽  
Rates Of Evolution ◽  
Trade Offs

Morphological diversification does not proceed evenly across the organism. Some body parts tend to evolve at higher rates than others, and these rate biases are often attributed to sexual and natural selection or to genetic constraints. We hypothesized that variation in the rates of morphological evolution among body parts could also be related to the performance consequences of the functional systems that make up the body. Specifically, we tested the widely held expectation that the rate of evolution for a trait is negatively correlated with the strength of biomechanical trade-offs to which it is exposed. We quantified the magnitude of trade-offs acting on the morphological components of three feeding-related functional systems in four radiations of teleost fishes. After accounting for differences in the rates of morphological evolution between radiations, we found that traits that contribute more to performance trade-offs tend to evolve more rapidly, contrary to the prediction. While ecological and genetic factors are known to have strong effects on rates of phenotypic evolution, this study highlights the role of the biomechanical architecture of functional systems in biasing the rates and direction of trait evolution.

Body Schema and Body Image

2021 ◽  
Keyword(s):  
Body Image ◽  
Body Dysmorphic Disorder ◽  
Body Schema ◽  
The Body ◽  
Body Parts ◽  
Neural Activities ◽  
Body Shapes ◽  
Influential Book ◽  
Social And Cultural Factors

Body schema refers to the system of sensory-motor functions that enables control of the position of body parts in space, without conscious awareness of those parts. Body image refers to a conscious representation of the way the body appears—a set of conscious perceptions, affective attitudes, and beliefs pertaining to one’s own bodily image. In 2005, Shaun Gallagher published an influential book entitled ‘How the Body Shapes the Mind’. This book not only defined both body schema (BS) and body image (BI), but also explored the complicated relationship between the two. The book also established the idea that there is a double dissociation, whereby body schema and body image refer to two different, but closely related, systems. Given that many kinds of pathological cases can be described in terms of body schema and body image (phantom limbs, asomatognosia, apraxia, schizophrenia, anorexia, depersonalization, and body dysmorphic disorder, among others), we might expect to find a growing consensus about these concepts and the relevant neural activities connected to these systems. Instead, an examination of the scientific literature reveals continued ambiguity and disagreement. This volume brings together leading experts from the fields of philosophy, neuroscience, psychology, and psychiatry in a lively and productive dialogue. It explores fundamental questions about the relationship between body schema and body image, and addresses ongoing debates about the role of the brain and the role of social and cultural factors in our understanding of embodiment.

Be happy when your stomach is

2020 ◽  
Vol 27 (1) ◽  
pp. 184-208
Author(s):  
Dorothea Hoffmann
Keyword(s):  
Personality Traits ◽  
Body Part ◽  
Body Parts ◽  
States Of Mind ◽  
Basic Emotions ◽  
Semantic Domain ◽  
Noun Incorporation ◽  
Closed Class ◽  
River Region

Abstract In this paper I provide a description of the role of body-part terms in expressions of emotion and other semantic extensions in MalakMalak, a non-Pama-Nyungan language of the Daly River area. Body-based expressions denote events, emotions, personality traits, significant places and people and are used to refer to times and number. Particularly central in the language are men ‘stomach’, pundu ‘head’ and tjewurr ‘ear’ associated respectively with basic emotions, states of mind and reason. The figurative extensions of these body parts are discussed systematically, and compared with what is known for other languages of the Daly River region. The article also explores the grammatical make up of body-based emotional collocations, and in particular the role of noun incorporation. In MalakMalak, noun incorporation is a central part of forming predicates with body parts, but uncommon in any other semantic domain of the language and only lexemes denoting basic emotions may also incorporate closed-class adjectives.

scholarly journals On metaphorical designation of humans, animals, plants and things in Serbian and English language

2004 ◽  
pp. 147-176
Author(s):  
Stanimir Rakic
Keyword(s):  
English Language ◽  
The Body ◽  
Symbolic Meaning ◽  
Body Parts ◽  
Human Beings ◽  
Social Functions ◽  
Compound Nouns ◽  
Derivatives Of

In this paper I examine compound names of plants, animals, human beings and other things in which at least one nominal component designates a part of the body or clothes, or some basic elements of houshold in Serbian and English. The object of my analysis are complex derivatives of the type (adjective noun) + suffix in Serbian and componds of the type noun's + noun, noun + noun and adjective + noun in English. I try to show that there is a difference in metaphorical designation of human beings and other living creatures and things by such compound nouns. My thesis is that the metathorical designation of human beings by such compounds is based on the symbolic meaning of some words and expressions while the designation of other things and beings relies on noticed similarity. In Serbian language such designation is provided by comples derivatives praznoglavac 'empty-headed person', tupoglavac 'dullard' debolokoiac 'callos person', golobradac 'young, inexperienced person' zutokljunac 'tledling' (fig), in English chicken liver, beetle brain birdbrain, bonehead, butterfingers, bigwig, blackleg, blue blood bluestocking, eat's paw, deadhead,fat-guts,fathead, goldbrick (kol) hardhat, hardhead, greenhorn, redcoat (ist), redneck (sl), thickhead, etc. Polisemous compounds like eat's paw lend support for this thesis because their designation of human beings is based on symbolic meaning of some words or expressions. I hypothesize that the direction and extend of the possible metaphorization of names may be accounted for by the following hierarchy (11) people - animals - plants - meterial things. Such hierarchy is well supported by the observations of Lakoff (1987) and Taylor (1995) about the role of human body in early experience and perception ofthe reality. Different restrictions which may be imposed in the hierarchy (11) should be the matter of further study, some of which have been noted on this paper. The compounds of this type denoting people have metaphorically meaning conected with some pejorative uses. These compounds refer to some psychological or characteral features, and show that for the classification of people such features are much more important than physical properties. While the animals and plants are classified according to some charecteristics of their body parts, people are usually classified according to psychollogical characteristics or their social functions. I have also noted a difference in structure between compounds designation animals and those designating plants and other things. The designation of animals relies more on metonymy, and that of plants and other things on metaphor based on comparision of noticed similarities. In the compounds designating animals, the nominal component relatively seldom refers to the parts of plants or other things. I guess that the cause may be the fact that the anatomy of plants is very different from the anatomy of animals. As a consequence the structure adjective + noun is much more characteristic of the compounds designating animals in English than the structure noun's + noun, and the same holds, although in a lesser degree for the compounds designating humans. It is also noticeable that in English compounds whose second component a part of body or clothes the first component rarely designates animals. On the other hand the compounds (9), in which the nominal head refers to some superordinate species, the first component often designates animal species, but usually of a very different kind. These data seem to lend support for Goldvarg & Gluksberg's thesis (1998) that metaforical interpretation is favoured if the nominal constituents denote quite different entities.

scholarly journals Peran Caregiver Dalam Mengenalkan Anggota Tubuh Pada Individu Autistik Usia Prasekolah

2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Diah Retno Anggraini
Keyword(s):  
Sex Education ◽  
Sexual Exploitation ◽  
First Year ◽  
Body Parts ◽  
Autistic Children ◽  
Study Approach ◽  
Special Challenge ◽  
The Right ◽  
Independent Behavior

<em>It is estimated that around 40,000-70,000 children become victims of sexual exploitation and about 100,000 children are trafficked each year. It clearly proves the children’s lack of knowledge about sex education they should have gained in their first year from their caregivers, in this case their mothers. Entering the age of 1-2, children’s curiosity and ability to speak and to remember begin to increase quite well. This is the right time to continuously enrich their vocabularies and hone their ability to remember and speak by introducing body parts like hair, nose, knees, heels, and so on. Autism is a term used to describe a type of pervasive disorder in a child resulting in a disturbance or delay in cognition, language, behavior, communication and social interaction. Providing education and understanding is a special challenge for caregivers. This study illustrates how the role performed and displayed by the caregiver (mother) of autistic individuals in introducing the parts of body. The method used in the study is a qualitative method with case study approach by conducting observation and interview with the caregiver of autistic children. The result of the study indicates that the full role of caregiver (mother) produces autistic children with independent behavior. They can understand their body parts, maintain the hygiene of body parts and understand what body parts that may be touched and not</em>

scholarly journals The role of proteinase enzymes in the process of conversion of muscle to meat

2006 ◽  
Vol 60 (3-4) ◽  
pp. 195-206
Author(s):  
Emek Dümen
Keyword(s):  
Post Mortem ◽  
Complex Mechanism ◽  
Calcium Dependent ◽  
Lysosomal Proteinases ◽  
Meat Tenderization

Post mortem meat tenderization is a complex mechanism and unfortunately it has not been fully identified scientifically. It is known that endogenous proteinases have an important role in this mechanism. Detailed studies are being performed about the destructive effects of lysosomal proteinases and calcium dependent proteinases on the myofibrils and these are most common topics that are being investigated about meat tenderization processes by the scientists. The aim of this paper is to review the role of proteinase enzymes in the process of conversion of muscle to meat. .

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