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https://www.readbyqxmd.com/read/27924573/3d-organotypic-culture-model-to-study-components-of-erk-signaling
#1
Athina-Myrto Chioni, Rabia Tayba Bajwa, Richard Grose
Organotypic models are 3D in vitro representations of an in vivo environment. Their complexity can range from an epidermal replica to the establishment of a cancer microenvironment. These models have been used for many years, in an attempt to mimic the structure and function of cells and tissues found inside the body. Methods for developing 3D organotypic models differ according to the tissue of interest and the experimental design. For example, cultures may be grown submerged in culture medium and or at an air-liquid interface...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27917118/no-correlation-between-distorted-body-representations-underlying-tactile-distance-perception-and-position-sense
#2
Matthew R Longo, Rosa Morcom
Both tactile distance perception and position sense are believed to require that immediate afferent signals be referenced to a stored representation of body size and shape (the body model). For both of these abilities, recent studies have reported that the stored body representations involved are highly distorted, at least in the case of the hand, with the hand dorsum represented as wider and squatter than it actually is. Here, we investigated whether individual differences in the magnitude of these distortions are shared between tactile distance perception and position sense, as would be predicted by the hypothesis that a single distorted body model underlies both tasks...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27914882/representation-of-the-body-in-the-lateral-striatum-of-the-freely-moving-rat-fast-spiking-interneurons-respond-to-stimulation-of-individual-body-parts
#3
Julianna Kulik, Anthony Pawlak, Manraj Kalkat, Kevin Coffey, Mark O West
: Numerous studies have shown that certain types of striatal interneurons play a crucial role in selection and regulation of striatal output. Striatal Fast-Spiking Interneurons (FSIs) are parvalbumin positive, GABAergic interneurons that constitute less than 1% of the total striatal population. It is becoming increasingly evident that these sparsely distributed neurons exert a strong inhibitory effect on Medium Spiny projection Neurons (MSNs). MSNs in lateral striatum receive direct synaptic input from regions of cortex representing discrete body parts, and show phasic increases in activity during touch or movement of specific body parts...
November 30, 2016: Brain Research
https://www.readbyqxmd.com/read/27913588/action-categories-in-lateral-occipitotemporal-cortex-are-organized-along-sociality-and-transitivity
#4
Moritz F Wurm, Alfonso Caramazza, Angelika Lingnau
: How neural specificity for distinct conceptual knowledge categories arises is central for understanding the organization of semantic memory in the human brain. While there is a large body of research on the neural processing of distinct object categories, the organization of action categories remains largely unknown. In particular, it is unknown if different action categories follow a specific topographical organization on the cortical surface, analogously to the category-specific organization of object knowledge...
December 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27912194/a-model-driven-approach-to-studying-dissociations-between-body-size-mental-representations-in-anorexia-nervosa
#5
Anne-Laure Moscone, Michel-Ange Amorim, Christine Le Scanff, Pascale Leconte
This study compared dissociations between mental representations of current, ideal and normal body sizes (i.e., Current BS, Ideal BS and Normal BS) for women with anorexia nervosa (AN group, n=56) and healthy women (control group, n=56). Along the lines of the single channel model of Cornelissen et al. (2013), the discrepancy between Current BS and BMI for both groups was adequately described along a common linear continuum of Current BS (mis)perception. Body size mental representations were ranked similarly (Ideal BS<Current BS<Normal BS) in each group...
November 29, 2016: Body Image
https://www.readbyqxmd.com/read/27911020/changes-in-resting-state-connectivity-in-musicians-with-embouchure-dystonia
#6
Bernhard Haslinger, Jonas Noé, Eckart Altenmüller, Valentin Riedl, Claus Zimmer, Tobias Mantel, Christian Dresel
OBJECTIVE: Embouchure dystonia is a highly disabling task-specific dystonia in professional brass musicians leading to spasms of perioral muscles while playing the instrument. As they are asymptomatic at rest, resting-state functional magnetic resonance imaging in these patients can reveal changes in functional connectivity within and between brain networks independent from dystonic symptoms. METHODS: We therefore compared embouchure dystonia patients to healthy musicians with resting-state functional magnetic resonance imaging in combination with independent component analyses...
December 2, 2016: Movement Disorders: Official Journal of the Movement Disorder Society
https://www.readbyqxmd.com/read/27910737/a-case-of-pure-autotopagnosia-following-creutzfeldt-jakob-disease
#7
Itaru Tamura, Shinsuke Hamada, Hiroyuki Soma, Fumio Moriwaka, Kunio Tashiro
A 69-year-old male (N.A.) with Creutzfeldt-Jakob disease showed pure autotopagnosia. We administered tests evaluating his ability to name his own body parts, to point to body parts (his own and examiner's), and to recognize positional relationships between his body parts by verbal questions and responses. We found impaired localization of the patient's own body parts by pointing and impaired recognition of positional relationships between his body parts. However, there was no impairment in naming his own body parts or in localizing the examiner's body parts...
December 2, 2016: Cognitive Neuropsychology
https://www.readbyqxmd.com/read/27910201/meal-insulin-cycle-a-visual-summary-of-the-biochemical-events-between-meals
#8
Stavros Kalogiannis
In the present article, a scheme that summarizes the biochemical events occurring in the human body after the consumption of a meal is proposed. The scheme illustrates the metabolic sequence as a series of counteracting components occupying opposite positions in a cycle, indicating their opposite actions or physiological states, such as meal versus energy consumption, increase versus decrease of blood glucose levels, and excretion of insulin versus excretion of glucagon. Furthermore, the cycle is complemented by a table indicating the acceleration or inhibition of selected metabolic pathways and actions...
December 2, 2016: Biochemistry and Molecular Biology Education
https://www.readbyqxmd.com/read/27908105/role-of-sharp-avoided-crossings-in-short-hyper-radial-range-in-recombination-of-the-cold-4-he3-system
#9
Bin-Bin Wang, Yong-Chang Han, Shu-Lin Cong
The role of sharp avoided crossings (SACs) in a short hyper-radial range R≤ 50 a.u. in the calculation of recombination for a cold (4)He3 system is investigated in the adiabatic hyperspherical representation by "turning off and on" the relevant nonadiabatic couplings. The influence of SACs on the recombination is related with the channels of the system and with the scattering energy. For J(Π) = 0(+) symmetry, the two-body recombination channel has an attractive potential well, which makes radial wave functions of both two-body recombination channel and three-body continuum channels accessible in the short hyper-radial range where SACs are located...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27905515/neonicotinoid-induced-impairment-of-odour-coding-in-the-honeybee
#10
Mara Andrione, Giorgio Vallortigara, Renzo Antolini, Albrecht Haase
Exposure to neonicotinoid pesticides is considered one of the possible causes of honeybee (Apis mellifera) population decline. At sublethal doses, these chemicals have been shown to negatively affect a number of behaviours, including performance of olfactory learning and memory, due to their interference with acetylcholine signalling in the mushroom bodies. Here we provide evidence that neonicotinoids can affect odour coding upstream of the mushroom bodies, in the first odour processing centres of the honeybee brain, i...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27903636/spatiotopic-maps-during-dynamic-head-tilt
#11
Kyriaki Mikellidou, Marco Turi, David Charles Burr
Humans maintain a stable representation of the visual world effortlessly, despite constant movements of the eyes, head and body, across multiple planes. Whereas visual stability in the face of saccadic eye-movements has been intensely researched, fewer studies have investigated retinal image transformations induced by head movements, especially in the frontal plane. Unlike head rotations in the horizontal and sagittal planes, tilting the head in the frontal plane is only partially counteracted by torsional eye-movements, and consequently induces a distortion of the retinal image to which we seem to be completely oblivious...
November 30, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27897673/soap-opera-self-as-object-and-agent-in-prioritizing-attention
#12
Grace Truong, Rebecca M Todd
A growing body of evidence has demonstrated that multiple sources of salience tune attentional sets toward aspects of the environment, including affectively and motivationally significant categories of stimuli such as angry faces and reward-associated target locations. Recent evidence further indicates that objects that have gained personal significance through ownership can elicit similar attentional prioritization. Here we discuss current research on sources of attentional prioritization that shape our awareness of the visual world from moment to moment and the underlying neural systems and contextualize what is known about attentional prioritization of our possessions within that research...
November 29, 2016: Journal of Cognitive Neuroscience
https://www.readbyqxmd.com/read/27895608/genetic-consideration-of-schizotypal-traits-a-review
#13
REVIEW
Emma E Walter, Francesca Fernandez, Mollie Snelling, Emma Barkus
Schizotypal traits are of interest and importance in their own right and also have theoretical and clinical associations with schizophrenia. These traits comprise attenuated psychotic symptoms, social withdrawal, reduced cognitive capacity, and affective dysregulation. The link between schizotypal traits and psychotic disorders has long since been debated. The status of knowledge at this point is such schizotypal traits are a risk for psychotic disorders, but in and of themselves only confer liability, with other risk factors needing to be present before a transition to psychosis occurs...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27893253/perception-of-visual-tactile-colocation-in-the-first-year-of-life
#14
Livia Freier, Luke Mason, Andrew J Bremner
An ability to perceive tactile and visual stimuli in a common spatial frame of reference is a crucial ingredient in forming a representation of one's own body and the interface between bodily and external space. In this study, the authors investigated young infants' abilities to perceive colocation between tactile and visual stimuli presented on the hands. They examined infants' visual preferences for spatially congruent and incongruent visual-tactile events across two age groups (6 months and 10-months). They observed increased duration of looking to incongruent stimuli displays in both age groups, indicating that infants from at least 6 months of age demonstrate the ability to determine whether simultaneously presented visual-tactile perceptual events are colocated or not...
December 2016: Developmental Psychology
https://www.readbyqxmd.com/read/27891074/interactive-sonification-of-spontaneous-movement-of-children-cross-modal-mapping-and-the-perception-of-body-movement-qualities-through-sound
#15
Emma Frid, Roberto Bresin, Paolo Alborno, Ludvig Elblaus
In this paper we present three studies focusing on the effect of different sound models in interactive sonification of bodily movement. We hypothesized that a sound model characterized by continuous smooth sounds would be associated with other movement characteristics than a model characterized by abrupt variation in amplitude and that these associations could be reflected in spontaneous movement characteristics. Three subsequent studies were conducted to investigate the relationship between properties of bodily movement and sound: (1) a motion capture experiment involving interactive sonification of a group of children spontaneously moving in a room, (2) an experiment involving perceptual ratings of sonified movement data and (3) an experiment involving matching between sonified movements and their visualizations in the form of abstract drawings...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27890267/-the-silence-of-a-body-and-speech-set-free
#16
Maurice Corcos
Anorexia is a reflection of issues with the body in all its states. The social body and the representation of a model's body, mistreated in order to meet certain standards, the medical body shaken by the mystery of anorexia, and the subjective body and the reality of the flesh. The anorexic body is a testament to a past full of pain and neglect, a sign of emotional deficiency. Caring for the body of a person with anorexia, whatever the approach, means also and above all working with the future of a human being...
November 2016: Soins. Psychiatrie
https://www.readbyqxmd.com/read/27889011/limb-amputation-and-other-disability-desires-as-a-medical-condition
#17
REVIEW
Peter Brugger, Markus Christen, Lena Jellestad, Jürgen Hänggi
Some people have a profound dissatisfaction with what is considered an able-bodied state by most others. These individuals desire to be disabled, by conventional standards. In this Review, we integrate research findings about the desire for a major limb amputation or paralysis (xenomelia). Neuropsychological and neuroimaging explorations of xenomelia show functional and structural abnormalities in predominantly right hemisphere cortical circuits of higher-order bodily representation, including affective and sexual aspects of corporeal awareness...
December 2016: Lancet Psychiatry
https://www.readbyqxmd.com/read/27887906/complex-regional-pain-syndrome-associated-with-hyperattention-rather-than-neglect-for-the-healthy-side-a-comprehensive-case-study
#18
Laure Christophe, Ludovic Delporte, Patrice Revol, Annick DePaepe, Gilles Rode, Sophie Jacquin-Courtois, Yves Rossetti
Complex regional pain syndrome (CRPS) is a dehabilitating chronic condition occurring with peripheral lesions. There is growing consensus for a central contribution to CRPS. Although the nature of this central body representation disorder is increasingly debated, it has been repeatedly argued that CRPS results in motor neglect of the affected side. The present article describes a comprehensive and quantitative case report demonstrating that: (1) not all patients with chronic CRPS exhibit decreased spatial attention for the affected side and (2) patients may actually exhibit a substantial, broad and reliable attentional bias toward the painful side, akin to spatial neglect for the healthy side...
November 22, 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27883017/differential-neural-encoding-of-sensorimotor-and-visual-body-representations
#19
David Perruchoud, Lars Michels, Marco Piccirelli, Roger Gassert, Silvio Ionta
Sensorimotor processing specifically impacts mental body representations. In particular, deteriorated somatosensory input (as after complete spinal cord injury) increases the relative weight of visual aspects of body parts' representations, leading to aberrancies in how images of body parts are mentally manipulated (e.g. mental rotation). This suggests that a sensorimotor or visual reference frame, respectively, can be relatively dominant in local (hands) versus global (full-body) bodily representations. On this basis, we hypothesized that the recruitment of a specific reference frame could be reflected in the activation of sensorimotor versus visual brain networks...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27882680/reconciling-conceptualisations-of-the-body-and-person-centred-care-of-the-older-person-with-cognitive-impairment-in-the-acute-care-setting
#20
Carole Rushton, David Edvardsson
In this article, we sought reconciliation between the "body-as-representation" and the "body-as-experience," that is, how the body is represented in discourse and how the body of older people with cognitive impairment is experienced. We identified four contemporary "technologies" and gave examples of these to show how they influence how older people with cognitive impairment are often represented in acute care settings. We argued that these technologies may be mediated further by discourses of ageism and ableism which can potentiate either the repressive or productive tendencies of these technologies resulting in either positive or negative care experiences for the older person and/or their carer, including nurses...
November 23, 2016: Nursing Philosophy: An International Journal for Healthcare Professionals
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