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Neuroscience and Neurobiology Commons™
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Articles 61 - 70 of 70
Full-Text Articles in Neuroscience and Neurobiology
Why Fish Do Not Feel Pain, Brian Key
Why Fish Do Not Feel Pain, Brian Key
Animal Sentience
Only humans can report feeling pain. In contrast, pain in animals is typically inferred on the basis of nonverbal behaviour. Unfortunately, these behavioural data can be problematic when the reliability and validity of the behavioural tests are questionable. The thesis proposed here is based on the bioengineering principle that structure determines function. Basic functional homologies can be mapped to structural homologies across a broad spectrum of vertebrate species. For example, olfaction depends on olfactory glomeruli in the olfactory bulbs of the forebrain, visual orientation responses depend on the laminated optic tectum in the midbrain, and locomotion depends on pattern generators …
On The Sentience Of Fish, Pentti O. Haikonen
On The Sentience Of Fish, Pentti O. Haikonen
Animal Sentience
Key’s (2016) target article, “Why fish do not feel pain,” is based on a moralistic fallacy where conclusions about natural conditions are drawn not from research and experiments, but from subjective moral views on how things should be. Moreover, the neurobiological findings purporting to show that fish do not feel pain are insufficient for drawing this conclusion.
Should Fish Feel Pain? A Plant Perspective, František Baluška
Should Fish Feel Pain? A Plant Perspective, František Baluška
Animal Sentience
Key (2016) claims fish that fish do not feel pain because they lack the necessary neuronal architecture: their responses to noxious stimuli, according to Key, are executed automatically without any feelings. However, as pointed out by many of his commentators, this conclusion is not convincing. Plants might provide some clues. Plants are not usually thought to be very active behaviorally, but the evidence suggests otherwise. Moreover, in stressful situations, plants produce numerous chemicals that have painkilling and anesthetic properties. Finally, plants, when treated with anesthetics, cannot execute active behaviors such as touch-induced leaf movements or rapid trap closures after localizing …
Cortex Necessary For Pain — But Not In Sense That Matters, Adam J. Shriver
Cortex Necessary For Pain — But Not In Sense That Matters, Adam J. Shriver
Animal Sentience
Certain cortical regions are necessary for pain in humans in the sense that, at particular times, they play a direct role in pain. However, it is not true that they are necessary in the more important sense that pain is never possible in humans without them. There are additional details from human lesion studies concerning functional plasticity that undermine Key’s (2016) interpretation. Moreover, no one has yet identified any specific behaviors that mammalian cortical pain regions make possible that are absent in fish.
Pain-Capable Neural Substrates May Be Widely Available In The Animal Kingdom, Edgar T. Walters
Pain-Capable Neural Substrates May Be Widely Available In The Animal Kingdom, Edgar T. Walters
Animal Sentience
Neural and behavioral evidence from diverse species indicates that some forms of pain may be generated by coordinated activity in networks far smaller than the cortical pain matrix in mammals. Studies on responses to injury in squid suggest that simplification of the circuitry necessary for conscious pain might be achieved by restricting awareness to very limited information about a noxious event, possibly only to the fact that injury has occurred, ignoring information that is much less important for survival, such as the location of the injury. Some of the neural properties proposed to be critical for conscious pain in mammals …
Reducing Subjectivity: Meditation And Implicit Bias, Diana M. Ciuca
Reducing Subjectivity: Meditation And Implicit Bias, Diana M. Ciuca
CMC Senior Theses
Implicit association of racial stereotypes is brought about by social conditioning (Greenwald & Krieger, 2006). This conditioning can be explained by attractor networks (Sharp, 2011). Reducing implicit bias through meditation can show the effectiveness of reducing the rigidity of attractor networks, thereby reducing subjectivity. Mindfulness meditation has shown to reduce bias from the use of one single guided session conducted before performing an Implicit Association Test (Lueke & Gibson, 2015). Attachment to socially conditioned racial bias should become less prevalent through practicing meditation over time. An experimental model is proposed to test this claim along with a reconceptualization of consciousness …
Unconscious Neural Processing Differs With Method Used To Render Stimuli Invisible, Sergey V. Fogelson, Peter J. Kohler, Kevin J. Miller, Richard Granger, Peter U. Tse
Unconscious Neural Processing Differs With Method Used To Render Stimuli Invisible, Sergey V. Fogelson, Peter J. Kohler, Kevin J. Miller, Richard Granger, Peter U. Tse
Dartmouth Scholarship
Visual stimuli can be kept from awareness using various methods. The extent of processing that a given stimulus receives in the absence of awareness is typically used to make claims about the role of consciousness more generally. The neural processing elicited by a stimulus, however, may also depend on the method used to keep it from awareness, and not only on whether the stimulus reaches awareness. Here we report that the method used to render an image invisible has a dramatic effect on how category information about the unseen stimulus is encoded across the human brain. We collected fMRI data …
Implicitly Priming The Social Brain: Failure To Find Neural Effects, Katherine E. Powers, Todd F. Heatherton
Implicitly Priming The Social Brain: Failure To Find Neural Effects, Katherine E. Powers, Todd F. Heatherton
Dartmouth Scholarship
Humans have a fundamental need for social relationships. Rejection from social groups is especially detrimental, rendering the ability to detect threats to social relationships and respond in adaptive ways critical. Indeed, previous research has shown that experiencing social rejection alters the processing of subsequent social cues in a variety of socially affiliative and avoidant ways. Because social perception and cognition occurs spontaneously and automatically, detecting threats to social relationships may occur without conscious awareness or control. Here, we investigated the automaticity of social threat detection by examining how implicit primes affect neural responses to social stimuli. However, despite using a …
Quintessence Of Dust: Cognitive Neuroscience And An Actor's Process, Jason Christopher Davis
Quintessence Of Dust: Cognitive Neuroscience And An Actor's Process, Jason Christopher Davis
Dissertations, Masters Theses, Capstones, and Culminating Projects
This thesis examines theories provided by cognitive neuroscience and applies them to an actor’s process. In particular, this research addresses the subjectivity and intentionality of our consciousness and special as-if states of consciousness, supported by the work of John Searle and Antonio Damasio. The phenomenal feeling of character-model control is discussed and supported by the work of Thomas Metzinger. The paper also considers our relative understanding of mirror neurons and specifically their function in relation to intersubjectivity and their use for an actor’s creation and conveyance of character in rehearsal and performance. It examines Stanislavsky’s notion of emotional memory and …
Iconic Memory Requires Attention, Marjan Persuh, Boris Genzer, Robert D. Melara
Iconic Memory Requires Attention, Marjan Persuh, Boris Genzer, Robert D. Melara
Publications and Research
Two experiments investigated whether attention plays a role in iconic memory, employing either a change detection paradigm (Experiment 1) or a partial-report paradigm (Experiment 2). In each experiment, attention was taxed during initial display presentation, focusing the manipulation on consolidation of information into iconic memory, prior to transfer into working memory. Observers were able to maintain high levels of performance (accuracy of change detection or categorization) even when concurrently performing an easy visual search task (low load). However, when the concurrent search was made difficult (high load), observers' performance dropped to almost chance levels, while search accuracy held at single-task …