The Experts below are selected from a list of 177 Experts worldwide ranked by ideXlab platform
Luc Marlier - One of the best experts on this subject based on the ideXlab platform.
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olfactory alliesthesia in human neonates prandial state and stimulus familiarity modulate facial and autonomic responses to milk odors
Developmental Psychobiology, 1999Co-Authors: Robert Soussignan, Benoist Schaal, Luc MarlierAbstract:This study examines the effects of a shift in the motivational state (from hunger to satiety) of human neonates on their behavioral and autonomic responsiveness to artificial and food-related odors as a function of stimulus familiarity. In Experiment 1, videotaped facial movements and autonomic (respiration rate: RR, heart rate: HR) responses to five olfactory stimuli (familiar regular formula, unfamiliar regular formula, protein hydrolysate formula, vanillin, control) are recorded in 3-day-old neonates (n = 14) during episodes of irregular sleep. The infants are tested on average 50 min. before and after bottle feeding. RR discriminates the odor stimuli from the control stimulus, indicating clear olfactory detection. Furthermore, neonates react with higher HR change only when exposed to their familiar formula milk during the postprandial condition. The measurement of facial movements with the Baby-Facial Action Coding System indicates that disgust and aversive actions are more often evoked by the odor of regular formulas (familiar or unfamiliar) than by the other olfactory stimuli during the postprandial condition. In Experiment 2, untrained adult observers, presented with the videotapes of the infants' facial responses to the odors, are able to decode differential hedonic signals from the sender faces as a function of the infants' motivational states. The present findings are in line with the concept of olfactory alliesthesia as defined in adults. © 1999 John Wiley & Sons, Inc. Dev Psychobiol 35: 3–14, 1999
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olfactory alliesthesia in human neonates prandial state and stimulus familiarity modulate facial and autonomic responses to milk odors
Developmental Psychobiology, 1999Co-Authors: Robert Soussignan, Benoist Schaal, Luc MarlierAbstract:This study examines the effects of a shift in the motivational state (from hunger to satiety) of human neonates on their behavioral and autonomic responsiveness to artificial and food-related odors as a function of stimulus familiarity. In Experiment 1, videotaped facial movements and autonomic (respiration rate: RR, heart rate: HR) responses to five olfactory stimuli (familiar regular formula, unfamiliar regular formula, protein hydrolysate formula, vanillin, control) are recorded in 3-day-old neonates (n = 14) during episodes of irregular sleep. The infants are tested on average 50 min. before and after bottle feeding. RR discriminates the odor stimuli from the control stimulus, indicating clear olfactory detection. Furthermore, neonates react with higher HR change only when exposed to their familiar formula milk during the postprandial condition. The measurement of facial movements with the Baby-Facial Action Coding System indicates that disgust and aversive actions are more often evoked by the odor of regular formulas (familiar or unfamiliar) than by the other olfactory stimuli during the postprandial condition. In Experiment 2, untrained adult observers, presented with the videotapes of the infants' facial responses to the odors, are able to decode differential hedonic signals from the sender faces as a function of the infants' motivational states. The present findings are in line with the concept of olfactory alliesthesia as defined in adults.
Robert Soussignan - One of the best experts on this subject based on the ideXlab platform.
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alliesthesia to food cues heterogeneity across stimuli and sensory modalities
Physiology & Behavior, 2008Co-Authors: Tao Jiang, Sylviane Martin, Laurent Brondel, Robert Soussignan, Jean-pierre Royet, Daniel Rigaud, Benoist SchaalAbstract:Abstract Negative alliesthesia to olfactory and visual stimuli was assessed in 29 normal-weight women who, on alternate days, were either fasting or in a postprandial state after an ad libitum lunch. The participants were alternatively exposed to food and non-food pictures and odorants, and then rated for their hedonic appreciation (liking) and their desire to ingest (wanting) the evoked foods. While negative alliesthesia was observed only for food stimuli, it did not equally affect all food categories in either sensory modality. The stimuli representing foods eaten in typical local main dishes or having high energy density (e.g., pizza, bacon, beef, cheese) evoked clear negative alliesthesia, whereas this was not the case for those less consumed within a customary meal or associated with desserts (i.e., fruits). Furthermore, the visual food stimuli triggered a more negative shift in liking than did the food odours. Finally, the shift in wanting between pre- and post-meal state was more important than the shift in liking. These results suggest that alliesthesia may be influenced by both metabolic and non-metabolic factors.
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olfactory alliesthesia in human neonates prandial state and stimulus familiarity modulate facial and autonomic responses to milk odors
Developmental Psychobiology, 1999Co-Authors: Robert Soussignan, Benoist Schaal, Luc MarlierAbstract:This study examines the effects of a shift in the motivational state (from hunger to satiety) of human neonates on their behavioral and autonomic responsiveness to artificial and food-related odors as a function of stimulus familiarity. In Experiment 1, videotaped facial movements and autonomic (respiration rate: RR, heart rate: HR) responses to five olfactory stimuli (familiar regular formula, unfamiliar regular formula, protein hydrolysate formula, vanillin, control) are recorded in 3-day-old neonates (n = 14) during episodes of irregular sleep. The infants are tested on average 50 min. before and after bottle feeding. RR discriminates the odor stimuli from the control stimulus, indicating clear olfactory detection. Furthermore, neonates react with higher HR change only when exposed to their familiar formula milk during the postprandial condition. The measurement of facial movements with the Baby-Facial Action Coding System indicates that disgust and aversive actions are more often evoked by the odor of regular formulas (familiar or unfamiliar) than by the other olfactory stimuli during the postprandial condition. In Experiment 2, untrained adult observers, presented with the videotapes of the infants' facial responses to the odors, are able to decode differential hedonic signals from the sender faces as a function of the infants' motivational states. The present findings are in line with the concept of olfactory alliesthesia as defined in adults. © 1999 John Wiley & Sons, Inc. Dev Psychobiol 35: 3–14, 1999
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olfactory alliesthesia in human neonates prandial state and stimulus familiarity modulate facial and autonomic responses to milk odors
Developmental Psychobiology, 1999Co-Authors: Robert Soussignan, Benoist Schaal, Luc MarlierAbstract:This study examines the effects of a shift in the motivational state (from hunger to satiety) of human neonates on their behavioral and autonomic responsiveness to artificial and food-related odors as a function of stimulus familiarity. In Experiment 1, videotaped facial movements and autonomic (respiration rate: RR, heart rate: HR) responses to five olfactory stimuli (familiar regular formula, unfamiliar regular formula, protein hydrolysate formula, vanillin, control) are recorded in 3-day-old neonates (n = 14) during episodes of irregular sleep. The infants are tested on average 50 min. before and after bottle feeding. RR discriminates the odor stimuli from the control stimulus, indicating clear olfactory detection. Furthermore, neonates react with higher HR change only when exposed to their familiar formula milk during the postprandial condition. The measurement of facial movements with the Baby-Facial Action Coding System indicates that disgust and aversive actions are more often evoked by the odor of regular formulas (familiar or unfamiliar) than by the other olfactory stimuli during the postprandial condition. In Experiment 2, untrained adult observers, presented with the videotapes of the infants' facial responses to the odors, are able to decode differential hedonic signals from the sender faces as a function of the infants' motivational states. The present findings are in line with the concept of olfactory alliesthesia as defined in adults.
Benoist Schaal - One of the best experts on this subject based on the ideXlab platform.
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alliesthesia to food cues heterogeneity across stimuli and sensory modalities
Physiology & Behavior, 2008Co-Authors: Tao Jiang, Sylviane Martin, Laurent Brondel, Robert Soussignan, Jean-pierre Royet, Daniel Rigaud, Benoist SchaalAbstract:Abstract Negative alliesthesia to olfactory and visual stimuli was assessed in 29 normal-weight women who, on alternate days, were either fasting or in a postprandial state after an ad libitum lunch. The participants were alternatively exposed to food and non-food pictures and odorants, and then rated for their hedonic appreciation (liking) and their desire to ingest (wanting) the evoked foods. While negative alliesthesia was observed only for food stimuli, it did not equally affect all food categories in either sensory modality. The stimuli representing foods eaten in typical local main dishes or having high energy density (e.g., pizza, bacon, beef, cheese) evoked clear negative alliesthesia, whereas this was not the case for those less consumed within a customary meal or associated with desserts (i.e., fruits). Furthermore, the visual food stimuli triggered a more negative shift in liking than did the food odours. Finally, the shift in wanting between pre- and post-meal state was more important than the shift in liking. These results suggest that alliesthesia may be influenced by both metabolic and non-metabolic factors.
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olfactory alliesthesia in human neonates prandial state and stimulus familiarity modulate facial and autonomic responses to milk odors
Developmental Psychobiology, 1999Co-Authors: Robert Soussignan, Benoist Schaal, Luc MarlierAbstract:This study examines the effects of a shift in the motivational state (from hunger to satiety) of human neonates on their behavioral and autonomic responsiveness to artificial and food-related odors as a function of stimulus familiarity. In Experiment 1, videotaped facial movements and autonomic (respiration rate: RR, heart rate: HR) responses to five olfactory stimuli (familiar regular formula, unfamiliar regular formula, protein hydrolysate formula, vanillin, control) are recorded in 3-day-old neonates (n = 14) during episodes of irregular sleep. The infants are tested on average 50 min. before and after bottle feeding. RR discriminates the odor stimuli from the control stimulus, indicating clear olfactory detection. Furthermore, neonates react with higher HR change only when exposed to their familiar formula milk during the postprandial condition. The measurement of facial movements with the Baby-Facial Action Coding System indicates that disgust and aversive actions are more often evoked by the odor of regular formulas (familiar or unfamiliar) than by the other olfactory stimuli during the postprandial condition. In Experiment 2, untrained adult observers, presented with the videotapes of the infants' facial responses to the odors, are able to decode differential hedonic signals from the sender faces as a function of the infants' motivational states. The present findings are in line with the concept of olfactory alliesthesia as defined in adults. © 1999 John Wiley & Sons, Inc. Dev Psychobiol 35: 3–14, 1999
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olfactory alliesthesia in human neonates prandial state and stimulus familiarity modulate facial and autonomic responses to milk odors
Developmental Psychobiology, 1999Co-Authors: Robert Soussignan, Benoist Schaal, Luc MarlierAbstract:This study examines the effects of a shift in the motivational state (from hunger to satiety) of human neonates on their behavioral and autonomic responsiveness to artificial and food-related odors as a function of stimulus familiarity. In Experiment 1, videotaped facial movements and autonomic (respiration rate: RR, heart rate: HR) responses to five olfactory stimuli (familiar regular formula, unfamiliar regular formula, protein hydrolysate formula, vanillin, control) are recorded in 3-day-old neonates (n = 14) during episodes of irregular sleep. The infants are tested on average 50 min. before and after bottle feeding. RR discriminates the odor stimuli from the control stimulus, indicating clear olfactory detection. Furthermore, neonates react with higher HR change only when exposed to their familiar formula milk during the postprandial condition. The measurement of facial movements with the Baby-Facial Action Coding System indicates that disgust and aversive actions are more often evoked by the odor of regular formulas (familiar or unfamiliar) than by the other olfactory stimuli during the postprandial condition. In Experiment 2, untrained adult observers, presented with the videotapes of the infants' facial responses to the odors, are able to decode differential hedonic signals from the sender faces as a function of the infants' motivational states. The present findings are in line with the concept of olfactory alliesthesia as defined in adults.
Michel Cabanac - One of the best experts on this subject based on the ideXlab platform.
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alliesthesia in visual and auditory sensations from environmental signals
Physiology & Behavior, 2007Co-Authors: Laurent Brondel, Michel CabanacAbstract:Abstract ‘Alliesthesia’ describes the fact that sensory stimuli can arouse pleasant or unpleasant sensations according to the internal state of a person. In the present work, the hedonicity aroused by stimuli from the environment in visual and auditory sensations was evaluated in 5 situations: 1) daytime without sensory stimulations (no video-tape); 2) daytime with poor sensory stimulations (uninteresting video-tape film); 3) daytime with rich sensory stimulations (interesting chosen movie on video-tape); 4) night-time without sensory stimulations (no video-tape); 5) night-time with poor sensory stimulations (uninteresting video-tape). During the day, hedonic ratings decreased with time in the no- and uninteresting video-tape film conditions ( p p p p r = 0.541 and r = − 0.593; p
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diet induced weight loss accelerates onset of negative alliesthesia in obese women
BMC Public Health, 2005Co-Authors: Patrick Frankham, Caroline Gosselin, Michel CabanacAbstract:Background The physiological and behavioral responses to hypocaloric diet are to increase energy intake to defend a steady body weight. We utilized the method of "negative alliesthesia" for measuring the hedonic reponse to sweet stimulus before (Initial session) and 3 months after entering a weight loss program. The negative alliesthesia test is known by physiologists but few clinical data exist. It is based on the observation that repeated pleasant gustatory stimuli turn into unpleasantness in the process of alliesthesia. At first visit participants repeatedly ingested sweet stimuli until they found them unpleasant and rated quantitatively on a linear analogue scale their hedonic experience. This procedure was repeated every 3 min until participants felt displeasure to end the session. The same protocol was followed after three months of following a weight loss diet. Dieting energy intake was from 1400 – 2000 kcal/d for 8 wk. Energy composition was 50% carb:25% prot: 25% lipid. After 8 wk caloric intake increased by 50 kcal/wk, to reach daily intake of 1800 – 2400 kcal/d. Energy composition was 50% carb:22% prot: 27% lipid. We report results on the effect of slow weight loss on negative alliesthesia in ten obese female participants enrolled in a commercial diet program based on Canada's Food Guide (Mincavi®).
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accelerated satiation after duodenal switch
Surgery for Obesity and Related Diseases, 2005Co-Authors: Picard Marceau, Patrick Frankham, Michel Cabanac, Fredericsimon Hould, Stefane Lebel, Simon Marceau, Odette Lescelleur, Simon BironAbstract:Abstract Background This is to introduce a new test "negative alliesthesia" for measuring satiation after bariatric surgery. It is a test that is well known by physiologists but has never been used clinically. It is based on the observation that repeated pleasant gustatory stimuli turn into unpleasantness in the process of satiation. Methods We measured the time it took for a repeatedly ingested sweet stimulus to become first unpleasant (negative alliesthesia) and then intolerable (satiety). At the same time, we measured the degree of pleasure aroused by the sweet stimulus (hedonic rating). The test was given to 9 patients before and 3 and 6 months after the duodenal switch procedure and in 10 morbidly obese patients, three times, 3 months apart. Results The test showed that negative alliesthesia and satiety were three times faster after surgery. The negative alliesthesia time decreased from 16.0 ± 3.9 minutes to 5.7 ± 1.4 minutes ( P P Conclusion The duodenal switch modified negative alliesthesia. It is too soon to say what place this test may have in bariatric surgery, but its simplicity and ingenuity are attractive.
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postingestive alliesthesia produced by exogenous cholecystokinin and blocked by abdominal vagotomy
American Journal of Physiology-regulatory Integrative and Comparative Physiology, 1994Co-Authors: Michel Cabanac, Chenqi ZhaoAbstract:Facial consummatory responses reflecting ingestive and aversive perceptions were studied and quantified in rats chronically implanted with oral catheters. A gustatory stimulus of 50 microliters of 1.75 M sucrose was injected into the mouth every 5 min during 65 min. At 5 min, 2 micrograms/kg exogenous cholecystokinin (CCK) was injected intraperitoneally. Typical ingestive facial consummatory responses were observed in response to sweet stimuli before the load. Aversive consummatory responses were observed in response to sweet stimuli after the intraperitoneal exogenous CCK (negative alliesthesia). Control intraperitoneal injection of saline was not followed by negative alliesthesia in response to sweet oral stimuli. In the last part of the experiment rats were vagotomized or underwent sham operation. When the vagotomized rats were again subjected to the same gustatory sessions, the intraperitoneal exogenous CCK was not followed by negative alliesthesia in response to sweet stimuli, whereas sham-operated rats presented a strong negative alliesthesia. These results in rats suggest that CCK mediates duodenal preabsorptive signal for alimentary alliesthesia. They also suggest that the effect is peripheral, with the vagus nerve as afferent pathway.
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experimental study of the internal signal of alliesthesia induced by sweet molecules in rats
Physiology & Behavior, 1994Co-Authors: C. Zhao, Michel CabanacAbstract:Abstract To identify the preabsorptive signal that arouses alliesthesia, we compared the effects of five sweet molecules: glucose (3 g · 5 ml−1), cyclamate (0.280 g · 5 ml−1), saccharin (0.016 g · 5 ml−1), aspartame (0.020 g · 5 ml−1), and mannitol (3 g · 5 ml−1) on the ingestiveaversive responses of rats. In Experiment 1, the sweet stimuli were adjusted to taste similarly sweet, and they were administered orally; they aroused similar ingestive responses. In Experiment 2, an isovolumetric load of each of the five molecules was administered in the stomach and its influence on ingestive/aversive response aroused by oral sucrose was recorded. Negative alliesthesia was obtained after gastric loads of glucose and mannitol, but not after gastric loads of cyclamate, saccharin, and aspartame.
Richard De Dear - One of the best experts on this subject based on the ideXlab platform.
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thermal pleasure in built environments spatial alliesthesia from air movement
Building Research and Information, 2017Co-Authors: Thomas Parkinson, Richard De DearAbstract:ABSTRACTIn recent years there has been a shift in research focus away from the negative effects of draught towards the positive benefits of air movement, particularly in the context of personal environmental control (PEC) systems. Thermal perception under targeted air movement is different from exposures in airflow uniformly distributed across the body, but is less well understood. Specification of performance criteria for PEC systems remains unresolved, as there are no clear conclusions regarding optimum target area, velocity ranges or patterns of velocity dynamics. This paper examines the effects of different local air-velocity profiles on thermal sensation and thermal pleasure experienced by human subjects near the upper boundary of the comfort zone, and interprets the findings within the theoretical framework of spatial alliesthesia. It was found that positive thermal pleasure can be achieved when contrasting relationships between local and global skin temperatures trends are established. The substant...
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thermal pleasure in built environments spatial alliesthesia from contact heating
Building Research and Information, 2016Co-Authors: Thomas Parkinson, Richard De DearAbstract:The comfort zone is bounded by thermal environmental conditions that may be described as acceptably cool or acceptably warm, and engineering out of existence these innocuous thermal conditions on the fringes of the adaptive comfort range may not be necessary. In contrast to the conventional understanding of local discomfort, spatial alliesthesia exploits corrective differences in the rate of change in skin temperature between individual body segments to elicit positive affective sensations. This paper examines reverse instances of local discomfort, or spatial alliesthesia, from warm contact stimuli applied to hand and feet when exposed to ambient conditions towards the lower margin of the comfort zone. It was found that subjects with moderate feelings of displeasure or even indifference were still capable of experiencing a pleasant response to localized thermal stimuli. Brief whole-body thermal pleasure was observed from in-situ skin temperature changes at a single distal body site. These effects were sub...
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thermal pleasure in built environments alliesthesia in different thermoregulatory zones
Building Research and Information, 2016Co-Authors: Thomas Parkinson, Richard De Dear, Christhina CandidoAbstract:The principle of thermal alliesthesia indicates that the hedonic character of a thermal environment is determined as much by the general state of the subject as by the environment itself. An environmental stimulus that offsets or counters a thermoregulatory load error will be pleasantly perceived, and vice versa. Extant empirical evidence supporting thermal alliesthesia only exists for instances of core temperature deviation. Yet the reconciliation of alliesthesia with contemporary neurophysiological discourse (in the previous paper in this series) renders the concept directly relevant to everyday experiences in built environments where core temperature rarely deviates from neutral values. New experimental data are presented that explore alliesthesia in non-steady-state conditions across three different physiological states: thermoneutral; the upper and lower fringes of the thermoneutral zone; and mild excursions into the sweating and shivering regulatory zones. Thirteen human subjects evaluated the hedon...
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thermal pleasure in built environments physiology of alliesthesia
Building Research and Information, 2015Co-Authors: Thomas Parkinson, Richard De DearAbstract:International standards that define thermal comfort in uniform environments are based on the steady-state heat balance equation that posits ‘neutrality’ as the optimal occupant comfort state for which environments are designed. But thermal perception is more than an outcome of a deterministic, steady-state heat balance. Thermal alliesthesia is a conceptual framework to understand the hedonics of a much larger spectrum of thermal environments than the more thoroughly researched concept of thermal neutrality. At its simplest, thermal alliesthesia states that the hedonic qualities of the thermal environment are determined as much by the general thermal state of the subject as by the environment itself. A peripheral thermal stimulus that offsets or counters a thermoregulatory load-error will be pleasantly perceived and vice versa, a stimulus that exacerbates thermoregulatory load-error will feel unpleasant. The present paper elaborates the thermophysiological hypothesis of alliesthesia with a particular focus...
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perception of transient thermal environments pleasure and alliesthesia
7th Windsor Conference: The Changing Context of Comfort in an Unpredictable World 2012, 2012Co-Authors: Christhina Candido, Richard De Dear, Thomas ParkinsonAbstract:Recent research indicates that dynamic thermal environments can potentially deliver higher levels of occupant satisfaction than static, homogenous indoor environments. The physiological concept of alliesthesia presents a coherent framework for investigating thermal pleasure arising from environmental or metabolic transients. This project investigated the relationship between core and skin temperatures and thermal pleasure in transient thermal environments. Pilot studies recorded skin temperature (Tsk) and core temperature (Tc) of six healthy males through a series of environmental and metabolic changes. Preliminary results indicate that sudden changes in ambient temperature were rated pleasantly whenever a positive alliesthesial effect was induced (i.e. opposite polarity of Tsk and Tc). This decayed as the subject returned to thermoneutrality. The same environmental step change invoked a displeasure response when the core temperature was stable. It is possible that higher levels of occupant satisfaction in transient or textured thermal environments may be explained by the hedonic overtones from the alliesthesial effect.