A5029036746- Olfactory and Sensory Function Studies
- Advanced Chemical Sensor Technologies
- Biochemical Analysis and Sensing Techniques
- Multisensory perception and integration
- Neurobiology and Insect Physiology Research
- Neural dynamics and brain function
- Memory and Neural Mechanisms
- Functional Brain Connectivity Studies
- Animal and Plant Science Education
- Color perception and design
- Animal Behavior and Reproduction
- Action Observation and Synchronization
- Memory Processes and Influences
- Circadian rhythm and melatonin
- Mental Health Research Topics
- Tactile and Sensory Interactions
- Language, Metaphor, and Cognition
- EEG and Brain-Computer Interfaces
- Insect Pheromone Research and Control
- Advanced Causal Inference Techniques
- Visual perception and processing mechanisms
- Essential Oils and Antimicrobial Activity
- Categorization, perception, and language
- Neurological disorders and treatments
- Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
Karolinska Institutet
2016-2025
Stockholm University
2012-2022
Radboud University Nijmegen
2016-2020
Utrecht University
2020
University of York
2020
Studi
2017
Allen Institute for Brain Science
2008
Autobiographical memories (AMs) are personally experienced events that may be localized in time and space. In the present work we an overview targeting evoked by sense of smell. Overall, research indicates autobiographical odor memory is different than our primary sensory systems; sight hearing. Here, observed differences from a behavioral neuroanatomical perspective presented. The key features olfactory AM referred to LOVER acronym - Limbic, Old, Vivid, Emotional, Rare.
In the present work we an overview of experimental findings corroborating olfactory imagery observations with visual and auditory modalities. Overall, results indicate that information share many features those observed in primary senses although some major differences are evident. One such difference pertains to considerable individual observed, majority being unable reproduce their mind. Here, highlight factors positively related capacity, as semantic knowledge, perceptual experience,...
In mammals respiratory-locked hippocampal rhythms are implicated in the scaffolding and transfer of information between sensory memory networks. These oscillations entrained by nasal respiration driven olfactory bulb. They then travel to piriform cortex where they propagate further downstream hippocampus modulate neural processes critical for formation. humans, bypassing airflow through mouth-breathing abolishes these impacts encoding as well recognition thereby reducing performance. It has...
Abstract Although taste and smell seem hard to imagine, some people nevertheless report vivid imagery in these sensory modalities. We investigate whether experts are better able imagine smells tastes because they have learned the ability, or imaginers first place, so become experts. To test this, we compared a group of wine yoked novices using battery questionnaires. show for time that greater vividness imagery, with no difference across In contrast, had more color than odor wines. Experts...
Humans share sensory systems with a common anatomical blueprint, but individual experience nevertheless varies. In olfaction, it is not known to what degree perception, particularly the perception of odor pleasantness, founded on universal principles,1Khan R.M. Luk C.-H. Flinker A. Aggarwal Lapid H. Haddad R. Sobel N. Predicting pleasantness from odorant structure: as reflection physical world.J. Neurosci. 2007; 27: 10015-10023Crossref PubMed Scopus (253) Google Scholar, 2Haddad Medhanie...
Current non-invasive neuroimaging methods can assess neural activity in all areas of the human brain but olfactory bulb (OB). The OB has been suggested to fulfill a role comparable that V1 and thalamus visual system have closely linked wide range tasks neuropathologies. Here we present method for recording signals from with millisecond precision. We demonstrate obtained via recordings EEG electrodes at nasal bridge represent responses - term Electrobulbogram (EBG). EBG will aid future...
Abstract In response to the coronavirus disease 2019 (COVID-19) pandemic, countries have implemented various strategies reduce and slow spread of in general population. For that restrictions on its population a stepwise manner, monitoring COVID-19 prevalence is importance guide decision when impose new, or abolish old, restrictions. We are here determining whether measures odor intensity large sample can serve as one such measure. Online how intense common household odors perceived symptoms...
Significance Whether an odor's perceived valence induces approach response or triggers avoidance is critical for survival, and yet little known about the neural mechanisms supporting this decision. Using electrophysiological measures from human olfactory bulb (OB), first processing stage of system, full-body movement, we provide evidence that process initiated in OB. We demonstrate odor associated with both gamma beta activity Furthermore, show unpleasant odors have privileged temporal OB...
Objective: To show which adjusted cross-lagged and concurrent effects to expect from panel models in the case of true causal increasing decreasing effects.Design: Full factorial prospective situ experimental study.Setting: The first author’s kitchen.Participants: Twenty plastic cups.Main outcome measures: Total weight (i.e. including their content) cups before after adding or removing water to/from them. Results: We found amount added have: (1) A positive effect on subsequent total when...
Recent advances in non-linear computational and dynamical modelling have opened up the possibility to parametrize dynamic neural mechanisms that drive complex behavior. Importantly, building models of neuronal processes is key importance fully understand disorders brain as it may provide a quantitative platform capable binding multiple neurophysiological phenotype profiles. In this study, we apply newly developed adaptive frequency-based model whole-brain oscillations resting-state fMRI data...
Across diverse lineages, animals communicate using chemosignals, but only humans about chemical signals. Many studies have observed that compared with other sensory modalities, communication smells is relatively rare and not always reliable. Recent cross-cultural studies, on the hand, suggest some communities are more olfactorily oriented than previously supposed. Nevertheless, across globe a general trend emerges where olfactory hard. We here this in part because representations different...
Neuronal oscillations route external and internal information across brain regions. In the olfactory system, two central nodes—the bulb (OB) piriform cortex (PC)—communicate with each other via neural to shape percept. Communication between these nodes have been well characterized in non-human animals but less is known about their role human system. Using a recently developed validated EEG-based method extract signals from OB PC sources, we show healthy participants that there bottom-up flow...
Abstract Respiration shapes brain activity and synchronizes sensory exploratory motor actions, with some evidence suggesting that it also affects pupil size. However, for a coupling between respiration size remains scarce inconclusive, hindered by small sample sizes limited controls. Given the importance of in visual perception as reflection state, understanding its relationship is essential. In five experiments using pre‐registered protocol, we systematically investigated how respiratory...
Understanding stimulus intensity processing is fundamental in sensory science, yet this question remains largely unexplored human olfaction. We investigated how the olfactory bulb (OB) and piriform cortex (PC) process odor concentration versus subjective perceived intensity. demonstrate that OB-PC network oscillatory dynamics are predominantly driven by intensity, not physical concentration. The OB initially processes communicates to PC via early gamma-band oscillations (bottom-up feedback)....
We investigated the relationship between olfactory awareness and proficiency as determined by a set of standardised tasks. Olfactory was indexed scores in questionnaires focusing on odour interest, imagery ability, prevalence dreams. Nineteen subjects with high 20 low were presented tasks: threshold, episodic recognition, identification. The results showed that individuals excelled memory identified more odours compared group. Interestingly, naming ability exerted no influence memory....
Chemosignals are used by predators to localize prey and avoid predators. These cues vary between species, but the odor of blood seems be an exception suggests presence evolutionarily conserved chemosensory cue within mixture. A component, E2D, has been shown trigger approach responses identical those triggered full in mammalian carnivores as such, is a key candidate food/alarm blood. Using multidisciplinary approach, we demonstrate that E2D holds dual function affecting both avoidance...
Although evidence is mixed, studies have shown that blind individuals perform better than sighted at specific auditory, tactile, and chemosensory tasks. However, few assessed across different sensory modalities in the same study. We tested early (n = 15), late 30) participants with analogous olfactory auditory tests absolute threshold, discrimination, identification, episodic recognition, metacognitive ability. multivariate analysis of variance (MANOVA) showed no overall effect blindness...
Experts have better memory for items within their domain of expertise. Critically, this does not depend on more efficient use language. However, conclusion is based mainly findings from experts in visual and auditory domains. Olfactory constitute an interesting potential counterexample since language has been implicated to be critically involved odor previous studies. We examined the role plays recognition wine experts, who typically display than novices are also able name odors lay people....
Abstract Removing function from a developed and functional sensory system is known to alter both cerebral morphology connections. To date, majority of studies assessing sensory-dependent plasticity have focused on effects either early onset or long-term loss little how the recent affects human brain. With aim determining connectivity, we assessed differences between individuals with acquired olfactory (duration 7–36 months) matched healthy controls in their grey matter volume, using...