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Related Concept Videos

Physiology of Smell and Olfactory Pathway01:20

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Humans detect odors with the help of specialized cells located in the upper part of the nasal cavity, called olfactory receptor neurons (ORNs). ORNs possess hair-like structures called cilia, which are receptive to sensations from the inhaled air. When an odorant molecule binds to a specific receptor on the cell of the cilia, it leads to a series of events that ultimately cause the ORN to send electrical signals to the olfactory bulb in the brain through the olfactory nerves.
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Olfaction01:25

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The sense of smell is achieved through the activities of the olfactory system. It starts when an airborne odorant enters the nasal cavity and reaches olfactory epithelium (OE). The OE is protected by a thin layer of mucus, which also serves the purpose of dissolving more complex compounds into simpler chemical odorants. The size of the OE and the density of sensory neurons varies among species; in humans, the OE is only about 9-10 cm2.
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Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
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Tactile and Chemical Senses01:27

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Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex.
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Gustation is a chemical sense that, along with olfaction (smell), contributes to our perception of taste. It starts with the activation of receptors by chemical compounds (tastants) dissolved in the saliva. The saliva and filiform papillae on the tongue distribute the tastants and increase their exposure to the taste receptors.
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The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
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Updated: Nov 8, 2025

Olfactory Context Dependent Memory: Direct Presentation of Odorants
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Olfactory Context Dependent Memory: Direct Presentation of Odorants

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Smells Influence Perceived Pleasantness but Not Memorization of a Visual Virtual Environment.

Agnieszka Sabiniewicz1, Elena Schaefer2, Guducu Cagdas3

  • 1Interdisciplinary Center "Smell & Taste", Department of Otorhinolaryngology, TU Dresden, Dresden, Germany Institute of Psychology, University of Wrocław, Wrocław, Poland.

I-Perception
|April 19, 2021
PubMed
Summary
This summary is machine-generated.

Odors can influence how pleasant virtual reality scenes seem. Congruent odors made virtual reality scenarios more memorable and pleasant, especially the rose odor in its matching environment.

Keywords:
immersionmultisensorialnoseodor memorysmellvirtual reality

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Area of Science:

  • Psychology
  • Neuroscience
  • Virtual Reality

Background:

  • Sensory perception research explores how different senses interact.
  • Virtual reality (VR) offers immersive environments for studying perception.
  • The influence of olfaction on visual scene perception is an area of growing interest.

Purpose of the Study:

  • To investigate if odors influence the perception of virtual reality (VR) scenes.
  • To examine the effects of congruent versus incongruent odor-visual pairings on scene perception and memory.
  • To assess how odor pleasantness and intensity ratings are affected by VR context.

Main Methods:

  • Ninety healthy participants experienced VR environments (rose garden, orange basket) with congruent, incongruent, or no odors.
  • Participants described scenes, rated pleasantness, and rated odor intensity and pleasantness.
  • A second test assessed recall and ratings without odor or VR exposure.

Main Results:

  • Virtual scenarios were remembered as more pleasant when paired with congruent odors.
  • Participants used more descriptive words for congruent scenarios compared to incongruent ones.
  • Rose odor was rated as more pleasant when presented in the congruent rose garden VR environment.

Conclusions:

  • Olfactory stimuli can modulate the perceived pleasantness of visual scenes in VR.
  • Congruent odors enhance the positive perception and descriptiveness of virtual environments.
  • Odor-visual congruence impacts perception but not necessarily long-term memorization of the visual scene itself.