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Related Concept Videos

Olfaction01:25

Olfaction

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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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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.
The olfactory...
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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
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Olfactory Receptors: Location and Structure01:03

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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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Prosopagnosia01:24

Prosopagnosia

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Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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Socioemotional Development during Infancy01:30

Socioemotional Development during Infancy

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Socio-emotional development in infancy is primarily shaped by early emotional responses and social connections, with temperament playing a central role. Temperament refers to the consistent patterns in an individual's emotional and behavioral responses, observable even in infancy. By examining temperament, researchers can better understand an infant's unique ways of interacting with the world, influencing subsequent personality and socio-emotional growth.
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Related Experiment Video

Updated: Nov 5, 2025

Experience is Instrumental in Tuning a Link Between Language and Cognition: Evidence from 6- to 7- Month-Old Infants' Object Categorization
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Experience is Instrumental in Tuning a Link Between Language and Cognition: Evidence from 6- to 7- Month-Old Infants' Object Categorization

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Odor-driven face-like categorization in the human infant brain.

Diane Rekow1, Jean-Yves Baudouin2, Fanny Poncet3

  • 1Developmental Ethology and Cognitive Psychology Lab, Centre des Sciences du Goût et de l'Alimentation, CNRS, Université Bourgogne Franche-Comté, National Research Institute for Agriculture, Food and Environment, AgroSup Dijon, 21000 Dijon, France; diane.rekow@u-bourgogne.fr arnaud.leleu@u-bourgogne.fr.

Proceedings of the National Academy of Sciences of the United States of America
|May 18, 2021
PubMed
Summary
This summary is machine-generated.

Maternal scent enhances infant brain

Keywords:
EEG frequency taggingface pareidoliafast periodic visual stimulationinfancymaternal body odor

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Sensory Processing

Background:

  • Infant brains process complex sensory information.
  • Early visual categorization is crucial for development.
  • The role of non-visual senses in infant categorization is understudied.

Purpose of the Study:

  • To investigate if maternal odor influences visual face-like categorization in infants.
  • To explore the role of olfaction in early visual perception.
  • To understand multisensory integration in the developing brain.

Main Methods:

  • Electroencephalogram (EEG) recorded from 20-4-month-old infants.
  • Presentation of object images, including face-like configurations, at 6 Hz.
  • Exposure to either a baseline odor or maternal body odor.

Main Results:

  • Maternal odor amplified neural responses to face-like stimuli.
  • Face-like categorization became right-lateralized with maternal odor.
  • Olfaction influenced visual categorization, particularly in naive infants.

Conclusions:

  • Maternal body odor shapes infant interpretation of face-like stimuli.
  • Early olfactory experiences tune visual categorization in the infant brain.
  • Multisensory integration is key for efficient perceptual development.