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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.
The olfactory receptors are embedded in the cilia of the...
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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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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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Motor and Sensory Areas of the Cortex01:14

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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
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Sensory Perception: Organization of the Somatosensory System01:11

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The somatosensory system is the central and peripheral nervous system component that senses and processes touch, pressure, pain, temperature, and body position or proprioception. The process of sensation takes place at three levels:
The receptor level:
The receptor level is the first stage of sensation. It involves the detection of a stimulus by specialized sensory receptors. The stimulus must arrive within the receptor's receptive field. Next, the receptor converts the energy of the...
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Intermittency coding in the primary olfactory system: a neural substrate for olfactory scene analysis.

Il Memming Park1, Yuriy V Bobkov, Barry W Ache

  • 1Department of Biomedical Engineering, Whitney Laboratory for Marine Bioscience, Center for Smell and Taste, McKnight Brain Institute, Department of Biology and Neuroscience, and Department of Electrical and Computer Engineering, University of Florida, Gainesville, Florida 32611.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|January 17, 2014
PubMed
Summary
This summary is machine-generated.

Lobster olfactory receptor neurons (bORNs) unexpectedly encode temporal odor signal patterns. This discovery reveals a novel peripheral mechanism crucial for olfactory scene analysis in animals.

Keywords:
bursting olfactory receptor neuroninterval estimationneural codingolfactory scene analysispoint processuncoupled oscillators

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Area of Science:

  • Neuroscience
  • Sensory Biology
  • Animal Behavior

Background:

  • Olfactory research traditionally focuses on odor quality and quantity, neglecting spatiotemporal dynamics.
  • Spatiotemporal information in odor plumes is crucial for animals' olfactory scene analysis.
  • Turbulent odor plume structures suggest significant spatiotemporal cues are available.

Purpose of the Study:

  • To investigate the spatiotemporal encoding capabilities of olfactory receptor neurons.
  • To explore the role of temporal properties in olfactory signal processing.
  • To identify novel mechanisms for olfactory scene analysis.

Main Methods:

  • Electrophysiological recordings from bursting olfactory receptor neurons (bORNs) in lobsters.
  • Analysis of neural responses to intermittent odor stimuli.
  • Theoretical modeling of peripheral olfactory encoding.

Main Results:

  • A subset of lobster bORNs exhibits the capacity to encode temporal features of intermittent odor signals.
  • Individual bORNs are tuned to specific stimulus interval ranges.
  • Collectively, bORNs can rapidly encode a broad spectrum of odor intermittencies.

Conclusions:

  • A novel peripheral neural mechanism for encoding odor temporal patterns exists.
  • This mechanism provides a potential neural substrate for olfactory scene analysis.
  • The findings challenge traditional views of olfactory processing by highlighting temporal encoding in the periphery.