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Related Concept Videos

Olfaction01:25

Olfaction

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...
Physiology of Smell and Olfactory Pathway01:20

Physiology of Smell and Olfactory Pathway

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...
Olfactory Receptors: Location and Structure01:03

Olfactory Receptors: Location and Structure

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...
Pollination and Flower Structure02:40

Pollination and Flower Structure

Flowers are the reproductive, seed-producing structures of angiosperms. Typically, flowers consist of sepals, petals, stamens, and carpels. Sepals and petals are the vegetative flower organs. Stamens and carpels are the reproductive organs.

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Single Sensillum Recordings for Locust Palp Sensilla Basiconica
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Published on: June 23, 2018

Evolution of insect olfaction.

Bill S Hansson1, Marcus C Stensmyr

  • 1Department of Evolutionary Neuroethology, Max Planck Institute for Chemical Ecology, Hans Knoell Strasse 8, 07749 Jena, Germany. hansson@ice.mpg.de

Neuron
|December 14, 2011
PubMed
Summary
This summary is machine-generated.

Neuroethology studies how animal brains process behaviors in their environment. This review explores insect olfaction, revealing how ecology shapes neural systems and olfactory evolution.

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Area of Science:

  • Neuroethology
  • Sensory Neuroscience
  • Evolutionary Biology

Background:

  • Neuroethology investigates neural mechanisms underlying natural behaviors within ecological contexts.
  • Comparative analyses reveal adaptive and evolutionary trends in nervous system structure and function.
  • Insect olfaction serves as a model system for understanding sensory processing and evolution.

Purpose of the Study:

  • To review the application of neuroethological principles to insect olfaction.
  • To discuss how ecological factors influence insect olfactory neurobiology.
  • To provide insights into olfactory evolution and broader sensory processing.

Main Methods:

  • Literature review focusing on neuroethology and insect olfaction.
  • Comparative analysis of olfactory systems across insect species.
  • Examination of ecological and evolutionary pressures on neurobiology.

Main Results:

  • Ecological niche and selective pressures significantly shape insect olfactory neurobiology.
  • Neuroethological approaches illuminate adaptive evolution in sensory systems.
  • Insect olfaction provides a framework for understanding general principles of sensory processing.

Conclusions:

  • Neuroethology offers valuable insights into the evolution of sensory systems, particularly insect olfaction.
  • Understanding insect olfactory neurobiology enhances our knowledge of sensory processing and adaptation.
  • The interplay between ecology and neurobiology is crucial for evolutionary understanding.