Related Experiment Video
Updated: Jul 1, 2026
10:42
A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
Published on: August 18, 2014
A lateral look at olfactory bulb lateral inhibition
Matthew T Valley1, Stuart Firestein
1Department of Biological Sciences, Columbia University, New York, NY 10027, USA.
Neuron
|September 13, 2008
Summary
Lateral inhibition enhances sensory perception by filtering signals. In the olfactory bulb, this process selectively targets sparse neuron groups, irrespective of their spatial arrangement.
Area of Science:
- Neuroscience
- Olfactory system function
- Sensory processing
Background:
- Lateral inhibition is a common mechanism for contrast enhancement in sensory systems.
- Spatial filtering via lateral inhibition is widely assumed to underlie this process.
Discussion:
- Fantana et al. challenge the traditional view of spatial filtering in lateral inhibition.
- Their findings suggest a more nuanced mechanism within the olfactory bulb.
Key Insights:
- Lateral inhibition in the olfactory bulb operates selectively between sparse principal neuron populations.
- This selectivity occurs independently of the spatial relationships between these neurons.
Outlook:
- This research opens new avenues for understanding olfactory coding and neural computation.
- Further studies may elucidate the precise molecular and cellular underpinnings of this non-spatial lateral inhibition.
Related Concept Videos
01:25Olfaction
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...
The olfactory receptors are embedded in the cilia of the...
01:03Olfactory 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...
01:20Physiology 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...
The olfactory...