Related Experiment Video
Updated: Jan 17, 2026
07:13
Author Spotlight: Exploring Glial Influence in Experience-Dependent Synaptic Pruning During Critical Periods
Published on: March 1, 2024
1.1K
Adaptive filters at the first olfactory synapse
Elizabeth H Moss1, Benjamin R Arenkiel2,3,4
1Department of Anesthesiology and Perioperative Medicine, Oregon Health & Science University, Portland, Oregon, United States of America.
Plos Biology
|September 17, 2025
Summary
The olfactory system filters scents using attention and learning. Short axon cells in the olfactory bulb dynamically regulate scent information by integrating brain signals.
Area of Science:
- Neuroscience
- Olfactory system function
- Sensory processing
Background:
- The olfactory system processes scent information, but the mechanisms for filtering relevant odors based on attention and learning are not fully understood.
- Short axon cells within the olfactory bulb play a role in modulating neural circuit activity.
Purpose of the Study:
- To investigate how the olfactory system dynamically regulates odor representations.
- To elucidate the role of short axon cells and cholinergic input in olfactory processing.
Main Methods:
- Analysis of neural circuits in the olfactory bulb.
- Investigating the integration of cholinergic input from the basal forebrain.
- Utilizing techniques to observe dynamic regulation of olfactory input.
Main Results:
- Short axon cells integrate cholinergic input, influencing olfactory processing.
- This integration allows for the dynamic regulation of odor representations based on attention and learning.
- Demonstrated a mechanism for attentional modulation within the olfactory bulb.
Conclusions:
- Cholinergic input to short axon cells is crucial for dynamically filtering olfactory information.
- The olfactory system exhibits adaptive filtering capabilities mediated by neural circuit plasticity.
Related Concept Videos
01:25Olfaction
48.2K
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...
48.2K
01:20Physiology of Smell and Olfactory Pathway
12.4K
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...
12.4K
01:03Olfactory Receptors: Location and Structure
11.2K
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...
11.2K
01:21G-Protein Gated Ion Channels
5.6K
GPCRs are primarily responsible for our sense of smell, taste, and vision. The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
Sensory...
5.6K