Related Experiment Video
Updated: Jan 10, 2026
08:29
The Olfactory System as a Model to Study Axonal Growth Patterns and Morphology In Vivo
Published on: October 30, 2014
11.3K
Immature olfactory sensory neurons provide complementary input in the healthy olfactory system
Jordan D Gregory1,2, Ryan S Herzog1,2, Kendall A Curtis1
1Department of Neurobiology, University of Pittsburgh School of Medicine, Pittsburgh PA 15213.
Biorxiv : the Preprint Server for Biology
|November 24, 2025
Summary
Immature olfactory sensory neurons (OSNs) are crucial for odor detection in mice. Silencing these neurons impairs odor detection but not discrimination, revealing their unique role in the olfactory system.
Area of Science:
- Neuroscience
- Olfactory System Biology
- Sensory Neuron Development
Background:
- Adult neurogenesis in the rodent olfactory system offers insights into neuronal integration and behavior.
- Immature olfactory sensory neurons (OSNs) express odorant receptors (ORs) and project to the olfactory bulb (OB).
- Immature OSNs exhibit distinct response properties, suggesting a unique input stream to the olfactory bulb.
Purpose of the Study:
- To investigate the role of immature OSNs in odor-guided behavior within a healthy, intact olfactory system.
- To determine how immature OSNs contribute to odor detection and discrimination.
- To understand the functional impact of immature OSNs on olfactory bulb neural activity.
Main Methods:
- Chemogenetic silencing of immature olfactory sensory neurons in male and female mice.
- Behavioral assays for odor detection and discrimination.
- In vivo measurement of odor-evoked dendritic calcium responses in olfactory bulb neurons.
Main Results:
- Silencing immature OSNs impaired odor detection ability but did not affect odor discrimination.
- Immature OSN silencing reduced the amplitude of odor-evoked calcium responses in olfactory bulb neurons.
- These findings highlight a distinct contribution of immature OSNs to olfactory processing.
Conclusions:
- Immature OSNs provide a unique odor input stream that complements mature OSN input.
- This distinct input is essential for effective odor detection in the intact olfactory system.
- Immature OSNs play a significant role in mediating odor-guided behaviors.
More Related Videos
10:11In-depth Physiological Analysis of Defined Cell Populations in Acute Tissue Slices of the Mouse Vomeronasal Organ
Published on: September 10, 2016
8.0K
10:42A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
Published on: August 18, 2014
9.3K
Related Concept Videos
01:25Olfaction
48.0K
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...
48.0K
01:20Physiology of Smell and Olfactory Pathway
12.2K
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...
12.2K
01:03Olfactory Receptors: Location and Structure
11.1K
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...
11.1K
01:26Introduction to Special Senses
7.3K
Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
7.3K
01:31What is a Sensory System?
100.6K
Sensory systems detect stimuli—such as light and sound waves—and transduce them into neural signals that can be interpreted by the nervous system. In addition to external stimuli detected by the senses, some sensory systems detect internal stimuli—such as the proprioceptors in muscles and tendons that send feedback about limb position.
100.6K
00:50Unrenewable Cells
2.9K
In humans, the photoreceptor cells of the eye and sensory hair cells of the ear lack stem cells. These cells are thus unrenewable and cannot be replaced when they are damaged or destroyed.
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
Photoreceptors
The retina is composed of several layers and contains specialized cells called photoreceptors. The photoreceptors (rods and cones) change their membrane potential when stimulated by light energy. There are two types of photoreceptors—rods and cones—which differ in the shape of...
2.9K