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Updated: Jun 11, 2026
08:59
Ex Vivo Preparations of the Intact Vomeronasal Organ and Accessory Olfactory Bulb
Published on: August 4, 2014
The rodent accessory olfactory system.
1Department of Human Anatomy and Physiology, University of Padova, Padova, Italy. carla.mucignat@unipd.it
Summary
The accessory olfactory system, including the vomeronasal organ, processes environmental chemical cues. It influences brain responses, potentially integrating with the main olfactory system for complex chemosensory perception.
Area of Science:
- Neuroscience
- Sensory Biology
- Olfaction Research
Background:
- The accessory olfactory system detects chemical signals, playing a role in environmental perception.
- It comprises the vomeronasal organ and central projections to the amygdala, hypothalamus, and cortex.
Purpose of the Study:
- To review the structure of the accessory olfactory system.
- To detail the stimuli activating this system and the resulting neural responses.
- To explore the integration of accessory and main olfactory system inputs.
Main Methods:
- Literature review of studies on the accessory olfactory system.
- Analysis of vomeronasal organ receptor sensitivity.
- Examination of central processing pathways and brain responses.
Main Results:
- The vomeronasal organ detects volatile and nonvolatile molecules, including pheromones.
- Accessory olfactory bulb activity is modulated by centrifugal projections.
- Processing in the amygdala involves main olfactory system input, leading to prolonged responses and potential hypothalamic-hypophyseal axis activation.
Conclusions:
- The accessory olfactory system is crucial for chemosensory perception.
- Integration with the main olfactory system allows for complex, combined sensory experiences.
- This system influences hormonal pathways and long-term neural responses.
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