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Updated: Jun 10, 2026
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Testing for Odor Discrimination and Habituation in Mice
Published on: May 5, 2015
Olfactory bulb habituation to odor stimuli
Dipesh Chaudhury1, Laura Manella, Adolfo Arellanos
1Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14853, USA.
Behavioral Neuroscience
|August 11, 2010
Summary
Habituation, a simple memory form, involves olfactory bulb processes. N-methyl-d-aspartate receptors in the olfactory bulb are crucial for both behavioral and neuronal odor habituation.
Area of Science:
- Neuroscience
- Olfactory System Research
- Memory Mechanisms
Background:
- Habituation is a basic form of memory with incompletely understood neurobiological mechanisms in mammals.
- Olfactory habituation at short timescales (seconds) involves synaptic adaptation in the olfactory cortex.
- Longer-timescale olfactory habituation (minutes) is linked to olfactory bulb processes, suggested by pharmacological studies.
Purpose of the Study:
- To investigate the neurobiological basis of long-timescale olfactory habituation in the olfactory bulb.
- To identify neuronal activity correlates of behavioral habituation to odors in the rat olfactory bulb.
- To determine the role of N-methyl-d-aspartate (NMDA) receptors in olfactory bulb-mediated habituation.
Main Methods:
- Recording of mitral cell spiking responses in the rat olfactory bulb.
- Repeated odorant stimulation with 5-minute intertrial intervals.
- Pharmacological assessment of N-methyl-d-aspartate receptor involvement.
Main Results:
- Mitral cell spiking responses in the olfactory bulb exhibit adaptation and recovery mirroring behavioral habituation patterns.
- The time course of neuronal adaptation and recovery aligns with behavioral habituation.
- Both behavioral and neuronal aspects of odor habituation are dependent on functional NMDA receptors within the olfactory bulb.
Conclusions:
- Neuronal activity in the olfactory bulb correlates with long-timescale behavioral habituation to odors.
- N-methyl-d-aspartate receptors in the olfactory bulb play a critical role in mediating odor habituation.
- This study elucidates the neurobiological underpinnings of olfactory memory at the level of the olfactory bulb.
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