Related Experiment Video
Updated: Mar 22, 2026
07:13
Modified Experimental Conditions for Noise-Induced Hearing Loss in Mice and Assessment of Hearing Function and Outer Hair Cell Damage
Published on: February 10, 2023
3.0K
Plastic Change in the Auditory Minimum Threshold Induced by Intercollicular Effects in Mice.
Hui-Xian Mei1, Jia Tang2, Zi-Ying Fu2
1School of Life Sciences and Hubei Key Lab of Genetic Regulation and Integrative Biology, Central China Normal University, Wuhan 430079, China; School of Sport, Hubei University, Wuhan 430062, China.
Neural Plasticity
|April 9, 2016
Summary
Intercollicular effects modulate auditory responses in the brainstem by altering neuronal thresholds. These changes are experience-dependent and suggest plasticity in sound processing.
Area of Science:
- Neuroscience
- Auditory System Research
- Signal Processing
Background:
- The inferior colliculus (IC) in the dorsal midbrain integrates auditory information.
- Interconnections between the two ICs via the commissure suggest potential for intercollicular interactions.
- Understanding these interactions is crucial for deciphering auditory processing and plasticity.
Purpose of the Study:
- To investigate the effects of intercollicular stimulation on auditory responses in the IC.
- To determine if these effects induce plastic changes in neuronal properties, specifically the minimum threshold (MT).
- To explore the factors influencing these plastic changes, such as best frequency (BF) and MT differences.
Main Methods:
- Focal electrical stimulation of one IC for 30 minutes.
- Recording auditory responses and minimum thresholds (MT) of neurons in both ICs.
- Analyzing changes in MT based on BF and MT differences between neurons.
Main Results:
- Intercollicular stimulation induced inhibitory or facilitatory effects on auditory responses.
- Plastic changes in MT were observed, with shifts dependent on BF and MT differences.
- Larger MT shifts occurred with smaller BF differences (≤2 kHz) and greater MT differences.
- These MT shifts were transient, returning to baseline within approximately 150 minutes.
- Interactions were found to be reciprocal or unilateral.
Conclusions:
- Intercollicular effects play a role in modulating auditory responses within the IC.
- These findings suggest acoustic experience-dependent plasticity in the MT of IC neurons.
- The commissure of the IC is a key structure for mediating these plastic changes in auditory processing.
