Related Experiment Video
Updated: May 14, 2026

Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
Published on: October 11, 2017
Tone-detection training enhances spectral integration mediated by intracortical pathways in primary auditory cortex
Fei Guo1, Irakli Intskirveli, David T Blake
1Department of Neurobiology and Behavior and Center for Hearing Research, University of California, Irvine, CA 92697, USA.
Auditory training enhances neural responses in the primary auditory cortex (A1) by strengthening intracortical pathways. This plasticity in specific layers correlates with improved auditory learning and performance.
Area of Science:
- Neuroscience
- Auditory Neuroscience
- Systems Neuroscience
Background:
- Experience-dependent plasticity in the primary auditory cortex (A1) is crucial for auditory learning.
- The precise mechanisms and functional consequences of this plasticity remain incompletely understood.
Purpose of the Study:
- To investigate how auditory-cued behavioral training alters functional connectivity within the primary auditory cortex (A1).
- To determine the impact of training on thalamocortical and intracortical inputs by analyzing current-source density (CSD) receptive fields.
- To correlate behavioral performance with neural plasticity in A1.
Main Methods:
- Adult rats were trained to detect a specific auditory target frequency.
- Current-source density (CSD) profiles and receptive fields were recorded in different regions of A1 using multi-electrode probes.
- CSD receptive fields were analyzed for laminar and spectral changes in response to auditory stimuli.
Main Results:
- Behavioral training significantly altered CSD receptive fields in the 10 kHz characteristic frequency (CF) region of A1, but not the 20 kHz CF region.
- At the 10 kHz site, target-frequency-evoked current sinks were enhanced in layer 2/3, while layer 4 remained unchanged.
- A significant correlation was found between the development of behavioral sensitivity (d') and the amplitude of target-evoked current sinks in layer 2/3.
Conclusions:
- Auditory training induces plasticity primarily along intracortical pathways connecting the target representation with adjacent cortical areas.
- Enhanced responses in superficial layers (2/3) of A1 are associated with improved auditory learning.
- Intracortical plasticity plays a significant role in auditory skill acquisition.
More Related Videos
11:39Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique
Published on: September 7, 2022
08:43Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
Published on: October 22, 2015
Related Concept Videos
Auditory Pathway
When viewed cross-sectionally, the cochlea reveals the scala vestibuli and scala tympani flanking the...
Hearing
The Cochlea
Motor and Sensory Areas of the Cortex
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Auditory Perception