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Updated: Jul 10, 2026
10:14
Whisker-signaled Eyeblink Classical Conditioning in Head-fixed Mice
Published on: March 30, 2016
Conditioned facilitation of the unconditioned reflex after classical eyeblink conditioning
1Department of Psychology, University of Tromsø, N-9037 Tromsø, Norway. olea@psyk.uit.no
Summary
This study shows that classical conditioning can speed up the unconditioned eyeblink reflex (UR). Conditioned eyeblink reflex facilitation indicates an early stage of learning.
Area of Science:
- Neuroscience
- Behavioral Psychology
- Classical Conditioning
Background:
- The unconditioned eyeblink reflex (UR) is a fundamental protective response.
- Classical conditioning is a learning process where a neutral stimulus becomes associated with a biologically relevant stimulus.
- Understanding the temporal dynamics of conditioned responses is crucial for elucidating learning mechanisms.
Purpose of the Study:
- To investigate the time-course of conditioned facilitation of the unconditioned eyeblink reflex (UR).
- To determine if conditioned facilitation of the UR reflects early stages of classical conditioning.
Main Methods:
- A single-cue delay classical conditioning procedure was used with 40 participants.
- A tone conditioned stimulus (CS) signaled an airpuff unconditioned stimulus (US).
- Eyeblink reflex facilitation was assessed using white noise US at various intervals (10-1000 ms) after CS onset.
Main Results:
- The paired group showed significantly increased URs as early as 100 ms after CS onset compared to the unpaired group.
- This reflex facilitation was positively correlated with the magnitude of the conditioned response (CR).
Conclusions:
- Conditioned facilitation of eyeblink URs occurs rapidly after CS onset.
- This facilitation indexes an early, automatic, and preattentive stage in conditioned response formation.
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