Skip to main content

Advertisement

Table 1 Levels of baseline (pre-CS) percent freezing across testing phases

From: Temporal factors in the extinction of fear in inbred mouse strains differing in extinction efficacy

    S1    B6  
Varying conditioning-extinction training interval    
  Cond Extinction Retrieval Cond Extinction Retrieval
Immediate 0.0 ±0.0 15.1 ±22.0 10.2 ±15.7 0.0 ±0.0 16.1 ±23.3 5.0 ±3.1
Delayed 0.0 ±0.0 6.4 ±10.3 10.9 ±13.5 0.0 ±0.0 2.8 ±3.9 2.2 ±3.2
Varying interval between extinction cues (3-shock cond)    
  Cond Extinction Retrieval Cond Extinction Retrieval
Spaced 0.0 ±0.0 0.7 ±1.3 2.1 ±2.0 0.2 ±0.8 4.7 ±3.5 3.0 ±2.6
10-trial massed 0.0 ±0.0 4.6 ±3.2 2.6 ±1.9 0.4 ±1.1 5.7 ±3.6 3.2 ±3.8
50-trial massed 0.0 ±0.0 1.7 ±2.5 3.5 ±3.6 0.0 ±0.0 2.4 ±2.3 1.7 ±2.5
Varying interval between extinction cues (1-shock cond)    
  Cond Extinction Retrieval Cond Extinction Retrieval
Spaced 0.0 ±0.0 1.2 ±2.9 3.0 ±3.6 0.0 ±0.0 2.3 ±3.3 3.0 ±2.6
Massed 0.0 ±0.0 0.5 ±1.2 2.0 ±2.4 0.0 ±0.0 4.4 ±3.0 1.2 ±3.2
Single-CS exposure prior to extinction training    
  Cond Extinction Test Cond Extinction Test
CS 0.0 ±0.0 9.2 ±9.1 29.4 ±18.9 0.0 ±0.0 11.1 ±17.5 33.9 ±22.9
No CS 0.0 ±0.0 19.4 ±18.2 35.6 ±19.9 0.0 ±0.0 5.6 ±13.9 18.6 ±16.9
Extinction of a second-order conditioned cue    
  Cond Extinction Retrieval 2nd Cond Extinction Retrieval
CS2 x CS1 0.4 ±0.7 0.0 ±0.0 0.0 ±0.0 0.1 ±0.4 0.0 ±0.0 0.0 ±0.0
CS2 only 0.4 ±0.9 0.0 ±0.0 0.0 ±0.0 0.0 ±0.0 0.0 ±0.0 0.0 ±0.0