Bilateral destruction of neocortical and perirhinal projection targets of the acoustic thalamus does not disrupt auditory fear conditioning

The present study examined whether complete bilateral destruction of auditory cortex would interfere with auditory fear conditioning in rats. Complete destruction of auditory cortex required lesions of temporal neocortical and perirhinal periallocortical areas. Fear conditioning was assessed by meas...

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Veröffentlicht in:Neuroscience letters 1992-08, Vol.142 (2), p.228-232
Hauptverfasser: Romanski, Lizabeth M., LeDoux, Joseph E.
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description The present study examined whether complete bilateral destruction of auditory cortex would interfere with auditory fear conditioning in rats. Complete destruction of auditory cortex required lesions of temporal neocortical and perirhinal periallocortical areas. Fear conditioning was assessed by measuring freezing and arterial pressure responses elicited by an acoustic stimulus after pairing with footshock. Animals with complete bilateral lesions of auditory cortex showed conditioned arterial pressure and freezing responses comparable to those of unoperated controls. In contrast, bialteral destruction of the acoustic thalamus interfered with the conditioning of both responses. These results demonstrate that the auditory cortex is not required for the conditioning of fear responses to simple acoustic stimuli and add to the growing body of evidence that fear conditioning can be mediated by subcortical (amygdaloid) projections of the acoustic thalamus.
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Psychology</subject><subject>Male</subject><subject>Medial geniculate</subject><subject>Perirhinal cortex</subject><subject>Psychology. Psychoanalysis. Psychiatry</subject><subject>Psychology. 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source MEDLINE; Access via ScienceDirect (Elsevier)
subjects Acoustic Stimulation
Amygdala
Anatomical correlates of behavior
Animals
Auditory
Auditory cortex
Auditory Cortex - physiology
Auditory Pathways - physiology
Behavior, Animal - physiology
Behavioral psychophysiology
Biological and medical sciences
Blood Pressure - physiology
Classical conditioning
Conditioning, Classical - physiology
Cortico-amygdala
Electroshock
Fear - physiology
Fear conditioning
Fundamental and applied biological sciences. Psychology
Male
Medial geniculate
Perirhinal cortex
Psychology. Psychoanalysis. Psychiatry
Psychology. Psychophysiology
Rats
Rats, Sprague-Dawley
Temporal Lobe - physiology
Thalamoamygdala
Thalamus - physiology
title Bilateral destruction of neocortical and perirhinal projection targets of the acoustic thalamus does not disrupt auditory fear conditioning
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