Modeling the development of panic disorder with interoceptive conditioning.

Area of Science:

• Psychology
• Psychophysiology
• Neuroscience

Background:

• Panic disorder involves sudden, intense fear of bodily sensations.
• Interoceptive conditioning, where bodily sensations become associated with fear, is a proposed mechanism in panic disorder.
• Anxiety sensitivity is a known risk factor for panic disorder.

Purpose of the Study:

• To model the initial stages of interoceptive fear conditioning in healthy individuals.
• To investigate how anxiety sensitivity influences this learning process.
• To understand the development of panic disorder through impaired discriminatory learning.

Main Methods:

• A differential interoceptive conditioning paradigm was used with 44 healthy volunteers.
• Mild cardiac sensations (induced by pentagastrin) and saline served as conditioned stimuli (CS).
• Carbon dioxide (CO2) inhalation served as the unconditioned stimulus (UCS) to elicit panicogenic sensations.

Main Results:

• Participants in the 'prepared' group, who received CO2 after pentagastrin, learned to expect the UCS.
• Higher anxiety sensitivity scores correlated with impaired differential learning.
• Expectancy learning was stronger for the presence of cardiac sensations than for their absence.

Conclusions:

• Interoceptive conditioning can model early stages of panic disorder development in healthy individuals.
• Anxiety sensitivity significantly modulates fear learning, impairing discrimination.
• Findings provide novel insights into the mechanisms underlying panic disorder.