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Brain correlates of an unexpected panic attack: a human positron emission tomographic study
H Fischer1, J L Andersson, T Furmark
1Department of Psychology, Uppsala University, Sweden. hakan.fischer@psyk.uu.se
Neuroscience Letters
|August 27, 1998
Summary
Unexpected panic attacks in healthy individuals are linked to reduced brain blood flow in specific regions. This study used positron emission tomography to observe brain activity during a panic attack, offering new insights into panic anxiety.
Area of Science:
- Neuroscience
- Psychiatry
- Medical Imaging
Background:
- Panic anxiety research often uses drug infusions or sensory stimulation to provoke panic attacks.
- Understanding the neural correlates of panic attacks in healthy individuals is crucial for developing effective treatments.
Purpose of the Study:
- To investigate regional cerebral blood flow (rCBF) changes during an unexpected panic attack in a healthy volunteer.
- To identify specific brain regions affected during a naturally occurring panic attack.
Main Methods:
- Positron emission tomography (PET) was used to measure rCBF.
- The study involved a fear conditioning paradigm with electric shock presentations.
- A panic attack was unexpectedly triggered during the first conditioning run.
Main Results:
- A panic attack, meeting DSM-IV criteria, occurred unexpectedly.
- The panic attack was associated with decreased rCBF in the right orbitofrontal cortex (Brodmann area 11), prelimbic cortex (area 25), anterior cingulate cortex (area 32), and anterior temporal cortex (area 15).
Conclusions:
- Neural activity in specific brain regions is involved in panic attacks experienced by healthy individuals.
- These findings align with brain regions implicated in symptom provocation in specific phobias and posttraumatic stress disorder.