why do we have anxiety?
it’s our inbuilt threat system - designed to alert us
What is the physiology of anxiety?
Fight or flight response e.g. palpitations, shaking, sweating, nausea, dizziness etc
What behavioural consequences are there of anxiety?
desire to avoid or escape
What emotional consequences are there of anxiety?
Stress, worry, afraid, nervous, on edge
What cognitive consequences are there of anxiety?
How are anxiety disorders characterised?
What are the DSM-5 criteria for panic disorder?
How does the DSM-5 define a panic attack?
An abrupt surge of intense fear or intense discomfort that reaches a peak within minutes, and during which time 4 more symptoms occur.
The abrupt surge can occur from a calm state or an anxious state
What is the lifetime prevalence of panic disorder?
1.5-3.5%
What is the UK prevalence of panic disorder?
1.7%
What distinct feature is there of panic attacks that separates it from other anxiety disorders with panic attacks?
Intense fear of experiencing panic attacks
What biological theories are there of panic disorder?
What psychological theories are there of panic disorder?
What is hyperventilation?
a rapid form of breathing that results in ventilation exceeding metabolic demand and has an end result of raising blood pH levels. a common feature of panic attacks
What did Ley (1987) suggest about hyperventilation theory?
That shortness of breath & heart palpitations are the cause of panic attacks rathe than the effect.
- affects CO2 levels, resulting in a rise in pH levels producing mild symptoms
- continues to rise and passes a critical point where tolerance gives way to alarm and fear
- sympathetic nervous system takes over, further exacerbating panic symptoms
What evidence is there for Ley’s hyperventilation theory?
What did Klein (1993) suggest about hyperventilation theory?
Suffocation Alarm Theories
- panic attacks are due to a ‘suffocation monitor’ in the brain that mistakenly signals a lack of useful air, triggering the suffocation alarm system
- CO2 acts as a panic stimulus, suggesting suffocation may be imminent
- People prone to panic attacks have an oversensitive suffocation alarm system
What evidence is there for Klein’s suffocation alarm theory?
What is the noradrenergic overactivity theory?
People with panic disorder may have overactivity in the noradrenergic neurotransmitter system
What evidence is there for the noradrenergic overactivity theory?
What is the issue with the noradrenergic overactivity theory?
Is it a cause or effect?
How does classical conditioning explain panic disorder?
When stimuli, events or situations are paired with a panic attack, these conditioned stimuli then trigger panic when they are encountered again
Explain Clark’s Model of Panic Disorder
Trigger stimulus (internal or external) lead to perceived threats (e.g. i’m going to faint)
These perceived threats cause apprehensions (e.g. anxiety) and/or interpretations of physical sensations (e.g. thinking they’re having a heart attack).
These lead to physiological sensations (e.g. palpitations, sweating)
What is catastrophic misinterpretation?