Biogenic vs. Psychogenic
Originating from biological factors vs. psychological experiences
The global diagnostic system
ICD-11
Mental disorder
Clinically significant psychological/behavioral syndrome causing distress, disability, or risk
Essential vs associated features
Core defining characteristics of a disorder vs common but not required symptoms
Differential diagnosis
The process of determining which of two or more diseases or disorders with overlapping symptoms a particular patient has.
Continuum of behaviour
Psychological symptoms exist on a spectrum from normal to pathological
Anxiety
Normal fear response that becomes disordered when excessive and impairing
Panic Attack
Sudden intense fear with physical and cognitive symptoms
Agoraphobia
Fear of situations where escape/help may be difficult. Public transport, open or enclosed spaces, crowds, or being alone outside home.
Panic Disorder
Recurrent unexpected panic attacks + fear of future attacks
Generalized Anxiety Disorder
Excessive uncontrollable worry for ≥6 months
Phobia
Persistent, disproportionate fear of a specific object/situation
Social Anxiety Disorder
Fear of social scrutiny and evaluation
Obsessive Compulsive Disorder
Obsessions (intrusive thoughts) + compulsions (repetitive behaviors to reduce anxiety)
Obsessions
Intrusive and unwanted thoughts
Compulsions
Repetitive behaviours/mental acts to reduce anxiety
OCD Insight
Awareness of irrationality of beliefs (varies from good to absent)
PTSD
Disorder following exposure to severe trauma with symptoms lasting >1 month
Intrusion Symptoms
Flashbacks, nightmares, intrusive memories
Avoidance
Avoiding trauma-related thoughts or reminders
Negative Cognition and Mood Changes
Memory issues, negative beliefs, emotional numbness
Arousal and Reactivity Changes
Hypervigilance, irritability, sleep issues, startle response
Mood Disorders
Disorders involving prolonged disturbances in mood
Major Depressive Episode
≥5 symptoms over 2 weeks including depressed mood or loss of interest