The classification of mental disorders using the DSM

The Diagnostic and Statistical Manual of Mental Disorders (DSM), published by the American Psychiatric Association, serves as a key tool for identifying and categorising mental health conditions. It is regularly updated to reflect the latest research and provides a structured approach to diagnosis.

Key features and purposes of the DSM

• Defined diagnostic criteria - The DSM lists specific symptoms for each disorder, acting as a guide for professionals to diagnose conditions accurately.
• Descriptive diagnosis - It offers a clear, detailed framework that makes diagnoses consistent and objective.
• Data collection for research - By standardising classifications, the DSM enables the gathering of data on disorders, which supports the development of new treatments and medications.
• Criticism of classification - Some argue that the DSM can stigmatise individuals by labelling them and placing them into rigid categories, potentially overlooking their unique experiences.

Characteristics and types of depression as a mood disorder

Depression falls under the category of mood disorders, which are defined by intense emotional states that can disrupt normal functioning. These disorders impact how individuals perceive the world, think, and behave.

Types of depression

• Major depression (unipolar disorder) - Characterised by sudden, intense episodes of low mood. It can be:
  • Reactive - Triggered by external events, such as losing a loved one.
  • Endogenous - Stemming from internal causes, like neurological imbalances.
• Manic depression (bipolar disorder) - Involves alternating periods of extreme highs (mania) and lows (depression).
  • Manic episodes - Feature overactivity, rapid speech, and extreme happiness or agitation.
  • Depressive episodes - Mirror the symptoms of major depression.
  • These mood swings often follow predictable cycles over days or weeks.

Clinical characteristics of depression

For a diagnosis of major depression, the DSM requires at least five of the following symptoms to be present nearly every day for a minimum of two weeks.

These symptoms are:

• Physical/behavioural symptoms - Sleep issues (insomnia or hypersomnia), changes in appetite (leading to weight gain or loss), unexplained pain (e.g., headaches or muscle aches), reduced activity (social withdrawal and loss of interest in intimacy).
• Cognitive symptoms - Persistent negative thoughts about self-worth, suicidal ideation, slowed thinking (struggling with focus and decisions).
• Affective/emotional symptoms - Overwhelming sadness, hopelessness, despair, mood fluctuations throughout the day (often worse in the morning), and anhedonia (loss of enjoyment in previously pleasurable activities).

Characteristics and types of phobias as anxiety disorders

Phobias are a form of anxiety disorder marked by an intense, irrational fear of specific objects or situations. These fears significantly affect daily life and are disproportionate to any real threat.

Types of phobias classified by the DSM

• Specific phobias - Fear tied to particular objects or scenarios, divided into five subtypes:
  • Animal type - Fear of creatures like snakes or insects (also termed zoophobia).
  • Environmental dangers type - Fear of natural elements, such as storms or deep water.
  • Blood-injection-injury type - Fear of medical procedures, like injections or seeing blood.
  • Situational type - Fear of specific settings, such as confined spaces or high places.
  • Other type - Any fear not covered by the above categories.
• Agoraphobia - Fear of situations like open spaces, public transport, crowds, or being away from home, driven by the dread of being unable to escape or get help during distressing moments. This often leads to avoidance behaviours and can stem from other phobias.
• Social anxiety disorder (social phobia) - Fear of social settings, such as public speaking or dining in front of others, due to concerns about judgement or embarrassment.

Clinical characteristics of phobias

• Cognitive - Irrational thoughts about the feared stimulus, preoccupation with anxiety, and difficulty focusing.
• Behavioural - Avoidance of anxiety-provoking situations (especially in social phobia or agoraphobia), attempts to escape when confronted with the fear, general restlessness, and being easily startled.
• Physical - Activation of the fight-or-flight response upon encountering or thinking about the feared stimulus, including adrenaline release, elevated heart rate, rapid breathing, and muscle tension.
• Emotional - Intense anxiety and a pervasive sense of dread.

Diagnostic criteria for phobias

According to the DSM, a fear qualifies as a phobia if it meets these conditions:

1. A marked, persistent fear of an object or situation lasting over six months.
2. An immediate anxiety response (e.g., increased heart rate) when exposed to the stimulus.
3. The fear is excessive compared to any real danger posed.
4. Significant efforts are made to avoid the stimulus.
5. The phobia interferes with daily life, such as avoiding social or work-related situations.

Characteristics and components of obsessive-compulsive disorder (OCD)

Obsessive-compulsive disorder (OCD) is a mental health condition affecting approximately 2% of the global population, typically emerging in late teens or early adulthood. It impacts men and women equally across all ethnic groups and consists of two main elements: obsessions and compulsions, often interconnected.

Obsessions: the cognitive aspect of OCD

Obsessions are recurring, intrusive thoughts, images, or urges that cause significant distress. They form the internal component of OCD.

The DSM specifies the following criteria for obsessions:

• Unwanted, persistent thoughts or images that provoke anxiety, such as fears of leaving appliances on or harming loved ones.
• Active attempts to suppress or ignore these thoughts, which are ultimately unsuccessful.
• The thoughts are not induced by substances like drugs.

Compulsions: the behavioural aspect of OCD

Compulsions are repetitive physical or mental actions performed to alleviate the anxiety caused by obsessions. They represent the external component of OCD.

The DSM outlines these diagnostic criteria:

• Repetitive behaviours or mental acts linked to an obsession, often following strict self-imposed rules, such as checking locks multiple times or repeating specific phrases.
• Actions aimed at reducing anxiety or preventing a feared outcome, though they are excessive or unlikely to prevent the feared event.
• Not caused by substances like drugs.

The DSM indicates a clinical case of OCD if obsessions or compulsions consume at least one hour per day or significantly disrupt relationships, work, or social activities.

Emotional impact of OCD

• Anxiety from obsessions - The intrusive thoughts often generate intense worry or distress.
• Temporary relief from compulsions - Performing compulsive acts may briefly reduce anxiety, but the relief is short-lived, leading to a recurring cycle of obsession and compulsion.

Common types of OCD behaviours

• Checking - Repeatedly ensuring things are secure, such as verifying that doors are locked or personal items are in place.
• Contamination fears - Intense worry about germs or dirt from everyday interactions, like touching public surfaces or shaking hands.
• Hoarding - Accumulating unnecessary or worn-out items, such as old magazines or clutter.
• Symmetry and orderliness - Needing objects arranged in a precise way, for example, aligning items on a shelf or desk to exact specifications.