The DSM classification system and its criticisms

The classification of mental disorders involves grouping conditions based on shared symptoms to aid diagnosis and treatment. One key system is the DSM, which provides a structured approach to identifying disorders.

Key features of the DSM

The DSM, or Diagnostic and Statistical Manual of Mental Disorders, is produced by the American Psychiatric Association and regularly updated based on emerging research. It classifies mental disorders by providing specific diagnostic criteria, such as lists of symptoms that must be present for a diagnosis. This system makes diagnoses more objective and descriptive, enabling the collection of data on disorders that can inform the development of effective treatments.

Criticisms of classification systems

• Stigmatisation - Labelling individuals with a disorder can lead to negative stereotypes and social exclusion.
• Overlooking individuality - Placing people into predefined categories may ignore unique personal experiences and circumstances.
• Artificial groupings - Disorders are often grouped based on symptoms that may not fully capture the complexity of mental health, potentially leading to oversimplification.

Characteristics of mood disorders including depression and bipolar

Mood disorders involve intense emotions that disrupt normal functioning, affecting how individuals perceive the world, think, and behave. These conditions are among the most prevalent mental health issues.

Major depressive disorder

Major depressive disorder, also known as unipolar depression, features sudden episodes of low mood that can arise without warning. It may be reactive, triggered by external events like the end of a significant relationship, or endogenous, stemming from internal factors such as brain chemistry imbalances. For a diagnosis, at least five symptoms must persist nearly every day for a minimum of two weeks.

Symptoms of depression:

• Physical and behavioural symptoms - These include sleep issues such as insomnia or excessive sleeping, appetite changes leading to overeating or undereating, unexplained pains like headaches or muscle aches, reduced activity levels including social isolation, and diminished interest in sexual activity.
• Cognitive symptoms - Individuals often hold ongoing negative views about themselves and their capabilities, experience suicidal ideation, and face slowed thinking processes that make concentration and decision-making challenging.
• Affective and emotional symptoms - Common experiences involve profound sadness, feelings of hopelessness and despair, mood fluctuations throughout the day (diurnal variation), and anhedonia, where previously enjoyable activities no longer bring pleasure.

Bipolar disorder

Bipolar disorder is characterised by shifts between two extreme moods: depression and mania, often following predictable cycles. Manic episodes feature hyperactivity, rapid talking, and intense feelings of euphoria or irritability. Unlike unipolar depression, bipolar involves these alternating states, which can severely impact daily life.

Types and clinical characteristics of phobias

Phobias are a form of anxiety disorder marked by an intense, irrational fear of specific objects or situations that provoke significant distress and avoidance behaviours.

Main types of phobias

Phobias are categorised into several types based on the nature of the feared stimulus:

1. Specific phobias - These focus on particular objects or scenarios and include subtypes such as:

   • Animal type (e.g., fear of snakes or spiders).
   • Environmental dangers type (e.g., fear of storms or water).
   • Blood-injection-injury type (e.g., fear of needles or surgery).
   • Situational type (e.g., fear of lifts or flying).
   • Other type (e.g., fear of choking or vomiting, not fitting other categories).

2. Agoraphobia - This involves fear of open areas, public transport, confined spaces, queues, crowds, or leaving home, often linked to concerns about being unable to escape during a panic.

3. Social anxiety disorder - Previously termed social phobia, this is the fear of social interactions like public speaking or eating in front of others, driven by worries about judgement or humiliation.

Clinical characteristics of phobias

• Cognitive symptoms - Irrational convictions about the phobic stimulus and impaired focus due to persistent anxious thoughts.
• Behavioural symptoms - Avoidance of triggering situations, changes in routines to evade the fear, or attempts to flee when confronted.
• Physical symptoms - Activation of the fight-or-flight response, including adrenaline surges, elevated heart rate, breathing changes, and muscle tightness.
• Emotional symptoms - Overwhelming anxiety and a sense of impending doom.

Diagnostic criteria for phobias

To meet diagnostic standards, the following must apply:

1. A marked and persistent fear enduring over six months.
2. Immediate anxiety upon exposure to the stimulus.
3. Fear disproportionate to the real threat.
4. Active avoidance of the stimulus.
5. Significant interference with daily life, relationships, or work.

Features and diagnostic criteria of obsessive-compulsive disorder (OCD)

Obsessive-compulsive disorder (OCD) combines cognitive obsessions with behavioural compulsions that are interconnected, affecting around 2% of people worldwide. It typically emerges in late adolescence or early adulthood and impacts men and women equally across ethnic groups.

Key components of OCD

• Obsessions - These are the internal, cognitive elements, involving unwanted, recurring thoughts, images, or urges that cause significant distress. Individuals attempt to suppress them but fail, and they are not due to substances.
• Compulsions - These are the external, behavioural responses, consisting of repetitive physical or mental actions aimed at alleviating obsession-related anxiety. Examples include excessive checking (e.g., ensuring locks are secure) or mental rituals like repeating phrases. Relief is short-lived, as obsessions soon return, and compulsions are excessive and unrelated to substances.

Common behaviours in OCD

1. Checking - Repeatedly verifying items like switches or locks.
2. Contamination - Excessive fear of dirt or germs, leading to avoidance of places like public toilets.
3. Hoarding - Accumulating seemingly worthless items, such as outdated newspapers.
4. Symmetry and orderliness - Insisting on precise arrangements, like aligning books by size.

Diagnostic criteria for OCD

A diagnosis requires that obsessions and compulsions consume at least one hour daily or substantially disrupt normal activities, relationships, or functioning. The symptoms must be persistent and not attributable to other causes.