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Somatic & Functional Neurological Disorder (FND)
Expert Psychiatric Assessment
Specialist evaluation of medically unexplained symptoms in legal proceedings. Our expert psychiatrists provide comprehensive FND psychiatric expert reports, distinguishing between genuine functional symptoms and malingering in complex personal injury and clinical negligence claims.
Understanding Somatic Symptom Disorder & FND
What is Functional Neurological Disorder (FND)?
Functional Neurological Disorder (FND), previously referred to as conversion disorder, is a psychiatric condition where patients experience physical neurological symptoms—such as weakness, tremors, or seizures—that are not explained by a traditional organic neurological disease. Under DSM-5 (300.11) and ICD-11 (6C40), FND is understood as a problem with how the brain sends and receives signals, rather than structural damage.
Somatic Symptom Disorder (SSD) involves an extreme focus on physical symptoms—such as pain or fatigue—that causes major emotional distress and problems functioning. A somatic symptom disorder assessment is often required in civil litigation when a claimant’s physical disability appears disproportionate to the initial physical injury.
Key Clinical Presentations
FND and somatic symptoms can manifest in diverse ways, often mimicking serious neurological conditions. Expert evaluation is essential to identify the “internal inconsistency” required for a positive diagnosis:
Motor Dysfunction
- Functional limb weakness or paralysis
- Functional tremors or dystonia
- Gait abnormalities (e.g., “astasia-abasia”)
- Functional speech disturbances (aphonia)
- Inconsistency on clinical examination (e.g., Hoover’s sign)
Sensory & Paroxysmal Symptoms
- Dissociative (non-epileptic) seizures
- Functional visual loss or double vision
- Functional numbness or tingling (paresthesia)
- Global sensory loss not following dermatomes
- Functional hearing loss or tinnitus
Cognitive & Somatic Focus
- “Brain fog” or functional memory loss
- Persistent medically unexplained symptoms
- High levels of health-related anxiety
- Excessive time and energy devoted to symptoms
- Significant functional impairment in daily life
Psychological Characteristics
- History of childhood or adult trauma
- Comorbid depression or anxiety disorders
- Dissociative symptoms (derealisation/depersonalisation)
- Maladaptive illness beliefs
- Reinforcement of illness behaviour
Diagnostic Shift: Modern criteria focus on the presence of positive clinical signs of inconsistency rather than the mere absence of organic disease.
Prevalence and Legal Impact
FND is the second most common reason for a new neurology consultation. In the legal sphere, medically unexplained symptoms often lead to high-value claims. A functional neurological disorder psychological evaluation is critical for the court to understand the psychological drivers of the disability and to determine whether the symptoms were caused by the index event or pre-existing psychological vulnerability.
FND & Somatic Symptoms in Legal Proceedings
Cases involving psychogenic symptoms are among the most challenging for solicitors. Our experts provide clarity on complex issues of causation and secondary gain:
Expert evidence is vital to ensure that genuine FND is not dismissed as “all in the mind,” while also protecting the court against exaggerated claims.
Legal Areas Requiring Somatic & FND Evaluation
Personal Injury
Chronic pain, functional weakness after RTA or workplace injury—causation and prognosis
Clinical Negligence
Harm from misdiagnosis of organic disease vs. functional disorder; treatment errors
Employment Law
Disability status under Equality Act 2010; fitness for work with functional symptoms
Insurance Claims
Income protection and critical illness claims for medically unexplained disability
Criminal Proceedings
Dissociative seizures or amnesia affecting fitness to plead or criminal responsibility
CICA Claims
Psychogenic symptoms following violent crime or historic childhood abuse
Our Somatic & FND Assessment Approach
How We Assess
- Neuro-psychiatric clinical interview (2+ hours)
- Review of extensive medical and therapy records
- Validated tools: PHQ-15, SSS-8, and Dissociative Experiences Scale
- Symptom Validity Testing (SVT) where indicated
- Detailed exploration of the “triggering event” and life stressors
- Collaboration with neurologists for physical sign confirmation
- CPR Part 35 compliant expert witness report
Expert Selection
- Neuropsychiatrist: The gold standard for FND; understands the brain-mind interface
- Consultant Psychiatrist: For Somatic Symptom Disorder and comorbid depression/anxiety
- Clinical Psychologist: For psychometric testing and CBT-based rehabilitation assessment
- Liaison Psychiatrist: Specialist in the overlap between physical and mental health
Why Instruct Our FND Experts?
FND Specialist Panel
Access to leading neuropsychiatrists who specialise in functional neurological disorders.
Rapid CV & Quote Delivery
Tailored expert recommendations and fixed-fee quotes provided within 1 hour.
Court-Ready Reports
Highly detailed reports addressing complex causation and symptom validity for the court.
Symptom Validity Testing
Experts trained in distinguishing functional symptoms from conscious exaggeration.
Nationwide Coverage
Assessments available face-to-face across the UK or via secure remote video link.
Evidence-Based Medicine
Reports based on the latest neurological research and DSM-5/ICD-11 diagnostic criteria.
Frequently Asked Questions
Instruct an FND Expert Witness Today
CVs and quotes in 1 hour. Expert neuropsychiatric reports for complex medically unexplained symptoms. CPR Part 35 compliant.
