About Functional Neurologic Disorder (Conversion Disorder)
The exact cause of FND is unknown, but there are several potential pathophysiologic causes, including:
- Abnormal brain signaling: FND occurs when the brain is unable to send and receive signals properly, leading to a disconnection in the function of different brain areas and emotional processing.
- Disrupted motor control: FND can affect the normal functioning of the motor system, leading to unplanned movements and symptoms that occur without conscious initiation.
- Cognitive and sensory processing abnormalities: FND can also impact memory, concentration, cognition, and the processing of sensations.
Risk factors for FND include:
- Previous physical or mental trauma: FND can be triggered by previous traumatic experiences, as it may serve as a protective mechanism to avoid remembering or reliving difficult events.
It's essential to consult with a healthcare professional for an accurate diagnosis and personalized advice regarding treatment options for FND.
Functional neurologic disorder (FND) can present with a variety of symptoms, both in the early stages and as the condition progresses or becomes more severe.
Here are the most common early symptoms of FND:
- Weakness: Weakness in the limbs or body, which may be sudden or fluctuate in severity.
- Movement Disorders: Tremors, jerks, and abnormal muscle contractions can occur.
- Sensory Symptoms: Altered sensations such as numbness, tingling, or abnormal perception of touch.
- Cognitive Deficits: Difficulties with memory, attention, concentration, or problem-solving.
- Dissociative Seizures: Also known as non-epileptic seizures, these episodes resemble epileptic seizures but are not caused by abnormal brain activity.
As FND progresses or becomes more severe, additional symptoms may occur, including:
- Pain: Persistent pain, including chronic migraine or other types of pain throughout the body.
- Fatigue: Extreme tiredness and lack of energy.
- Speech Difficulties: Sudden onset of stuttering or trouble speaking.
- Problems with Vision or Hearing: Changes in vision or hearing abilities.
- Gait and Balance Issues: Difficulty with walking, posture, balance, or coordination.
It's important to note that FND symptoms can vary widely among individuals and may change over time. If you experience any of these symptoms, it's essential to consult with a healthcare professional for an accurate diagnosis and appropriate management plan.
To diagnose FND, doctors may perform several examinations, tests, and procedures. Here are the commonly used ones:
- Health Assessment: Doctors will assess your medical and family history to rule out other neurological or medical conditions that may cause similar symptoms.
- Physical Examination: A thorough physical examination is conducted to evaluate your overall health and identify any physical signs of FND.
- Neurological Examination: This examination focuses on assessing the function of your nervous system, including reflexes, muscle strength, coordination, and sensory responses.
- Psychiatric Examination: A psychiatrist or psychologist may evaluate your mental health to identify any psychological factors that may contribute to FND.
- Imaging Scans: Tests such as magnetic resonance imaging (MRI) may be performed to rule out other structural abnormalities in the brain or spinal cord.
- Electromyography (EMG): This test records the electrical activity in your muscles and can help identify movement disorders.
To determine the stage or severity of FND, additional examinations or tests may be recommended, including:
- Video-Nystagmography: This test measures eye movements and can help assess the function of the vestibulo-cerebellar system and brainstem.
- Neuropsychological Assessment: This assessment evaluates cognitive function and neurologic status using behavioral tests to measure developmental disorders, neurodegenerative impairment, or brain damage.
It's important to remember that these examinations, tests, and procedures are used as part of a comprehensive evaluation by healthcare professionals. Each individual's situation may vary, so it's crucial to consult with your doctor for personalized advice.
The goals of treatment for FND are to alleviate symptoms, improve functioning, and enhance quality of life. Here are the recommended treatments and how they work to achieve these goals:
- Medication types
- Medications used to treat anxiety and depression can help manage symptoms associated with FND. These medications work by regulating neurotransmitters in the brain that affect mood and emotions.
- Therapies
- Cognitive and behavioral therapies are the mainstay of FND treatment. These therapies help individuals understand their disorder, cope with past traumas that may trigger symptoms, and modify thought patterns to change emotions, mood, or behavior.
- Psychodynamic therapy helps identify and resolve patterns in thoughts, beliefs, and emotions that may contribute to neurological symptoms.
- Relaxation and mindfulness exercises can reduce stress levels, which can in turn alleviate FND symptoms.
- Hypnosis may be beneficial for inducing relaxation and reducing FND symptoms.
- Therapeutic procedures
- Transcranial magnetic stimulation (TMS) uses magnetic fields to stimulate nerve cells in the brain and is used to treat depression and anxiety.
- Transcutaneous electrical stimulation (TES) applies low-voltage electrical current to activate nerves and can be used to relieve pain.
- Health behavior changes
- Lifestyle changes such as regular exercise, balanced diet, relaxation exercises, and adequate sleep can help reduce stress and anxiety levels, thereby improving FND symptoms.
- Other treatments
- Physical therapy can address muscle weakness or impaired movement by retraining normal movement control.
- Occupational therapy helps improve daily functioning and performance of everyday tasks.
- Speech therapy may be necessary if speaking or swallowing abilities are affected.
- Redirecting attention from abnormal movements through conversation or tapping unaffected limbs can lessen FND symptoms.
It's important to consult with healthcare professionals before starting any medication or treatment. Medication dosing may be affected by many factors. Check with your health care professional about dosing for your individual situation. Other side effects can occur. Check with your health care professional or read the information provided with your medication for additional side effect information.