Motor Neuron Disorders
Motor neuron disorders are a group of neurological conditions that affect the motor neurons — the nerve cells responsible for controlling voluntary muscle movement. When these nerve cells become damaged, communication between the brain, spinal cord and muscles is disrupted, which can lead to progressive muscle weakness and loss of movement.
Conditions within this group can include amyotrophic lateral sclerosis (ALS), primary lateral sclerosis (PLS), progressive muscular atrophy (PMA), progressive bulbar palsy (PBP) and other related motor neuron conditions. These disorders are neurodegenerative and may gradually affect mobility, speech, swallowing and breathing.
Early symptoms can vary from person to person and may include:
- Stumbling or difficulty walking due to leg weakness
- Difficulty gripping or holding objects
- Slurred speech
- Difficulty swallowing
- Muscle cramps
- Muscle twitching
- Weakness in the arms, hands or legs
As a motor neuron disorder progresses, symptoms may become more pronounced and can include:
- Breathing difficulties due to weakness of the respiratory muscles
- Increasing fatigue
- Weight loss or reduced food intake
- Sleep disturbance caused by discomfort or breathing difficulties
- Changes in thinking, behaviour or cognitive function
- Episodes of uncontrollable laughing or crying
- Muscle stiffness, joint discomfort or pain
Diagnosing Motor Neuron Disorders
Motor neuron disorders can sometimes be difficult to diagnose because their early symptoms may resemble those of other neurological, nerve or muscle conditions. A specialist neurological assessment is therefore important.
Following a detailed medical history and neurological examination, Dr Debo Gorai may recommend further investigations to help identify the cause of symptoms and exclude other conditions.
Diagnostic investigations may include:
- Blood tests, including creatine kinase testing
- Nerve Conduction Studies (NCS)
- Electromyography (EMG)
- MRI scans
Nerve conduction studies and EMG testing can be particularly useful in assessing nerve and muscle function and helping distinguish motor neuron disorders from other neuromuscular conditions.
If you or someone you know is experiencing progressive muscle weakness, twitching, difficulty walking, changes in speech or swallowing, or other symptoms that may indicate a motor neuron disorder, Synapse Neurology provides specialist neurological assessment and diagnostic testing.
To arrange a consultation with Dr Debo Gorai, contact Synapse Neurology on (03) 8582 6945.