Lower Motor Neuron Lesion
Clinical Presentation and Symptoms
Lower motor neuron lesion affects voluntary muscle control, leading to weakness, flaccid paralysis, and reflex abnormalities. Diagnosis involves neuroimaging and EMG tests.
Lower Motor Neuron Lesion: Clinical Presentation and Symptoms
The lower motor neuron (LMN) lesion affects the motor function due to damage in the anterior horn cells, peripheral nerves, or neuromuscular junctions. Understanding its clinical presentation is crucial for accurate diagnosis and management.
Causes and Pathophysiology
Lower motor neuron lesions can result from various causes including:
- Poliomyelitis
- Peripheral nerve injury
- Guillain-Barré Syndrome
- Diabetic neuropathy
Clinical Features
Motor Symptoms
- Muscle weakness
- Hypotonia (decreased muscle tone)
- Flaccid paralysis
Reflexes
- Reduced or absent deep tendon reflexes
- Babinski sign is absent
Sensory Symptoms
- Paresthesia in affected limbs
- Reduced proprioception
Diagnosis and Management
Diagnosis involves neurological examination, electromyography (EMG), and nerve conduction studies. Management depends on the underlying cause, with treatments including physiotherapy, medications, and in some cases, surgical interventions.
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