Brain and spinal cord MRI in motor neuron disease

Area of Science:

• Neurology
• Radiology
• Neuroimaging

Background:

• Motor neuron disease (MND) involves progressive degeneration of motor neurons in the brain and spinal cord.
• Current diagnostic methods may not always capture the full extent of neurodegeneration.
• Neuroimaging offers potential for identifying characteristic pathological changes.

Purpose of the Study:

• To investigate the utility of Magnetic Resonance Imaging (MRI) in detecting abnormalities associated with motor neuron disease.
• To compare MRI findings in patients with MND against healthy controls.

Main Methods:

• Brain and spinal cord MRI scans were acquired from 11 patients diagnosed with motor neuron disease.
• MRI data from 17 healthy individuals were used as controls.
• T2-weighted spin echo (SE) or fast spin echo (FSE), and T2* weighted imaging sequences were utilized.

Main Results:

• Symmetric high signal intensity in corticospinal tracts was observed in 9/11 patients on brain MRI and 8/11 on spinal cord MRI.
• High signal in the posterior internal capsule was noted in 4 controls, indicating it's not exclusively pathological for MND.
• No spinal cord abnormalities were detected in controls, whereas low signal in the motor cortex was seen in 10/11 patients and 6/17 controls.

Conclusions:

• MRI frequently demonstrates specific abnormalities within the corticospinal tracts in individuals with motor neuron disease.
• These characteristic MRI findings support its consideration in the diagnostic workup of suspected motor neuron disease cases.
• Distinguishing MND-specific MRI changes from those seen in controls, particularly in the internal capsule, is crucial.