Trajectory of Mobility Function Decline for People With Motor Neuron Disease

Area of Science:

• Neurology
• Motor Neuron Disease Research
• Mobility Function Studies

Background:

• Motor neuron disease (MND) leads to progressive functional decline.
• Mobility impairment is a key concern for individuals with MND.
• Factors influencing the rate of mobility loss require further investigation.

Purpose of the Study:

• To explore factors influencing the rate of mobility function decline in people with MND.
• To identify the impact of neck weakness on mobility decline in MND patients.

Main Methods:

• Retrospective, longitudinal observational study.
• Recruited 358 adults with MND from a Statewide Progressive Neurological Disease Service.
• Assessed mobility function (gait, assistance) and presence of neck weakness.

Main Results:

• Median time to loss of independent gait was 30.5 months.
• 141 (39.4%) participants had neck weakness, leading to earlier loss of independent gait and housebound status.
• Amyotrophic lateral sclerosis (ALS) phenotypes showed a more rapid mobility decline compared to flail limb and primary lateral sclerosis (PLS) phenotypes.

Conclusions:

• Neck weakness and specific MND phenotypes (e.g., ALS) significantly impact the trajectory of mobility decline.
• Identifying neck weakness is crucial for predicting faster mobility loss in MND.
• Understanding these factors can guide interventions and support for individuals with MND.