Foot Drop as a Symptom of Amyotrophic Lateral Sclerosis (ALS)

What is Foot Drop as a Symptom of ALS?

Foot drop is a walking condition that can occur as a symptom of amyotrophic lateral sclerosis (ALS), a progressive neurodegenerative disease also known as Lou Gehrig’s disease.

ALS is a neurodegenerative disorder that affects the nerves responsible for muscle movement. When someone has foot drop, it means that they have weakness or paralysis in the muscles that lift the foot towards the shin.

In ALS, foot drop occurs because the motor neurons, which are the nerve cells that control muscle movement, become damaged and eventually die. This leads to a loss of communication between the brain and the muscles, causing weakness and difficulty in lifting the foot properly while walking.

Why foot drop can be an early sign of ALS:

In ALS, foot drop can occur when motor neurons that control movement in the legs become damaged, leading to muscle weakness and difficulty lifting the front of the foot while walking.
How ALS-related foot drop differs from other causes:

Foot drop can have many causes, but in ALS it results from progressive motor neuron damage rather than injury or compression of a peripheral nerve. ALS affects nerve cells in the brain and spinal cord that control muscle movement which distinguishes it from foot drop caused by localized nerve injuries. Recognizing foot drop as a symptom of ALS can be done by paying attention to early walking and balance changes, including:

• Feeling like one shoe is looser than the other
• Walking with a higher step than usual
• Numbness or weakness in one foot compared to the other
• Unsteady ankles and knees while standing
• Dragging of the foot while walking, leading to an uneven step

While there is no cure for ALS-related foot drop, there are treatments and interventions that can help manage symptoms and improve quality of life. Some recommended actions and treatments for foot drop include:

• Using lightweight leg braces and shoe inserts called ankle-foot orthotics to support the foot and improve walking ability
• Engaging in exercise therapy to strengthen muscles and maintain joint motion, which can help improve gait
• In some cases, using devices that electrically stimulate the peroneal nerve during footfall may be appropriate
• Surgery may be considered for individuals with permanent loss of movement, such as fusing the foot and ankle joint or transferring tendons from stronger leg muscles

It is important to reach out to a doctor or seek medical help if you experience foot drop, as it may be an early sign of ALS or another neurological condition that requires prompt evaluation. If your toes drag on the floor when you walk, consult your healthcare professional. Untreated foot drop can lead to loss of mobility.