Focal Seizures

Focal seizures, also known as partial seizures, originate in a specific area of the brain. Unlike generalized seizures, which involve both sides of the brain, focal seizures may affect only one region, leading to localized symptoms.

These seizures may occur in people with epilepsy or as a result of other neurological conditions. Depending on the area of the brain involved, they can impact movement, sensations, emotions or awareness. In some cases, focal seizures can spread and evolve into more widespread seizure activity, similar to generalized seizures.

Focal seizures are generally classified based on awareness:

• Focal aware seizures: The person remains conscious and aware during the event but may experience unusual sensations, movements or emotions.
• Focal impaired awareness seizures: Awareness is reduced or altered, and the person may appear confused, unresponsive or perform repetitive movements.

Symptoms of focal seizures can vary depending on the part of the brain affected. Common signs include:

• Sudden changes in sensation, such as tingling or numbness
• Unusual smells, tastes or visual disturbances
• Involuntary jerking or twitching of a body part
• Changes in emotions, such as fear or déjà vu
• Confusion or difficulty responding
• Repetitive movements like lip-smacking or hand rubbing

Because symptoms can be subtle, focal seizures are sometimes mistaken for other conditions.

Focal seizures occur when abnormal electrical activity develops in a specific area of the brain. Possible causes include:

• Brain injury or trauma
• Brain tumors or structural abnormalities
• Stroke or reduced blood flow to the brain
• Infections affecting the brain
• Genetic conditions

Risk factors may include a history of epilepsy, neurological disorders or prior brain injury.

Diagnosing focal seizures involves a detailed medical history, neurological exam and advanced testing. Common diagnostic tools include:

• Electroencephalogram (EEG) to measure brain activity
• Brain imaging such as MRI or CT scans to identify structural changes
• Video monitoring to capture seizure activity and correlate symptoms

Accurate diagnosis helps determine the type of seizure and guides treatment planning.

Treatment for focal seizures focuses on controlling seizures and addressing the underlying cause when possible. Options may include:

• Antiseizure medications to reduce or prevent episodes
• Lifestyle modifications, such as improving sleep and managing stress
• Neuromodulation therapies, such as vagus nerve stimulation (VNS) or responsive neurostimulation (RNS)
• Surgery in select cases where seizures originate from a specific, treatable brain area

Care is tailored to each patient, especially for those with drug-resistant epilepsy.

If not well controlled, focal seizures can lead to complications such as:

• Injury during a seizure episode
• Progression to more widespread seizures
• Difficulty with memory or concentration
• Reduced quality of life

Prompt diagnosis and effective treatment can help reduce these risks.

While not all focal seizures can be prevented, certain steps may help reduce the likelihood of episodes:

• Taking medications as prescribed
• Avoiding known seizure triggers, such as sleep deprivation or alcohol
• Managing underlying health conditions
• Following up regularly with your neurologist

If you or a loved one experiences symptoms of focal seizures, seeking medical evaluation is an important first step. Early diagnosis and treatment can improve outcomes and help prevent complications.

To schedule a visit with a Baptist Health Brain & Spine Care provider, fill out an appointment request form or call 833-596-3876.