Although this condition is painless and rarely fatal, prolonged attacks can have a significant impact on a person’s appearance, daily life, and psychosocial well-being. Many experience discomfort and anxiety during social interactions, and may even experience professional difficulties if they experience frequent attacks. However, early detection and appropriate treatment allow effective management.
Causes of hemifacial spasm
Facial hemispasm is a condition characterized by uncontrollable contractions of the muscles on one side of the face, usually beginning around the eye and then spreading to other muscles such as those of the cheeks, mouth or chin. These spasms can occur at any time, last from a few seconds to a few minutes, and often repeat several times a day.
At first, symptoms may be very mild and go unnoticed. However, over time, the frequency and severity of attacks tend to increase, which has a considerable impact on the patient’s life.
Many people think that hemifacial spasms are a reflex or a habit; However, the most common cause of hemifacial spasms is vascular-neurological impingement, which occurs when a blood vessel near the facial nerve (cranial nerve VII) compresses the nerve at its point of exit from the brainstem.
The facial nerve controls the activity of facial muscles, including closing the eyes, smiling, speaking, and expressing emotions. When compressed for prolonged periods by blood vessels, the myelin sheath – the protective layer that transmits nerve signals – is gradually damaged. This results in a disruption of the transmission of nerve signals, causing uncontrolled facial muscle spasms.
Compression usually occurs in the transition zone between the central and peripheral myelin of the nerve. This area is particularly sensitive and therefore easily affected by blood vessel pressure.
Among the arteries which frequently compress the facial nerve, we can cite: the posteroinferior cerebellar artery and the anteroinferior cerebellar artery.
In addition to the main cause of vascular-neurological conflict, some rare cases may be linked to other causes such as: tumors of the cerebellopontine angle; vascular malformations; brainstem lesions; complications after trauma or neurosurgery.
Prolonged epileptic seizures can affect the patient’s appearance, daily life, and psychosocial well-being.
Therefore, accurate diagnosis of the cause plays a crucial role in choosing the appropriate treatment.
Signs and symptoms of hemifacial spasm
Clinical symptoms are a crucial factor in the diagnosis of hemifacial spasm. Signs usually develop in stages.
Eye twitching – an early sign
Initially, patients often experience mild contractions of the orbicularis oculi muscle, causing continuous blinking. Many people easily confuse these twitches with common blinking due to stress, lack of sleep, or fatigue.
However, unlike physiological nystagmus, pathological nystagmus usually occurs repeatedly over a long period of time, appearing more and more frequently, and does not disappear spontaneously after a period of rest.
The hostage-taking spread to other regions.
As the disease progresses, attacks are no longer limited to the eye area but gradually extend to other muscles on the same side of the face, such as: the cheek muscles; the muscles around the mouth; the chin muscles; the neck muscles.
In some severe cases, an entire side of the face may contract violently, causing temporary facial disfigurement.
I hear a clicking sound in my ear.
A less common, but quite characteristic, symptom is the perception of a “clicking” or slight vibration in the ear. This phenomenon is due to contraction of the stapedius muscle, a small muscle located in the middle ear.
The frequency of seizures increases with stress.
Attacks are often more pronounced when the patient is subjected to psychological stress, anxiety, fatigue or lack of sleep.
Conversely, by relaxing or sleeping, seizures may ease or disappear temporarily.
To accurately determine the cause and severity of the disease, the doctor may prescribe several paraclinical examinations.
This test evaluates the electrical activity of the facial muscles. This method can detect nerve conduction abnormalities, thereby contributing to the diagnosis of hemifacial spasm.
- Magnetic resonance imaging (MRI)
Brain magnetic resonance imaging (MRI), and more particularly specialized MRI of the cerebellopontine angle, makes it possible to detect vascular compression of the facial nerve. This information is crucial for choosing the optimal treatment.
Methods treatment of hemifacial spasm.
Once the diagnosis of hemifacial spasm is established, doctors prescribe specific treatments adapted to each patient. There are two main methods of treating patients: botulinum toxin injections or microvascular decompression surgery. The latter is considered the most radical treatment for hemifacial spasm.
During this procedure, the surgeon will access the facial nerve through a small incision made behind the ear, near the sigmoid sinus. He will then cut the blood vessel that is compressing the nerve and place a small compress between the vessel and the nerve to avoid direct contact.
This method eliminates the root cause of the disease, allowing long-lasting results to be achieved.
Therefore, people experiencing the following signs should consult a neurologist: facial twitching on one side lasting for several weeks; persistent eye twitching that does not improve; contractions extending to the cheek or mouth; or increased frequency of epileptic seizures.
Early diagnosis helps identify the exact cause and choose the appropriate treatment, thereby preventing the disease from progressing to a more serious stage.
In summary: Although not fatal, hemifacial spasm can significantly impair quality of life. Many patients delay seeing a doctor out of embarrassment or because they think it is a simple eye twitch.
If you notice prolonged facial twitching on one side, see a doctor for examination and advice. Early diagnosis allows effective management of symptoms.
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