Facial Paralysis After Head Traumas
Head injuries, especially fractures in the skull or concussions, can damage the facial nerve (nervus facialis). This can lead to both functional and aesthetic problems. In this context, facial paralysis following head injuries can affect both quality of life and social interaction. To guide you at this point, we have created the content “Facial Paralysis After Head Traumas.” You can find detailed information by reviewing the content. We wish you all good health and happy reading.
Why Does Head Trauma Cause Facial Palsy?
Head trauma can cause facial paralysis, particularly due to damage occurring in the areas where the facial nerve passes. In this context, the facial nerve (nervus facialis) emerges from the brainstem, passes behind the ear, and controls the movement of the facial muscles. Because these controlling facial nerves pass through a very narrow bone canal within the temporal bone, conditions such as fractures, bleeding, edema, or tissue pressure following trauma can cause the nerve to become compressed or damaged. This is because sometimes the nerve can be completely severed or crushed by the surrounding bone structures. In this case, the nerve cannot send electrical signals to the muscles, and the facial muscles lose their ability to move. Traffic accidents, falls from heights, sports injuries, and blows to the head can cause this type of damage. Furthermore, facial paralysis may develop immediately after the trauma, or it may appear several hours or days later as the swelling increases. Depending on the severity of the damage, the paralysis may be temporary or permanent. Therefore, it is vitally important to carefully observe facial movements in individuals who have suffered head trauma in the early stages and, if necessary, to evaluate the nerve structure using imaging methods.
What Sort of Fractures To The Temporal Bone Cause Facial Palsy?
Temporal bone fractures are one of the most common causes of facial paralysis resulting from head trauma. This is because the temporal bone contains a narrow tunnel called the fallopian canal, through which the facial nerve (nervus facialis) passes within the skull. Damage to this tunnel by the bone can directly compress the nerve tissue or sever the nerve fibers. Longitudinal and transverse fracture types are particularly decisive in the development of facial paralysis.
Longitudinal fractures extend parallel to the external auditory canal of the temporal bone and usually cause damage to the middle ear structures; facial paralysis occurs in approximately 10% of these fractures. On the other hand, transverse fractures pass through the inner ear structures and directly affect the fallopian canal, and in this case, the facial nerve can be seriously damaged; the risk of facial paralysis is over 50%. Consequently, regardless of the direction and location of the fracture, pressure on the nerve from bone fragments, bleeding, or increased edema causes impaired nerve conduction. Therefore, facial paralysis following temporal bone fractures is a serious condition requiring urgent neurological evaluation and, in most cases, early surgical intervention.
Symptoms Of Facial Paralysis After Head Trauma
There are certain main symptoms of facial paralysis following head trauma. These symptoms vary from person to person and do not occur with the same severity in everyone. In this context, the symptoms of facial paralysis following head trauma are as follows:
- Facial asymmetry: One side appearing more immobile or droopy than the other
- Inability to close the eyelid: The eye on the affected side does not close completely or remains open
- Drooping of the corner of the mouth: The corner of the mouth droops downward when talking or smiling
- Difficulty speaking and eating: Inability to pronounce words clearly or liquids leaking from the corners of the mouth due to restricted lip movement
- Ear pain or sound sensitivity: Hypersensitivity to sounds (hyperacusis) due to involvement of the auditory branches of the nerve
- Decreased sense of taste: Loss of taste sensation in the front part of the tongue
- Dry or watery eyes: Imbalance in tear production due to inability to close the eyelid
- Inability to move the forehead muscles: Decreased ability to raise the eyebrows or wrinkle the forehead
- Loss of facial expressions in children: Noticeable differences in facial expressions, especially when smiling, crying, or looking surprised
- Symptoms progressing over time: Gradual decrease in facial movements within a few hours or days after the injury
Diagnosis Of Facial Paralysis Following Head Trauma
Facial paralysis following head trauma is diagnosed through clinical evaluation as well as imaging and electrophysiological tests. To do this, the physician first takes the patient's history of trauma and examines the function of the facial muscles in detail, evaluating mimic activities such as raising the eyebrows, closing the eyes, smiling, and lip movements one by one. Next, nerve conduction tests such as electroneurography (ENoG) or electromyography (EMG) may be performed to determine the severity of facial paralysis and which nerve branches are affected. These tests play an important role in predicting the potential for recovery by showing the nerve's conduction capacity and the functional status of the muscles. Additionally, computed tomography (CT) or magnetic resonance imaging (MRI) is used to confirm the diagnosis and visualize the anatomical effects of the trauma; it reveals structural abnormalities such as temporal bone fractures or nerve compressions. In the diagnostic process, both the degree of nerve damage and the type of trauma are considered to determine whether conservative treatment or surgical intervention is required. Early and accurate diagnosis is vital for preserving facial function and accelerating the recovery process.
What Treatments Are Applied in the Early Stage of Facial Paralysis Due to Head Trauma?
Treatment methods for facial paralysis caused by head trauma vary in the early stages. This is because the difference depends on the severity of the head trauma. The specified treatment methods are as follows:
What Treatment Options are Available for Advanced Stages of Facial Paralysis Caused By Head Trauma?
Treatment methods for facial paralysis caused by head trauma also change in the later stages. These treatment methods also vary depending on the severity of the head trauma. The treatment methods mentioned are as follows:
- Microsurgical Nerve Repair: In cases of nerve rupture or severe damage, microsurgical nerve repair is performed to reconnect the nerve fibers. This restores facial muscle function.
- Free Muscle Transfer: In cases of permanent paralysis, free muscle transfer allows facial expressions to be restored by transplanting muscle from another part of the body to the facial muscles.
- Nerve Transfer / Cross Facial Nerve Graft: Grafts taken from healthy nerves are connected to the paralyzed side to support facial muscle function. This procedure is also called a cross facial nerve graft.
- Temporalis Tendon Transfer (MIT-3): By directing the temporalis muscle, one of the chewing muscles, to the mouth and facial muscles, smiling and lip movements are achieved. Therefore, patients who have suffered facial paralysis undergo a temporalis tendon transfer procedure to achieve stability in the patient's lip movements.
- Masseter Muscle Transfer: In masseter muscle transfer, the muscle is directed to support the corner of the mouth movements, thus achieving dynamic facial expressions.
- Botulinum Toxin Applications: Botulinum toxin is applied to reduce asymmetry in paralyzed or healthy muscles and maintain facial symmetry. This gives the face a more proportionate and even appearance.
- Physical Therapy and Facial Exercises: These are applied after surgery to strengthen muscles, maintain symmetry, and maximize function.
- Aesthetic and Reconstructive Procedures: If there is permanent asymmetry or drooping in the face, aesthetic corrections can be made through surgery or minimally invasive methods.
If you are looking for a professional team specializing in facial paralysis following head trauma, you can contact Dr. Berke Özücer and his team immediately.
