Facial nerve palsy due to birth trauma is the loss of controllable (voluntary) muscle movement in an infant's face due to pressure on the facial nerves just before or at the time of delivery.
Alternative NamesSeventh cranial nerve palsy due to birth trauma
Causes, incidence, and risk factorsThe infant's facial nerve (also called the seventh cranial nerve) can be damaged just before or at the time of delivery.
Most of the time the cause is unknown. However, a difficult delivery, with or without the use of instruments called forceps, may lead to this condition.
Some factors that can cause birth trauma (injury) include:
However, most of the time these factors do not lead to facial nerve palsy or birth trauma.
SymptomsThe most common form of facial nerve palsy due to birth trauma involves only the lower part of the facial nerve. This area controls the muscles around the lips. The defect is seen mainly when the infant cries.
The newborn infant may have the following symptoms:
A physical exam is usually all that's needed to diagnose this condition. Rarely, a nerve conduction study is needed. Such a test can pinpoint the exact location of the nerve injury.
Brain imaging tests are not needed unless the health care provider suspects another problem (such as a stroke).
TreatmentIn most cases, the infant will be closely monitored to see if the paralysis goes away on its own.
Infants with permanent paralysis need special therapy.
Expectations (prognosis)The condition usually goes away on its own.
ComplicationsOccasionally the facial muscles on the affected side become permanently paralyzed.
Calling your health care providerThe health care provider will usually diagnose this condition while the infant is in the hospital. However, mild cases involving just the lower lip may not be seen at birth. A parent, grandparent, or other person may notice the problem later.
If the movement of your infant's mouth looks different on each side when he or she cries, you may want to call your health care provider.
PreventionThere is no way to prevent pressure injuries in the unborn child. The proper use of forceps and improved childbirth methods have reduced the rate of facial nerve palsy.
Facial nerve palsy due to birth trauma is the loss of controllable (voluntary) muscle movement in an infant's face due to pressure on the facial nerve just before or at the time of delivery.
Alternative NamesSeventh cranial nerve palsy due to birth trauma
Causes, incidence, and risk factorsThe infant's facial nerve (also called the seventh cranial nerve) can be damaged just before or at the time of delivery.
Most of the time the cause is unknown. However, a difficult delivery, with or without the use of instruments called forceps, may lead to this condition.
Some factors that can cause birth trauma (injury) include:
However, most of the time these factors do not lead to facial nerve palsy or birth trauma.
SymptomsThe most common form of facial nerve palsy due to birth trauma involves only the lower part of the facial nerve. This part controls the muscles around the lips. The muscle weakness is mainly noticeable when the infant cries.
The newborn infant may have the following symptoms:
A physical exam is usually all that is needed to diagnose this condition. Rarely, a nerve conduction study is needed. Such a test can pinpoint the exact location of the nerve injury.
Brain imaging tests are not needed unless the health care provider suspects another problem (such as a tumor or stroke).
TreatmentIn most cases, the infant will be closely monitored to see if the paralysis goes away on its own.
Infants with permanent paralysis need special therapy.
Expectations (prognosis)The condition usually goes away on its own.
ComplicationsOccasionally the facial muscles on the affected side become permanently paralyzed.
Calling your health care providerThe health care provider will usually diagnose this condition while the infant is in the hospital. However, mild cases involving just the lower lip may not be noticed at birth. A parent, grandparent, or other person may notice the problem later.
If the movement of your infant's mouth looks different on each side when he or she cries, you should make an appointment with your child's health care provider.
PreventionThere is no guaranteed way to prevent pressure injuries in the unborn child. The proper use of forceps and improved childbirth methods have reduced the rate of facial nerve palsy.
ReferencesAdams-Chapman I, Stoll BJ. Nervous system disorders. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 18th ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 99.
Reviewed ByReview Date: 07/10/2010
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Luc Jasmin, MD, PhD, Department of Neurosurgery, Cedars Sinai Medical Center, Los Angeles, and Department of Anatomy, University of California, San Francisco, CA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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