Facial nerve palsy due to birth trauma

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Central nervous system

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Facial nerve palsy due to birth trauma

These may be observed in the newborn infant:

• Present immediately after birth
• Failure of the lower lip to pull down symmetrically while crying (typical)
• Failure of any movement on the affected side of the face (total involvement, unusual)
• Eyelid may not close on affected side
• Lower face (below eyes) appears asymmetrical while crying

Physical examination is usually sufficient to diagnose this condition. Rarely, a nerve conduction study with electromyogram (NCS/EMG) is needed. The NCS/EMG tests the electrical function of the nerve and can pinpoint where the nerve was injured.

Brain imaging techniques are deemed not necessary, unless a brain problem is suspected instead of a facial nerve injury.

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