The motor division of CN 7 supplies the muscles of facial expression. Start from the top and work down. Have the patient wrinkle forehead (frontalis muscle), close eyes tight (orbicularis oculi) show their teeth (buccinator), and purse lips or blow a kiss (orbicularis oris). If there is weakness especially in a bilateral upper motor neuron distribution, get the patient to smile by telling a joke or funny story. With a pseudobulbar palsy automatic or emotional facial expression will be more complete than movements to command.The motor division of CN 7 supplies the muscles of facial expression. Start from the top and work down. Have the patient wrinkle forehead (f...all »The motor division of CN 7 supplies the muscles of facial expression. Start from the top and work down. Have the patient wrinkle forehead (frontalis muscle), close eyes tight (orbicularis oculi) show their teeth (buccinator), and purse lips or blow a kiss (orbicularis oris). If there is weakness especially in a bilateral upper motor neuron distribution, get the patient to smile by telling a joke or funny story. With a pseudobulbar palsy automatic or emotional facial expression will be more complete than movements to command.«
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