Motor Innervation of The Head & Neck « Back Motor Innervation of The Head & Neck Mind Map Temporal Branch Zygomatic Branch Buccal Branch Marginal Mandibular and Cervical Branches Motor Innervation Head & Neck Quiz 1 / 16 What is the function of the platysma muscle, innervated by the cervical branch? Tenses the neck skin Elevates the upper lip Depresses the corners of the mouth Raises the eyebrows 2 / 16 Which procedure carries a high risk of injuring the marginal mandibular branch? Brow lift Submentoplasty Facelift surgery Rhinoplasty 3 / 16 What is a common sign of injury to the marginal mandibular branch of the facial nerve? Inability to raise the eyebrows Asymmetric smile when smiling but not at rest Drooling from decreased lip sealing ability Inability to close the eyes 4 / 16 Which muscle is responsible for lowering the corners of the mouth and is innervated by the marginal mandibular branch? Mentalis Depressor anguli oris Orbicularis oris Zygomaticus major 5 / 16 Injury to the buccal branch of the facial nerve may result in which symptom? Inability to wrinkle the forehead Loss of sensation in the upper lip Uneven facial expression at rest and with smiling Inability to close the eyes 6 / 16 Which muscle is required for clear speech and is innervated by the buccal branch? Levator labii superioris Zygomaticus major Buccinator Orbicularis oris 7 / 16 What is the primary function of the buccinator muscle? Causes smiling Retracts the mouth angle Flattens the cheek against teeth Elevates the upper lip 8 / 16 Which muscle is responsible for creating horizontal glabellar lines? Zygomaticus major Nasalis Procerus Levator labii superioris 9 / 16 Injury to the zygomatic branch of the facial nerve may result in what inability? Inability to elevate the upper lip Inability to close the eyes Inability to wrinkle the nose All of the above 10 / 16 What is the function of the zygomaticus major and minor muscles? Elevating and everting the upper lip Flaring the nostrils Elevating and retracting the mouth angle (smiling) Pulling the eyebrows down 11 / 16 Which muscle is responsible for tight closure of the eyelids and blinking? Zygomaticus major Corrugator supercilii Upper orbicularis oculi Frontalis 12 / 16 The corrugator supercilii muscle is primarily involved in what facial expression? Winking Scowling Smiling Laughing 13 / 16 What muscle is responsible for creating horizontal forehead wrinkles? Corrugator supercilii Masseter Frontalis Orbicularis oculi 14 / 16 Injury to the temporal branch of the facial nerve can result in which condition? Eyebrow ptosis Loss of lip sensation Jaw misalignment Inability to smile 15 / 16 What is the primary function of the frontalis muscle? Lip movement Jaw movement Eyelid closure Eyebrow elevation 16 / 16 Which branch of the facial nerve is responsible for innervating the frontalis muscle? Cervical branch Temporal branch Zygomatic branch Buccal branch Your score is 0% Restart quiz
