Facial Reanimation — MCQs
Which of the following statements regarding traumatic facial nerve palsy is false?
Which surgery is indicated for ptosis in Horner's syndrome?
Fasanella-Servat operation is done for:
Facial paralysis is tested by:
All of the following are true regarding Bell's palsy except:
Iatrogenic traumatic facial nerve palsy is MOST commonly produced during which of the following surgical procedures?
A patient presents with the complaint of inability to close the eye, drooling of saliva, and deviation of the angle of the mouth. Which of the following nerves is most likely to be affected?
Treatment of choice in traumatic facial nerve injury with delayed onset or incomplete paralysis is -
Torrential bleed during tonsillectomy is due to
Which of the following arteries is a branch of the facial artery?
Facial Reanimation Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following statements regarding traumatic facial nerve palsy is false?
- A. Posttraumatic facial nerve palsy may be complete at the time of presentation
- B. Decompression of the canal can be useful treatment
- C. Usually occurs with longitudinal petrous temporal bone fracture (Correct Answer)
- D. Usually occurs with transverse petrous temporal bone fracture
Explanation: ***Usually occurs with longitudinal petrous temporal bone fracture*** ✓ FALSE - This is the correct answer - **Longitudinal temporal bone fractures** account for the majority (70-80%) of temporal bone fractures but are **less likely to cause severe facial nerve palsy** (10-20% incidence) compared to transverse fractures. - When facial nerve injury does occur with a longitudinal fracture, it typically involves the **tympanic segment** and can be caused by **edema or contusion**, often presenting with delayed or incomplete palsy rather than direct transection. *Usually occurs with transverse petrous temporal bone fracture* - **Transverse temporal bone fractures** are less common (20-30%) but are associated with a **higher incidence and severity of immediate facial nerve paralysis** (30-50% incidence) due to direct nerve transection or severe compression. - These fractures typically cross the **internal auditory canal** and otic capsule, often damaging the labyrinth and facial nerve directly. *Posttraumatic facial nerve palsy may be complete at the time of presentation* - **Complete facial nerve paralysis** can occur immediately after trauma, particularly with **transverse temporal bone fractures**, indicating severe injury such as nerve transection. - Early assessment of the degree of paralysis using the House-Brackmann grading system is crucial for determining prognosis and guiding management strategies. *Decompression of the canal can be useful treatment* - **Surgical decompression of the facial nerve canal** may be considered for patients with **immediate complete paralysis** or **progressive paralysis** following trauma, especially if imaging shows nerve entrapment or significant edema. - The decision for surgery is usually guided by **electrophysiological studies** (electroneuronography showing >90% degeneration) and high-resolution CT imaging to assess the extent of nerve damage and fracture pattern.
Question 2: Which surgery is indicated for ptosis in Horner's syndrome?
- A. Blaskovics operation
- B. Frontalis sling
- C. Levator resection
- D. Fasanella-Servat (Correct Answer)
Explanation: ***Fasanella - servat*** - This procedure involves resecting the **tarsus**, **Müller's muscle**, and conjunctiva, effectively shortening the posterior lamella of the eyelid. - It is particularly useful for **mild ptosis** with good levator function, often seen in cases secondary to sympathetic denervation like **Horner's syndrome**. *Blaskovics operation* - This is a more complex external approach that involves the resection of the **levator aponeurosis** and Müller's muscle, which is generally reserved for more severe ptosis. - It is typically indicated for patients with **poor levator function** or significant ptosis that cannot be corrected by less invasive methods. *Frontalis sling* - This procedure is used for severe ptosis with **very poor or absent levator function**, often seen in congenital ptosis or oculomotor nerve palsy. - It involves using a sling material to connect the eyelid to the **frontalis muscle**, allowing the eyebrow to lift the eyelid. *Levator resection* - This operation is performed when there is moderate to severe ptosis with **some levator function** present. - It involves shortening the **levator palpebrae superioris muscle** to elevate the eyelid margin.
Question 3: Fasanella-Servat operation is done for:
- A. Myasthenia gravis
- B. Congenital ptosis (Correct Answer)
- C. Drug induced ptosis
- D. Horner syndrome
Explanation: ***Congenital ptosis*** - The **Fasanella-Servat operation** is indicated for **mild to moderate ptosis with good levator function** (levator function >10mm). - This includes cases of **mild congenital ptosis** where the levator muscle has adequate function. - The procedure involves resecting a portion of the **conjunctiva, Müller's muscle, and upper tarsus** to elevate the eyelid. - It provides approximately **2-3mm of lid elevation** and is particularly useful when levator function is preserved. *Horner syndrome* - Horner syndrome causes ptosis due to **denervation of Müller's muscle** (sympathetic dysfunction). - The Fasanella-Servat operation **resects Müller's muscle**, which would be counterproductive when this muscle is already dysfunctional. - Ptosis in Horner syndrome is typically managed with **levator resection** or observation, not Fasanella-Servat. *Myasthenia gravis* - Ocular manifestations of **myasthenia gravis** are treated with **acetylcholinesterase inhibitors** and immunomodulatory therapies. - The underlying **neuromuscular junction defect** causes variable ptosis that fluctuates throughout the day. - Surgical correction is not appropriate as the condition requires medical management of the autoimmune process. *Drug induced ptosis* - **Drug-induced ptosis** is a reversible condition that resolves with **discontinuation of the offending medication**. - Common culprits include topical prostaglandin analogs and certain systemic medications. - Surgical intervention like the Fasanella-Servat operation is not indicated as the cause is reversible.
Question 4: Facial paralysis is tested by:
- A. Whistling (Correct Answer)
- B. Chewing
- C. Protruding the tongue
- D. Swallowing
Explanation: Facial paralysis is tested by: ***Whistling*** - Whistling requires the coordinated action of several facial muscles, including the **orbicularis oris** and **buccinator**, which are innervated by the **facial nerve (cranial nerve VII)** [1]. - Inability to whistle or an asymmetrical attempt strongly suggests a deficit in **facial nerve function**, indicative of facial paralysis [1]. *Chewing* - Chewing is primarily controlled by the **muscles of mastication**, such as the masseter and temporalis, which are innervated by the **trigeminal nerve (cranial nerve V)**, not the facial nerve. - While facial muscles play a minor role in holding food, their primary involvement in chewing is limited compared to the trigeminal nerve. *Protruding the tongue* - Protruding the tongue is governed by the **hypoglossal nerve (cranial nerve XII)**, which innervates the intrinsic and extrinsic muscles of the tongue [1]. - This action does not test the function of the facial nerve. *Swallowing* - Swallowing (deglutition) is a complex process involving multiple cranial nerves, including the **trigeminal (V)**, **facial (VII)**, **glossopharyngeal (IX)**, **vagus (X)**, and **hypoglossal (XII)** nerves. - While the facial nerve assists in lip closure and maintaining oral pressure, it's not the primary nerve tested for this function, and difficulties here are often more indicative of issues with nerves IX, X, or XII.
Question 5: All of the following are true regarding Bell's palsy except:
- A. Unilateral facial weakness
- B. Steroids are the treatment of choice
- C. Immediate nerve decompression is required (Correct Answer)
- D. Herpes simplex virus is commonly implicated
Explanation: ***Immediate nerve decompression is required*** - **Bell's palsy** is typically managed with medical therapy, primarily **steroids**, to reduce inflammation and promote recovery. - **Surgical decompression** of the facial nerve is rarely indicated and is not a standard or immediate treatment. *Unilateral facial weakness* - This is the **hallmark symptom** of Bell's palsy, affecting one side of the face. - Patients experience difficulty with facial expressions, eye closure, and oral competence [1]. *Steroids are the treatment of choice* - **Corticosteroids**, such as prednisone, are the primary treatment to reduce inflammation of the **facial nerve (cranial nerve VII)** [1]. - Early initiation of steroids significantly improves the chances of full recovery [1]. *Herpes simplex virus is commonly implicated* - **Reactivation of HSV-1** is thought to be a major underlying cause, leading to inflammation and swelling of the facial nerve. - Other viruses, such as **varicella-zoster virus (VZV)**, can also cause facial paralysis (Ramsay Hunt syndrome), which is clinically distinct.
Question 6: Iatrogenic traumatic facial nerve palsy is MOST commonly produced during which of the following surgical procedures?
- A. Ossiculoplasty
- B. Myringoplasty
- C. Mastoidectomy (Correct Answer)
- D. Stapedectomy
Explanation: ***Mastoidectomy*** - **Mastoidectomy** involves extensive bone removal around the **facial nerve's mastoid segment**, making it the most vulnerable during this procedure due to its complex anatomical course. - The surgery's depth and proximity to the fallopian canal increase the risk of accidental nerve injury from drilling or instrumentation. *Ossiculoplasty* - **Ossiculoplasty** primarily involves repairing or replacing the **ossicles** in the middle ear, generally not requiring manipulation close to the facial nerve. - While the nerve is in the vicinity, direct trauma is rare compared to extensive bone work. *Myringoplasty* - **Myringoplasty** is a relatively superficial procedure involving the repair of the **tympanic membrane**, far from the main course of the facial nerve. - The surgical field is typically limited to the external auditory canal and middle ear cavity, posing minimal risk to the nerve. *Stapedectomy* - **Stapedectomy** involves operating on the **stapes bone** in the oval window, which is near the horizontal segment of the facial nerve, but less frequently injured compared to mastoid surgery. - Although the nerve is identified and protected, the extent of bone removal and proximity is less than in a full mastoidectomy.
Question 7: A patient presents with the complaint of inability to close the eye, drooling of saliva, and deviation of the angle of the mouth. Which of the following nerves is most likely to be affected?
- A. Facial nerve (Correct Answer)
- B. Trigeminal nerve
- C. Oculomotor nerve
- D. Glossopharyngeal nerve
Explanation: ***Facial nerve*** - The **facial nerve (cranial nerve VII)** controls the muscles of facial expression, including those for eye closure and mouth movement. - Damage to the facial nerve leads to **unilateral facial weakness or paralysis**, causing inability to close the eye, drooling from the corner of the mouth, and deviation of the mouth. *Trigeminal nerve* - The **trigeminal nerve (cranial nerve V)** is primarily responsible for **facial sensation** and **mastication (chewing)**. - Dysfunction typically presents as facial numbness, pain, or difficulty chewing, not facial muscle paralysis. *Oculomotor nerve* - The **oculomotor nerve (cranial nerve III)** controls most **extraocular muscles** (eye movements), pupillary constriction, and lifts the eyelid. - Damage would result in ptosis (drooping eyelid), dilated pupil, and outward and downward deviation of the eye. *Glossopharyngeal nerve* - The **glossopharyngeal nerve (cranial nerve IX)** is involved in **taste from the posterior tongue**, **swallowing**, and sensation from the pharynx. - Its impairment can lead to difficulty swallowing, loss of gag reflex, or altered taste, but not facial paralysis.
Question 8: Treatment of choice in traumatic facial nerve injury with delayed onset or incomplete paralysis is -
- A. Facial decompression
- B. Masterly inactivity (Correct Answer)
- C. Facial sling
- D. Systemic corticosteroid
Explanation: ***Masterly inactivity*** - In traumatic facial nerve injuries with **delayed onset or incomplete paralysis**, the prognosis for **spontaneous recovery** is excellent (up to 90%). - This approach involves careful observation with serial clinical examinations, allowing time for nerve recovery without the risks of surgical intervention. - **Surgical exploration** is reserved for immediate complete paralysis or when electrodiagnostic tests (electromyography, electroneuronography) show >90% degeneration. *Facial decompression* - This surgical procedure is considered only in cases of **immediate complete paralysis** with temporal bone fractures and confirmed severe nerve degeneration on testing. - It is **not indicated** for delayed-onset or incomplete injuries, as these have excellent spontaneous recovery rates. - Carries risks of further nerve damage, CSF leak, and hearing loss. *Facial sling* - A facial sling is a **late reconstructive procedure** used for permanent facial paralysis when nerve recovery has failed after 1-2 years. - It is a palliative measure to improve facial symmetry and eye protection, not a treatment for acute nerve injury. *Systemic corticosteroid* - While corticosteroids have a role in **Bell's palsy** (idiopathic facial paralysis), their benefit in **traumatic facial nerve injury is unproven**. - The primary pathology in trauma is mechanical disruption, not inflammatory edema that would respond to steroids. - Some clinicians use steroids empirically, but evidence does not support this as standard treatment.
Question 9: Torrential bleed during tonsillectomy is due to
- A. Tonsillar artery (Correct Answer)
- B. Paratonsillar vein
- C. Facial artery
- D. None of the options
Explanation: ***Tonsillar artery*** - The **tonsillar artery**, a branch of the facial artery, is the primary arterial supply to the tonsils and is a common source of **significant hemorrhage** during tonsillectomy due to its direct blood flow. - Its deep location and proximity to the surgical field make it vulnerable to injury, leading to **torrential bleeding** if not adequately ligated or cauterized. *Paratonsillar vein* - While **paratonsillar veins** can bleed during tonsillectomy, their venous nature means the bleeding is typically less rapid and severe compared to arterial bleeding. - Venous bleeding is usually more readily controlled through pressure or less aggressive hemostatic measures than arterial bleeding. *Facial artery* - The **facial artery** is the *parent artery* that gives rise to the tonsillar artery; direct injury to the main facial artery during tonsillectomy is less common. - However, if the main facial artery were injured, it would indeed cause significant bleeding, but the tonsillar artery itself is the more direct and frequent cause of torrential bleeding. *None of the options* - This option is incorrect because the **tonsillar artery** is a well-established cause of significant, even torrential, bleeding during tonsillectomy. - The other options describe structures that can bleed, but the tonsillar artery is the most direct and common cause of massive hemorrhage from within the tonsillar bed.
Question 10: Which of the following arteries is a branch of the facial artery?
- A. Infraorbital, dorsal nasal, deep facial, mental
- B. Ascending palatine, superficial temporal, submental, inferior labial
- C. Superior thyroid, lingual, facial, maxillary
- D. Inferior labial, superior labial, lateral nasal, angular (Correct Answer)
Explanation: ***Inferior labial, superior labial, lateral nasal, angular*** - The **facial artery** is a major branch of the **external carotid artery** that supplies the face. - Its key branches include the **inferior labial**, **superior labial**, **lateral nasal**, and **angular arteries**, which contribute to the blood supply of the lips, nose, and medial canthus of the eye. *Ascending palatine, superficial temporal, submental, inferior labial* - The **superficial temporal artery** is a terminal branch of the **external carotid artery**, not the facial artery. - While the **ascending palatine** and **submental arteries** are branches of the facial artery, including the superficial temporal artery makes this option incorrect. *Infraorbital, dorsal nasal, deep facial, mental* - The **infraorbital artery** and **mental artery** are branches of the **maxillary artery**, which is another branch of the external carotid artery, not the facial artery. - The **dorsal nasal artery** is typically a terminal branch of the **ophthalmic artery**, which arises from the internal carotid artery. *Superior thyroid, lingual, facial, maxillary* - These are all **major branches of the external carotid artery** itself, not branches of the facial artery. - The question specifically asks for branches *of* the facial artery.
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