Audiology and Speech Disorders — MCQs

Audiology and Speech Disorders Indian Medical PG Practice Questions and MCQs

Question 41: Which test is used for diagnosing middle ear deafness?

A. Testing Babinski's reflex
B. Eliciting Hoffmann's reflex
C. Finger-nose test
D. Weber's test (Correct Answer)

Explanation: **Explanation:** **Weber’s test** is a tuning fork test (using a 512 Hz fork) used to differentiate between conductive and sensorineural hearing loss. In **middle ear deafness** (Conductive Hearing Loss), the sound lateralizes to the **poorer ear**. This occurs because the conductive pathology (e.g., otosclerosis, CSOM) creates a "masking effect" where ambient room noise is blocked, making the cochlea of the affected ear more sensitive to bone-conducted sound. **Analysis of Incorrect Options:** * **A & B: Babinski’s and Hoffmann’s reflexes** are clinical signs used in neurology to identify **Upper Motor Neuron (UMN)** lesions. Babinski’s involves the plantar reflex (extensor response), while Hoffmann’s involves flicking the nail of the middle finger to elicit thumb/index flexion. * **C: Finger-nose test** is a clinical test for **cerebellar function**. It assesses dysmetria and coordination; it has no diagnostic value for hearing disorders. **High-Yield Clinical Pearls for NEET-PG:** * **Rinne Test:** In middle ear deafness, Rinne is **Negative** (Bone Conduction > Air Conduction). * **Weber Lateralization:** * To the **affected/worse ear** = Conductive Hearing Loss (CHL). * To the **better/normal ear** = Sensorineural Hearing Loss (SNHL). * **Gelle’s Test:** Used specifically to diagnose **Otosclerosis** (a common cause of middle ear deafness); it is "fixed" (no change in sound) when air pressure in the canal is increased. * **ABC (Absolute Bone Conduction) Test:** Stays normal in middle ear deafness but is reduced in SNHL.

Question 42: Deafness is associated with all of the following conditions except?

A. Cockayne's syndrome
B. Alstrom's syndrome
C. Alport's syndrome
D. Abetalipoproteinaemia (Correct Answer)

Explanation: **Explanation:** The correct answer is **Abetalipoproteinaemia (Bassen-Kornzweig syndrome)**. This is a rare autosomal recessive disorder characterized by a deficiency of microsomal triglyceride transfer protein (MTP), leading to an inability to absorb dietary fats and fat-soluble vitamins (A, D, E, K). Clinically, it presents with malabsorption, acanthocytosis (spur-shaped RBCs), retinitis pigmentosa, and progressive neurological symptoms (ataxia). Notably, it is **not** typically associated with hearing loss. **Analysis of Incorrect Options:** * **Cockayne’s Syndrome:** An autosomal recessive DNA repair disorder characterized by "progeroid" (premature aging) features, microcephaly, dwarfism, and photosensitivity. **Progressive sensorineural hearing loss (SNHL)** is a hallmark feature. * **Alstrom’s Syndrome:** A rare ciliopathy presenting with childhood obesity, Type 2 Diabetes, and dilated cardiomyopathy. It is strongly associated with **progressive SNHL** and cone-rod dystrophy. * **Alport’s Syndrome:** A genetic disorder of Type IV collagen affecting basement membranes. The classic triad includes **progressive SNHL**, hereditary nephritis (hematuria/renal failure), and ocular defects (anterior lenticonus). **Clinical Pearls for NEET-PG:** * **Alport’s Syndrome** is a high-yield "Nephro-ENT" topic; the hearing loss is typically bilateral SNHL, first affecting high frequencies. * **Cockayne’s Syndrome** is often tested alongside other DNA repair defects like Xeroderma Pigmentosum. * **Abetalipoproteinaemia** is primarily a Gastro/Heme/Neuro topic; remember **Acanthocytosis** and **Vitamin E deficiency** as its key associations. * Other syndromes with SNHL to remember: **Waardenburg** (white forelock), **Pendred** (goiter), and **Usher** (retinitis pigmentosa).

Question 43: Which syndrome is associated with deafness?

A. Usher syndrome
B. Waardenburg syndrome
C. Pendred syndrome
D. All of the above (Correct Answer)

Explanation: **Explanation:** The correct answer is **D. All of the above**. This question tests the recognition of syndromic hearing loss, which accounts for approximately 30% of all genetic deafness cases. 1. **Usher Syndrome:** This is the most common cause of combined deafness and blindness. It is characterized by **Sensorineural Hearing Loss (SNHL)** and **Retinitis Pigmentosa** (leading to progressive vision loss). It is inherited in an autosomal recessive pattern. 2. **Waardenburg Syndrome:** This is an autosomal dominant condition. Its hallmark features include SNHL and **pigmentary abnormalities**, such as a white forelock (poliosis), heterochromia iridis (different colored eyes), and dystopia canthorum (lateral displacement of the inner canthi). 3. **Pendred Syndrome:** This is an autosomal recessive disorder and is the most common cause of syndromic SNHL. It is characterized by bilateral SNHL and a **euthyroid goiter**. It is classically associated with a specific radiological finding: **Mondini dysplasia** or an enlarged vestibular aqueduct (EVA). **High-Yield Clinical Pearls for NEET-PG:** * **Jervell and Lange-Nielsen Syndrome:** SNHL associated with a **prolonged QT interval** and sudden cardiac death (Autosomal Recessive). * **Alport Syndrome:** SNHL associated with **progressive renal failure** and ocular anomalies (Lenticonus). * **Treacher Collins Syndrome:** Associated with **Conductive Hearing Loss** due to ossicular malformations and craniofacial anomalies. * **Goldenhar Syndrome:** Associated with hemifacial microsomia and preauricular appendages.

Question 44: All of the following can cause hearing loss except?

A. Measles
B. Mumps
C. Chickenpox (Correct Answer)
D. Rubella

Explanation: **Explanation:** The correct answer is **Chickenpox (Varicella)**. While many viral infections are notorious for causing sensorineural hearing loss (SNHL), Chickenpox is rarely associated with hearing impairment. In contrast, the other three viruses listed are classic causes of congenital or acquired SNHL. * **Why Chickenpox is the exception:** Chickenpox typically presents with a characteristic vesicular rash and fever. While its reactivation (Herpes Zoster Oticus/Ramsay Hunt Syndrome) causes severe SNHL and facial palsy, the primary infection (Chickenpox) itself is not a recognized cause of deafness. * **Measles (Rubeola):** It is a common cause of **bilateral, severe-to-profound SNHL**. The virus causes damage to the hair cells in the Organ of Corti and can also lead to secondary otitis media. * **Mumps:** This is the most common cause of **unilateral sudden SNHL** in children. It typically causes total, permanent deafness in one ear, often without any vestibular symptoms. * **Rubella (German Measles):** Maternal infection during the first trimester leads to **Congenital Rubella Syndrome**. It classically presents with a "cookie-bite" audiogram and is associated with the triad of cataracts, heart defects (PDA), and SNHL. **High-Yield Clinical Pearls for NEET-PG:** * **Mumps:** Most common cause of unilateral SNHL in children. * **Rubella:** Most common viral cause of congenital SNHL. * **CMV (Cytomegalovirus):** The overall most common non-genetic cause of congenital SNHL. * **Ramsay Hunt Syndrome:** Caused by Varicella Zoster Virus (reactivation), presenting with vesicles on the pinna, facial palsy, and SNHL.

Question 45: What is the most common frequency of a tuning fork used in ENT practice?

A. 256 Hz
B. 512 Hz (Correct Answer)
C. 1024 Hz
D. 2048 Hz

Explanation: ### Explanation In ENT clinical practice, the **512 Hz tuning fork** is the gold standard for performing basic hearing tests like the Rinne, Weber, and ABC tests. **Why 512 Hz is the Correct Answer:** 1. **Speech Frequency Range:** This frequency falls squarely within the human speech range (500 Hz to 2000 Hz), making it clinically relevant for assessing functional hearing. 2. **Optimal Decay Time:** It maintains its vibration for a sufficient duration to allow the clinician to move the fork between the mastoid and the ear canal without the sound fading too quickly. 3. **Minimal Tactile Interference:** Lower frequencies (like 128 Hz or 256 Hz) produce significant vibrations that the patient can "feel" (tactile sensation) rather than "hear," leading to false-positive results in Bone Conduction testing. **Analysis of Incorrect Options:** * **256 Hz (Option A):** While sometimes used, it often produces a vibratory sensation (pseudo-auditory) that can confuse patients, especially in cases of severe conductive hearing loss. * **1024 Hz & 2048 Hz (Options C & D):** These higher frequencies have a very short decay time (the sound fades too fast) and are difficult for the human ear to distinguish clearly during bedside testing. **Clinical Pearls for NEET-PG:** * **Material:** Tuning forks are ideally made of **Aluminium** or **Magnesium** (lightweight and produce a pure tone) rather than steel. * **Rinne Test:** A "False Negative Rinne" is seen in severe Unilateral Sensorineural Hearing Loss (SNHL) due to transcranial transmission of sound to the better ear. * **Weber Test:** Sound lateralizes to the **poorer ear** in Conductive Hearing Loss and to the **better ear** in Sensorineural Hearing Loss.

Question 46: Which of the following conditions is associated with a Carha's notch in an audiogram?

A. Otospongiosis (Correct Answer)
B. Chronic suppurative otitis media (CSOM)
C. Meniere's disease
D. Acoustic neuroma

Explanation: **Explanation:** **Carhart’s Notch** is a classic audiometric finding pathognomonic for **Otospongiosis** (Otosclerosis). It is characterized by a dip in the bone conduction threshold, most prominent at **2000 Hz**. 1. **Why Otospongiosis is correct:** In otosclerosis, stapes fixation occurs. This mechanical stasis interferes with the normal resonance of the ossicular chain (which typically peaks around 2 kHz). This results in a "pseudo-sensorineural" loss where bone conduction appears reduced at 2000 Hz. Importantly, this is a mechanical artifact, not true cochlear damage, and the notch often disappears after a successful stapedectomy. 2. **Why the other options are incorrect:** * **CSOM:** Typically presents with a conductive hearing loss due to tympanic membrane perforation or ossicular necrosis, but does not show the specific 2 kHz bone conduction dip. * **Meniere’s Disease:** Characterized by low-frequency sensorineural hearing loss (upsloping curve) and recruitment, not a mechanical notch. * **Acoustic Neuroma:** Presents with retrocochlear high-frequency sensorineural hearing loss and poor speech discrimination scores. **High-Yield Clinical Pearls for NEET-PG:** * **Schwartz Sign:** A flamingo-pink flush seen on the promontory due to increased vascularity in active otospongiosis. * **Gelle’s Test:** Negative in otosclerosis (no change in hearing with increased ear canal pressure). * **Bezold’s Triad:** Includes negative Rinne test, prolonged Schwabach test, and low-limit frequency rise (Gelle negative). * **Treatment of Choice:** Stapedotomy or Stapedectomy (using a Teflon piston). * **Medical Management:** Sodium fluoride (to mature active foci).

Question 47: Which of the following is NOT a mechanism of bone conduction?

A. Vibrations of the air column in the external auditory canal
B. Vibrational inertia of the ossicles
C. Vibration of the inner ear
D. Air conduction through the tympanic membrane (Correct Answer)

Explanation: **Explanation:** Bone conduction (BC) is the process by which sound vibrations are transmitted to the inner ear through the bones of the skull, bypassing the normal air conduction pathway. **Why Option D is Correct:** **Air conduction through the tympanic membrane** is the primary mechanism of the **Air Conduction (AC)** pathway, not bone conduction. In AC, sound waves travel through the external canal, vibrate the tympanic membrane, and are amplified by the ossicles before reaching the cochlea. Since the question asks for what is NOT a mechanism of BC, this is the correct answer. **Analysis of Incorrect Options (Mechanisms of BC):** * **Option A (Inertial BC of External Canal):** When the skull vibrates, the air column in the external auditory canal also vibrates. these waves strike the tympanic membrane. This is known as the **Osseotympanic mechanism**. * **Option B (Ossicular Inertia):** Due to their inertia, the ossicles do not move in perfect sync with the vibrating skull. This relative movement causes the stapes footplate to move in the oval window, stimulating the cochlea. * **Option C (Distortional/Compressional BC):** Direct vibration of the skull causes periodic compression and expansion of the bony labyrinth, directly displacing the inner ear fluids and stimulating the hair cells. **Clinical Pearls for NEET-PG:** * **Occlusion Effect:** Closing the external ear canal enhances bone conduction (specifically the osseotympanic component), making the sound louder. This is the basis for the **Bing Test**. * **Carhart’s Notch:** A characteristic dip in the bone conduction threshold at **2000 Hz** seen in Otosclerosis, caused by the loss of the ossicular inertial component. * **Weber Test:** Lateralizes to the ear with better cochlear function in SNHL and to the ear with a conductive deficit in CHL.

Question 48: A lady has bilateral hearing loss for 4 years, which worsened during pregnancy. What type of impedance audiometry graph will be observed?

A. Ad
B. As (Correct Answer)
C. B
D. C

Explanation: ### Explanation The clinical presentation of **bilateral progressive hearing loss** that **worsens during pregnancy** is a classic hallmark of **Otosclerosis**. In Otosclerosis, new spongy bone forms around the stapes footplate, leading to its fixation in the oval window. This increases the stiffness of the ossicular chain. Since impedance audiometry (Tympanometry) measures the compliance of the middle ear system, a stiffened ossicular chain results in a **Type As** tympanogram. #### Analysis of Options: * **Type As (Correct):** The 's' stands for **Stiffness** or **Shallow**. It shows a normal peak pressure (0 daPa) but a low compliance (reduced peak height). This is characteristic of stapes fixation (Otosclerosis) or malleus fixation. * **Type Ad:** The 'd' stands for **Discontinuity** or **Deep**. It shows a very high peak, indicating a hypermobile tympanic membrane, usually seen in **ossicular discontinuity** or a thin, monomeric TM. * **Type B:** A **flat graph** with no peak. This indicates fluid behind the drum (**Serous Otitis Media**) or a TM perforation (distinguished by large canal volume). * **Type C:** Shows a peak shifted to **negative pressure** (<-100 daPa). This indicates **Eustachian tube dysfunction**. #### Clinical Pearls for NEET-PG: 1. **Schwartze Sign:** A flamingo-pink flush seen on the promontory due to increased vascularity in active otosclerosis (Otospongiosis). 2. **Carhart’s Notch:** A characteristic dip in the bone conduction threshold at **2000 Hz** on Pure Tone Audiometry. 3. **Gelle’s Test:** Negative in Otosclerosis (indicates fixed ossicles). 4. **Treatment of Choice:** Stapedotomy (using a Teflon piston). 5. **Pregnancy Link:** Hormonal changes (estrogen) can accelerate the progression of the disease.

Question 49: Which test is used to assess middle ear function?

A. Caloric test
B. Galvanic test
C. Impedance audiometry (Correct Answer)
D. Brainstem electric response audiometry (BERA)

Explanation: **Explanation:** **Impedance Audiometry (Tympanometry)** is the gold standard for assessing middle ear function. It is an objective test that measures the compliance (mobility) of the tympanic membrane and the status of the middle ear ossicles as air pressure is varied in the external ear canal. It helps diagnose conditions like otitis media with effusion (Type B tympanogram), ossicular discontinuity (Type Ad), or otosclerosis (Type As). **Analysis of Incorrect Options:** * **Caloric Test:** This is a test of the **vestibular system** (specifically the lateral semicircular canal). It uses water or air of different temperatures to induce nystagmus, assessing the peripheral vestibular apparatus. * **Galvanic Test:** This also evaluates the **vestibular system**, but unlike the caloric test, it bypasses the sense organs to stimulate the vestibular nerve directly. It helps differentiate between end-organ lesions and nerve lesions. * **BERA (Brainstem Electric Response Audiometry):** This is an objective electrophysiological test used to assess the **auditory pathway** from the cochlear nerve to the brainstem. It is primarily used for hearing screening in infants and diagnosing retrocochlear pathologies like Acoustic Neuroma. **High-Yield Clinical Pearls for NEET-PG:** * **Type A Tympanogram:** Normal middle ear function. * **Type B (Flat):** Fluid in the middle ear (Serous Otitis Media) or a TM perforation. * **Type C:** Eustachian tube dysfunction (negative pressure). * **Stapedial Reflex:** A component of impedance audiometry; its absence is an early sign of facial nerve palsy (proximal to the nerve to stapedius) or otosclerosis.

Question 50: Sensorineural hearing loss (SNHL) is seen in all except?

A. Nail-patella syndrome
B. Distal interphalangeal joint involvement
C. Baer syndrome
D. Alport syndrome (Correct Answer)

Explanation: The question asks to identify the condition that is **NOT** typically associated with Sensorineural Hearing Loss (SNHL). ### **Explanation of the Correct Answer** **D. Alport Syndrome:** This is actually a classic cause of **bilateral SNHL** (specifically high-frequency loss) associated with progressive glomerulonephritis and ocular defects (lenticonus). The question appears to be a "reverse" or "except" style question where the options provided in the prompt might be misaligned with the standard medical literature. In standard ENT textbooks, Alport syndrome is a **hallmark** cause of SNHL. However, if we evaluate the options based on the provided key: * **Note on Question Accuracy:** In standard NEET-PG patterns, Alport, Nail-Patella, and certain syndromes involving distal joints (like distal symphalangism) are all associated with SNHL. If Alport is marked as the "except," it may be due to a specific examiner's focus on the *type* of hearing loss or a potential error in the source question's key. ### **Analysis of Options** * **A. Nail-Patella Syndrome:** An autosomal dominant disorder (LMX1B gene) characterized by hypoplastic nails, absent patellae, and renal dysplasia. It is frequently associated with SNHL. * **B. Distal Interphalangeal Joint Involvement:** Several syndromes (e.g., **Symphalangism**) involve fusion of the DIP joints and are classically associated with **Conductive Hearing Loss** (due to stapes fixation), though SNHL can occur in complex variants. * **C. Baer Syndrome:** A rare condition involving SNHL and other systemic features. ### **High-Yield Clinical Pearls for NEET-PG** 1. **Alport Syndrome:** Remember the triad: **"Can't see (Lenticonus), Can't pee (Nephritis), Can't hear (SNHL)."** It involves a defect in Type IV Collagen. 2. **Waardenburg Syndrome:** Most common cause of autosomal dominant SNHL; look for white forelock and heterochromia iridis. 3. **Usher Syndrome:** Most common cause of congenital deaf-blindness (SNHL + Retinitis Pigmentosa). 4. **Pendred Syndrome:** SNHL associated with multinodular goiter (Mondini dysplasia of the cochlea). 5. **Jervell and Lange-Nielsen Syndrome:** SNHL + Prolonged QT interval (risk of sudden death).

Practice by Chapter

Hearing Assessment Techniques

Practice Questions

Tympanometry and Acoustic Reflexes

Practice Questions

Otoacoustic Emissions

Practice Questions

Auditory Brainstem Response

Practice Questions

Hearing Aids

Practice Questions

Cochlear Implants

Practice Questions

Bone-Anchored Hearing Devices

Practice Questions

Speech and Language Development

Practice Questions

Articulation Disorders

Practice Questions

Stuttering

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Dysphonia

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Rehabilitation of Hearing-Impaired Children

Practice Questions

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