Vestibular Quiz Quiz

1. What is the endolymphatic duct?

A tube that connects the ear to the throat for equalizing pressure.

A sensory receptor responsible for balance within the inner ear.

A passageway for blood circulation in the inner ear.

Where the endolymph drians- a problem with this duct causes both vestibular and cochlear problems. Shunts endolymph from the cochlear and vestibular system. Drains in the subdural area. A small membranous canal connecting with the saccule and the utricle ofthe membranous labyrinth and terminating in the endolymphatic sac.

The endolymphatic duct is a structure in the inner ear that plays a crucial role in maintaining balance and proper function of the cochlear system. It does not function as a passageway for blood, a connection to the throat, or a sensory receptor.

Explanation

The endolymphatic duct is a structure in the inner ear that plays a crucial role in maintaining balance and proper function of the cochlear system. It does not function as a passageway for blood, a connection to the throat, or a sensory receptor.

2. What is the function of the cristae ampularis in the inner ear?

The cristae ampullaris regulate blood flow in the inner ear.

The cristae ampullaris assist with balance in the inner ear.

The cristae ampullaris help with hearing in the inner ear.

The crista ampullaris is the sensory organ of rotation located in the semicircular canal of the inner ear. The function of the crista ampullaris is to sense angular acceleration and deceleration. Bulge on the semicircular canal. One is the crista ampullaris, multiple is cristae ampularis. At the "ampulated end" of the semicircular canals.

The cristae ampullaris is specifically responsible for sensing angular acceleration and deceleration, not related to hearing, blood flow, or general balance in the inner ear.

Explanation

The cristae ampullaris is specifically responsible for sensing angular acceleration and deceleration, not related to hearing, blood flow, or general balance in the inner ear.

3. What is the common crux?

A popular brand of cereal.

The one common branch of the superior/posterior SSC, non ampulated end

The highest point of a mountain.

A type of musical instrument.

The common crux refers to the one common branch of the superior/posterior SSC, non ampulated end. It is related to a specific anatomical structure and not to musical instruments, cereal brands, or mountain peaks.

Explanation

The common crux refers to the one common branch of the superior/posterior SSC, non ampulated end. It is related to a specific anatomical structure and not to musical instruments, cereal brands, or mountain peaks.

4. What three systems are involved in balance?

Visual, proprioceptive/somatosensory, vestibular

Central nervous system, peripheral nervous system, autonomic nervous system

Auditory, olfactory, gustatory

Cardiac, respiratory, endocrine

Balance involves the integration of information from three main systems - visual, proprioceptive/somatosensory, and vestibular - to maintain stability and orientation in space.

Explanation

Balance involves the integration of information from three main systems - visual, proprioceptive/somatosensory, and vestibular - to maintain stability and orientation in space.

5. What is the cause of vertigo?

Excessive caffeine consumption.

Lack of sleep.

Build-up of earwax in the ear canal.

A disconnect between the 3 systems involved in balance (vestibular, proprioceptive, visual)- usually a spinning sensation

Vertigo is mainly caused by a mismatch between the signals sent to the brain by the three systems involved in balance, not by earwax build-up, caffeine consumption, or lack of sleep.

Explanation

Vertigo is mainly caused by a mismatch between the signals sent to the brain by the three systems involved in balance, not by earwax build-up, caffeine consumption, or lack of sleep.

6. What is considered to be 'true vertigo'?

An inner ear infection affecting balance temporarily.

Problem with the vestibular system, disconnected with the other systems.

The feeling of losing your balance when standing up too quickly.

Dizziness caused by dehydration or fatigue.

True vertigo specifically refers to a problem with the vestibular system only, without involvement of other systems, leading to a sensation of spinning or movement when there is no actual movement.

Explanation

True vertigo specifically refers to a problem with the vestibular system only, without involvement of other systems, leading to a sensation of spinning or movement when there is no actual movement.

7. What is the feeling of disequilibrium?

State of equilibrium

Sense of harmony

Being off balance

Feeling of contentment

Disequilibrium refers to a state of being off balance, hence 'Being off balance' is the correct answer.

Explanation

Disequilibrium refers to a state of being off balance, hence 'Being off balance' is the correct answer.

8. What is congenital nystagmus?

Nystagmus caused by external factors

Nystagmus without balance issues

Nystagmus related to neurological disorders

Nystagmus without balance issues

Congenital nystagmus is a condition where rhythmic, involuntary eye movements occur from birth. It is not related to balance issues, external factors, or neurological disorders.

Explanation

Congenital nystagmus is a condition where rhythmic, involuntary eye movements occur from birth. It is not related to balance issues, external factors, or neurological disorders.

9. What organs are involved in the vestibular system/apparatus (canals and otolith organs) in the inner ear?

4 total semicircular canals (2 on each side) 1 otolith organ on each side (utricle).

3 total semicircular canals (1 on each side) 2 otolith organs on each side (utricle and lagena).

6 total semicircular canals (3 on each side)2 otolith organs on each side (utricle and saccule)

5 total semicircular canals (2 on one side, 3 on the other) 3 otolith organs on each side (utricle, sacule, and lagena).

The vestibular system in the inner ear consists of 6 semicircular canals (3 on each side) and 2 otolith organs on each side (utricle and saccule). The incorrect answers provided do not accurately represent the number and type of organs involved in the vestibular system.

Explanation

The vestibular system in the inner ear consists of 6 semicircular canals (3 on each side) and 2 otolith organs on each side (utricle and saccule). The incorrect answers provided do not accurately represent the number and type of organs involved in the vestibular system.

10. What are the name and location of each of the semicircular canals?

Circular/medial - perpendicular to the floor. Inferior/posterior - corresponds with shaking head 'no' and nodding. Anterior/superior - corresponds with head tilt and shaking head.

Horizonal/lateral- parallel w/ the floor, at a 30 degree angle, which is why we have to raise a pt 30 degrees so that this canal is parallel with the floor. Corresponds with the movement that happens when you shake your head "no" Superior/anterior- corresponds with the movement that happens when you nod your head "yes" Posterior/inferior- Corresponds with the head tilt

The correct answer describes the specific names and locations of the semicircular canals in the inner ear. These canals play a crucial role in maintaining balance and detecting head movements.

Explanation

The correct answer describes the specific names and locations of the semicircular canals in the inner ear. These canals play a crucial role in maintaining balance and detecting head movements.

11. What fluid is found inside the bony labyrinth and membranous labyrinth?

Endolymph in the bony labyrinth, perilymph in the membranous labyrinth

Blood in the bony labyrinth, mucus in the membranous labyrinth

Cerebrospinal fluid in both the bony and membranous labyrinth

Perilymph is in the bony larbiynth, endolymph is in the membraneous labryinth

The correct answer is perilymph in the bony labyrinth and endolymph in the membranous labyrinth due to their specific roles in maintaining balance and transmitting signals for hearing within the inner ear structures.

Explanation

The correct answer is perilymph in the bony labyrinth and endolymph in the membranous labyrinth due to their specific roles in maintaining balance and transmitting signals for hearing within the inner ear structures.

12. What is the vestibule?

The vestibule is the central part of the osseous labyrinth, and is situated medial to the tympanic cavity, behind the cochlea, and in front of the semicircular canals.

The vestibule is a type of musical instrument used in orchestras.

The vestibule is an organ in the human body responsible for balancing.

The vestibule is a small room or hall before the main entrance of a building.

The vestibule in this context refers to a specific anatomical structure within the ear.

Explanation

The vestibule in this context refers to a specific anatomical structure within the ear.

13. What is the ductus reuniens?

A structure in the eye that regulates the amount of light entering.

A muscle that controls the movement of the eustachian tube in the ear.

A short membranous tube passing from the lower end of the saccule to the cochlear duct of the vestibular labyrinth. Cochlea to the saccule. Causes dizziness from loud sounds, if there is an abnormal connection.

A branch of the vagus nerve responsible for taste sensation in the back of the tongue.

The ductus reuniens is a short membranous tube connecting the saccule and cochlear duct in the vestibular labyrinth, not a muscle in the ear, a nerve branch related to taste, or an eye structure.

Explanation

The ductus reuniens is a short membranous tube connecting the saccule and cochlear duct in the vestibular labyrinth, not a muscle in the ear, a nerve branch related to taste, or an eye structure.