Understanding Vestibular Disorders

The video tutorial covers the Dix-Hallpike test, highlighting the latency and symptoms of vertigo and nystagmus. It explains vestibular neuritis and Alexander's Law, noting how eye movements can indicate the condition. The suppression of nystagmus through fixation and the presence of torsional components are discussed. Finally, the video explores central causes of nystagmus, emphasizing direction changes and potential causes like ketamine.

What is the term used to describe the delay before symptoms appear in the Dix-Hallpike maneuver?

• Interval

• Pause

• Latency

• Duration

In the Dix-Hallpike maneuver, what happens to the nystagmus and vertigo after about 15 seconds?

• They intensify

• They remain constant

• They improve

• They worsen

What is the primary focus of the first section of the video?

• Alexander's law

• Dix-Hallpike maneuver

• Central cause nystagmus

• Suppression of nystagmus

What is challenging to observe in the second example of the Dix-Hallpike maneuver?

• Vertical nystagmus

• Torsional component

• Latency period

• Vertigo

According to Alexander's law, how does nystagmus change with eye movement in vestibular neuritis?

• It increases in size

• It decreases in size

• It remains constant

• It disappears completely

Which condition is associated with Alexander's law?

• Dix-Hallpike maneuver

• Torsional nystagmus

• Vestibular neuritis

• Central cause nystagmus

What can suppress nystagmus in a patient with vestibular neuritis?

• Loud noise

• Closing eyes

• Fixation on a point

• Rapid movement

What is a typical feature of nystagmus in vestibular neuritis?

• No movement

• Torsional component

• Vertical movement

• Horizontal movement

In the case of central cause nystagmus, what determines the direction of nystagmus?

• Head position

• Eye color

• Age of patient

• Direction of gaze

What is the fast component of nystagmus directed towards in central cause nystagmus?

• The nose

• The ear

• The ceiling

• The floor