21 Questions
Which condition is characterized by the reactivation of chicken pox in dorsal root ganglia?
Hrps zoster (shingles)
What is the typical region affected by Tabes dorsali?
Lumbar region
Which nerve disorder can affect axons, myelin, or both?
Neuropathies
What is a common symptom of neuropathy that affects the distal limbs in a glove and stocking pattern?
Progressive sensory ataxia
Which nerve disorder can be caused by an overdose of pyridoxine (vitamin B6)?
Neuropathies
Which structure within the inner ear detects angular acceleration around three orthogonal axes?
Semi-circular canals
Which nerve disorder is characterized by the slow degeneration of dorsal columns, roots, and ganglia in the spinal cord?
Tabes dorsali
What is the mechanism by which an overdose of pyridoxine (vitamin B6) causes peripheral neuropathy?
Reduced blood supply to nerves
In neuropathy, what is the common pattern of sensory loss and paresthesias that typically occurs?
Glove and stocking pattern
What structure in the inner ear detects angular acceleration along three orthogonal axes?
Semicircular canals
Which autoimmune response can lead to polyneuritis and inflammation affecting multiple nerves?
Lupus
What is a common symptom associated with ganglionopathies?
Balance problems
What is the main function of hair cells within the ampulla adjacent to the utricle in the inner ear?
Detecting angular acceleration
What is the role of endolymph fluid in detecting head movements?
It lags behind during head movements, deflecting hair cell receptors
What consequence does untreated syphilis have on the spinal cord after 10-30 years?
Proprioceptive loss and ataxic gait
Which part of the body is typically affected by distal symmetric polyneuropathy?
Distal limbs like hands and feet
What is the function of the semi-circular canals in the inner ear?
Detect angular acceleration
Where are the hair cells responsible for detecting head movements located in the inner ear?
Ampulla
What happens to the firing rate of hair cell receptors in response to deflection in the utricle?
Increases
How are the cilia of hair cells within the semi-circular canals protected?
Encased in gelatinous material (cupola)
What occurs to the firing rate of hair cell receptors during deceleration?
Decreases
Learn about sensory disorders such as herpes zoster (shingles) and tabes dorsalis, including the reactivation of chickenpox virus in dorsal root ganglia and the degeneration of spinal cord components. Explore the symptoms and effects of these conditions.
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