**Core Concept**
Tabes dorsalis is a chronic, progressive neurological disorder resulting from syphilitic infection of the dorsal columns of the spinal cord. It is characterized by degeneration of the posterior columns, leading to loss of proprioception, vibration sense, and other sensory modalities.
**Why the Correct Answer is Right**
Deep tendon reflexes are typically diminished or absent in tabes dorsalis due to the involvement of the posterior columns, which contain the proprioceptive fibers responsible for reflex arc integrity. The loss of proprioception disrupts the normal function of the reflex arc, resulting in decreased or absent deep tendon reflexes. This is in contrast to other conditions that may cause hyperreflexia.
**Why Each Wrong Option is Incorrect**
**Option A:** Tabes dorsalis is indeed seen in neurosyphilis, specifically in the tertiary stage, where the infection has progressed to involve the central nervous system.
**Option C:** Loss of vibration sense is a hallmark feature of tabes dorsalis, resulting from the degeneration of the posterior columns.
**Option D:** Acute abdominal pain and visceral symptoms can occur in tabes dorsalis due to the involvement of the autonomic nervous system and the resulting dysfunction of the visceral reflexes.
**Clinical Pearl / High-Yield Fact**
Tabes dorsalis is often associated with a classic triad of symptoms: lightning pains (sudden, stabbing pains in the extremities), loss of vibration sense, and Romberg's sign (impaired balance and stance when standing with eyes closed).
**β Correct Answer: B. Deep tendon reflexes are brisk**
Free Medical MCQs Β· NEET PG Β· USMLE Β· AIIMS
Access thousands of free MCQs, ebooks and daily exams.
By signing in you agree to our Privacy Policy.