In motor neuron disease MND. all are true except?
A. Peripheral sensory conduction velocities are normal
B. Function of glossopharyngeal nerve is frequently affected
C. The onset of bulbar palsy indicates a poor prognosis
D. The abdominal reflexes are usually preserved
A. Peripheral sensory conduction velocities are normal
B. Function of glossopharyngeal nerve is frequently affected
C. The onset of bulbar palsy indicates a poor prognosis
D. The abdominal reflexes are usually preserved
Ans.
B. The function of the glossopharyngeal nerve is frequently affected
Some patients have vague sensory
symptoms in the early stages of MND and limb pain is a surprisingly frequent
problem later in the disease. However sensory signs are never present.
Essential to the diagnosis is the demonstration that the peripheral sensory
conduction velocities are normal. The glossopharyngeal nerve is purely sensory
and so is not affected in MND, thus severe bulbar problems may be present, but
palatal sensation is normal. The prognosis for life in MND once bulbar symptoms
develop is usually measured in months. The abdominal reflexes, which usually
disappear in the face of upper motor neurone lesions, are often strangely
preserved in MND, the explanation is unknown.
