LMN and vestibular quiz

Question 1

What are the 5 components of the lower motor neuron (LMN)?

Answer 1

• Ventral horn (motor) neurons
• Nerve roots
• Peripheral nerve
• Neuromuscular junction
• Muscle

Question 2

What key clinical features that are most helpful in distinguishing central from peripheral disease?

Answer 2

• Mentation (CD: may be depressed)
• Postural reactions (PD: no deficits)
• Character of nystagmus (CD: vertical or position changing)
• Presence or absence of other cranial nerve involvement (PD: CN VII, CD: CN V-XII)
• Presence of paradoxical signs (in CD)