What symptom is indicative of damage to the lower motor neuron?

• A. Hypotonia
• B. Spasticity
• C. Diminished reflexes
• D. Muscle hypertrophy

Answer: (C)

The correct symptom indicative of damage to the lower motor neuron is diminished reflexes. Lower motor neurons are responsible for directly innervating skeletal muscles and conveying motor commands from the central nervous system. When these neurons are damaged, there is a disruption in the reflex arc, leading to a decline in the ability to produce reflexive contractions. This results in diminished or absent reflexes, which is a hallmark sign of lower motor neuron impairment.

In contrast, hypotonia refers to decreased muscle tone, which can occur with lower motor neuron damage but is not as direct an indicator as diminished reflexes. Spasticity, on the other hand, is associated with upper motor neuron damage and is characterized by increased muscle tone and exaggerated reflexes. Muscle hypertrophy can occur for various reasons, including prolonged use or overstimulation of muscles, but it doesn't specifically point to lower motor neuron involvement. Thus, diminished reflexes is the most specific indicator of lower motor neuron damage among the options provided.