Lower Motor Neuron Lesion causes:

Lower Motor Neuron Lesion causes:

• A. Hyperreflexia
• B. Spasticity
• C. Flaccidity
• D. Tremor

Answer: (C)

Lower motor neuron lesions damage the final pathway to the muscle, so the muscle loses its normal tone and reflex responses. This produces a flaccid, limp appearance with weak or absent deep tendon reflexes and quick muscle wasting over time. That is why flaccidity is the best choice here. By contrast, signs like hyperreflexia and spasticity arise from upper motor neuron lesions, where the brain’s inhibitory influence is lost and reflexes become exaggerated and muscles become stiff. Tremor isn’t a hallmark feature of an LMN lesion; it’s more associated with other nervous system issues. So the LMN lesion hallmark you’re looking for is flaccidity.

Lower motor neuron lesions damage the final pathway to the muscle, so the muscle loses its normal tone and reflex responses. This produces a flaccid, limp appearance with weak or absent deep tendon reflexes and quick muscle wasting over time. That is why flaccidity is the best choice here. By contrast, signs like hyperreflexia and spasticity arise from upper motor neuron lesions, where the brain’s inhibitory influence is lost and reflexes become exaggerated and muscles become stiff. Tremor isn’t a hallmark feature of an LMN lesion; it’s more associated with other nervous system issues. So the LMN lesion hallmark you’re looking for is flaccidity.