Physical Therapist Assistant (PTA) Elevation Practice Test

Which type of lesion is cerebral palsy most commonly associated with?

Upper motor neuron (UMN) Lower motor neuron (LMN) Mixed UMN and LMN Peripheral nerve

Correct Answer:

Upper motor neuron (UMN)

Explanation:

Cerebral palsy is linked to injury in the brain’s descending motor pathways, especially the corticospinal tract. That makes upper motor neuron involvement the hallmark. When these pathways are affected during development, the result is spasticity, increased reflexes, and other signs of UMN dysfunction. In contrast, lower motor neuron issues produce flaccid weakness with fasciculations and muscle atrophy, and peripheral nerve problems have a different pattern and distribution. So the lesion most commonly associated with cerebral palsy is an upper motor neuron one, which explains the typical spastic presentations and brisk reflexes seen in this condition.

Access more questions from this quiz

Continue to Physical Therapist Assistant (PTA) Elevation Practice Test for more practice questions and the full quiz experience.

Access More Questions