Discuss the concept of an “upper motor neuron†vs a “lower motorneuronâ€. List all the neurons and their motor system pathways thatmight be considered upper motor neurons. Describe the consequencesof a lesion to an upper motor neuron and a lower motor neuron. Thisanswer should address issues of muscle tone, reflexes, and anyother characteristics that help to differentiate between upper andlower motor neuron lesions. Give some common examples (i.e.diseases, dysfunctions, trauma) when these respective lesions wouldoccur. What is the prognosis for recovery from UMN and LMN lesions.What are the differences between spasticity, rigidity, decerebraterigidity and decorticate rigidity?
