Motor system

High school (ages 12+)
Human Body

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/motor-system

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary descending tracts?Corticospinal (pyramidal) and brainstem pathways (extrapyramidal)
2. What is the neural integration point?Lower motor neurons in the spinal cord and brainstem
3. How does my brain decide when to move?The motor cortex in the brain plans and starts voluntary movements. It sends signals down the pyramidal tract to the spinal cord.
4. What is the pyramidal tract and why is it important?The pyramidal tract is a bundle of nerve fibers that carries signals from the brain to the spinal cord. It helps us do fine, skilled movements like writing or playing a piano.

Upper Motor Neurons: Neurons originating in the brain and brainstem that control lower motor neurons.
Lower Motor Neurons: Neurons in the spinal cord and brainstem that directly innervate skeletal muscles.
Neuromuscular Junction: The specialized synapse where a motor neuron communicates with a muscle fiber.