Download Endocrine System: Overview

Somatic Sensory and Motor Pathways
Directions:
a. Insert your Regulations CD.
b. Click the “Contents” button.
c. Open the Nervous System File.
d. Click Animations.
e. Click Somatic Sensory and Motor Pathways.
Introduction
1.
What are neural pathways?
2. What are the functions of somatic receptors and sensory pathways?
3. What is the function of motor pathways?
Somatic Sensory Pathways
4. Three neuron types are needed for a somatic sensory pathway. Describe the role of
each.
a. First Order Neurons
b. Second Order Neurons
c. Third Order Neurons
5. How do somatic sensory nerve impulses get to the brain stem from the head itself?
6. Identify the three pathways somatic impulses entering the spinal cord ascend to the
brain.
7. Describe the following for the Posterior Column-Medial Lemniscus Pathway.
a.
Perceptions conducted -
b. Brain reception region 8. Describe the following for the Anterolateral Spinothalamic Pathway.
a.
Perceptions conducted -
b. Brain reception region _______________________________________________________
9. Describe the following for the Spinocerebellar Pathway.
a.
Perceptions conducted -
b. Brain reception region -
Somatic Motor Pathways
9. What two main somatic motor pathways convey action potentials to skeletal muscles?
10. Describe the role of each part of a direct motor pathway.
a.
Upper Motor Neurons -
b. Interneurons c.
Lower Motor Neurons -
d. Primary Motor Area and Motor Cortex -
11. What are the functions of the indirect motor pathway?
12. Generally describe the routes taken by the axons of upper motor neurons of indirect motor pathways.
13. Why are lower motor neurons referred to as the final common pathway?