13. The Peripheral Nervous System

Which of the following somatic sensations is not carried by the posterior columns?

a. Tactile senses

b. Temperature

c. Proprioception

d. Stretch

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

a. The somatic sensory division of the PNS detects sensory stimuli from the organs in the thoracic and abdominopelvic cavities.

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. The somatic motor division of the PNS consists of lower motor neurons that directly innervate skeletal muscle fibers.

Why is visceral pain often perceived as cutaneous pain?

How do upper and lower motor neurons differ?

List and describe the basic steps involved in producing movement, beginning with the upper motor neurons in the cerebral cortex.

The lower motor neurons that innervate contractile skeletal muscle fibers are called:

a. α-motor neurons

b. β-motor neurons

c. upper motor neurons

d. γ-motor neurons

Explain why you lose both motor and sensory function of a part of your body when a spinal nerve is numbed with anesthetic agents.

When Mr. Williams goes to the emergency department with pain in the area along the midline of the diaphragm, he worries he is having a heart attack. Could the pain be related to his heart? Could it be related to any other organ(s)? Explain.

What are the three major somatic sensory pathways and their functions?

Ramin presents for evaluation after a severe shoulder injury during which his entire brachial plexus suffered damage. What effects would you expect Ramin to have from this injury?