Exam 21: Peripheral Nervous System

The plantar reflex consists of a curling under of all the toes, plus a slight turning in and flexion of the anterior part of the foot.

Which plexus contains nerves that innervate the lower part of the shoulder and the entire arm?

The glossopharyngeal nerve supplies fibers to the carotid sinus, which has a role in the control of blood pressure.

After radiation treatment, Jake experienced a painful eruption of red, swollen plaques that ruptured and later crusted over. Soon after the eruption of the vesicles, Jake complained of burning and itching in the affected dermatome. These symptoms are most likely a result of what condition?

Match each cranial nerve with its function or description. -Sends fibers to the occipital lobe and the superior colliculi

All reflexes have their interneurons in the spinal cord.

The peripheral nervous system includes cranial nerves.

Match each term with its description or definition. -Group of skeletal muscles that receive axons from one spinal nerve

Tic douloureux is a painful neuralgia of the _____ nerve.

The vagus nerve contains both sensory and motor fibers.

Somatic reflexes are contractions of smooth muscles.

At all stages of development, a positive Babinski reflex always means destruction of pyramidal tract fibers.

Only spinal nerves from the sacrum form the sacral plexus.

Match each term with its description or definition. -Skin surface area that is supplied by one spinal nerve

Identify the major nerve plexuses and which spinal nerves join to form each of them.

Because the distribution of nerves to skeletal muscle is arranged into specific myotomes, a skeletal muscle can be innervated by axons from only one spinal nerve.

What is the difference between a somatic reflex and an autonomic reflex?

The trochlear nerve stimulates movement of the eye.

Most of the optic nerve fibers terminate in the cerebellum.

The nerve commonly called the vagus nerve is the _____ cranial.