Exam 21: Peripheral Nervous System

The vestibulocochlear nerve is sometimes called the acoustic nerve.

Thoracic spinal nerves are the only segment of spinal nerves that do not participate in a plexus.

The olfactory nerve has dendrites in the inferior turbinates of the nose.

The phrenic nerve is found in the _____ plexus.

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

Each spinal nerve attaches to the spinal cord by means of two short roots-a ventral root and a dorsal root.

The ventral rami of all spinal nerves subdivide to form complex networks called plexuses.

The trigeminal nerve gives rise to the ophthalmic nerve, the maxillary nerve, and the zygomatic nerve.

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

The brachial plexus is the only plexus that contains a thoracic spinal nerve.

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

The optic tract contains fibers from both retinas.

The lumbar plexus gives rise to the _____ nerve.

Match each term with its description or definition. -Plexus from which femoral nerve emerges

Somatic reflexes are contractions of smooth muscles.

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.

The dorsal root ganglion contains motor neuron cell bodies.

Nerve plexuses of the thoracic region innervate the abdominal organs.

Match each term with its description or definition. -Reflexes that involve skeletal muscles

A patient has a severe case of the hiccups. The physician injects an anesthetic solution into the neck about an inch above the clavicle. What nerve was injected, and what is the result?