Exam 15: Peripheral Nervous System

Herpes zoster is a unique viral infection that almost always affects the skin of a single dermatome.

The cervical plexus:

Match each cranial nerve with its function or description. -sends fibers to the carotid sinus,which helps regulate blood pressure

Each optic nerve contains fibers from both retinas.

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

Which of the following is not a branch of the trigeminal nerve?

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

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

The two optic nerves join at the optic chiasma.

Conduction by the sixth cranial nerve results in sensations of hearing.

The nerves emerging from the lower lumbar and sacral regions branch from a structure called the cauda equina,not the spinal cord itself.

The spinal root that possesses a swelling is the dorsal root.

The dorsal root ganglion contains motor neuron cell bodies.

Nerve plexuses of the thoracic region innervate the abdominal organs.

The peripheral nervous system contains only efferent nerves.

The abducens nerve abducts the upper arm.

Nerve impulses over the _____ nerve cause increased peristalsis and decreased heart rate.

Match each cranial nerve with its function or description. -sends fibers to the superior oblique muscle of the eye

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 peripheral nervous system consists of 43 pairs of nerves and their branches.