Exam 21: Peripheral Nervous System

The abducens nerve fibers originate in the medulla oblongata.

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

Explain the difference between the Babinski reflex and the plantar reflex. What does a positive Babinski reflex in an adult indicate?

Which is the only plexus that contains fibers from the thoracic region of the spinal cord?

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

The two optic nerves join at the optic chiasma.

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

When responding to stimulation of the outer margin of the sole of the foot, a 1-year-old infant extends her great toe without fanning of the other toes. This happens because:

The peripheral nervous system includes _____ nerves.

Tic douloureux is a painful neuralgia of the _____ nerve.

The spinal ganglion is located only on the ventral nerve root.

The peripheral nervous system contains only efferent nerves.

Even though there are only seven cervical vertebrae, that region generates eight cranial nerves.

The oculomotor nerve contains fibers from the autonomic nervous system.

Match each cranial nerve with its function or description. -Involved in both hearing and equilibrium

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

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

Sympathetic chain and sympathetic rami refer to the same structure.

Which part of the vertebral column has one more pair of nerves coming from it than it has vertebrae?

When referring to a spinal nerve, the terms dorsal root and dorsal ramus refer to the same structure.