Exam 21: Peripheral Nervous System

There is almost no overlap in the dermatomes of the body.

The phrenic nerve is found in the _____ plexus.

Normal infants will show the Babinski reflex up to the age of _____ years.

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

By age 2 years in a normal infant, the stimulus that once caused the Babinski reflex now causes:

Which of the following is not a plexus of the spinal nerves?

Match each cranial nerve with its function or description. -Supplies muscles of the tongue; name means "under the tongue"

Which is not true of the ventral nerve root?

The accessory nerve is unique among the cranial nerves, because none of its fibers originate in the brain.

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:

It would be normal to find a functioning Babinski reflex in an infant as young as 4 months old.

There are 31 pairs of spinal nerves, all of which consist of both motor and sensory fibers.

Efferent neurons carry information away from the CNS; afferent neurons carry information toward the CNS.

If a reflex causes cardiac muscle to contract, it can be either a somatic or an autonomic reflex.

The axons of the olfactory nerve form about 20 small bundles that pierce the cribriform plate to enter the brain.

Most "motor" cranial nerves carry proprioceptive sensory fibers.

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

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

Describe the basic principles of somatic motor pathways.

Which of the following is a correct statement?