pns Flashcards

The meningeal branch of the spinal nerve actually reenters the
vertebral canal to innervate the meninges and blood vessels

TRUE

In the somatosensory system there are no third order neurons in the cerebellum

TRUE

There are 41 pairs of spinal nerves

FALSE

the glossopharyngeal nerve is the only cranial nerve that contains
sensory fibers

FALSE

the musculocutaneous nerve is a major nerve of the brachial plexus

TRUE

The second cranial nerve forms a chiasma at the base of the brain for
partial crossover of the neural fibers

TRUE

The only cranial nerve to extend beyond the head and neck region are
the vagus nerves

TRUE

The dorsal ramus consist only of motor fibers bringing information to
the spinal cord.

FALSE

Dermatomes are skin segments that relate to sensory innervation
regions of the spinal nerves

TRUE

Dorsal and ventral rami are similar in that they both contain sensory
and motor fibers

TRUE

Irritation of the phrenic nerve may cause diaphragm spasms called hiccups

TRUE

The obturator nerve branches from the sacral plexus

FALSE

Reciprocal inhibition means that while one sensory nerve is
stimulated, another sensory neuron for synergistic muscles in the same
area is inhibited and cannot respond

FALSE

External strabismus and ptosis could be caused by damage to the
oculomotor nerve

TRUE

In order to regulate motor activity, to start and stop movements, and
to coordinate postural movements, the cerebellum and basal nuclei are involved.

TRUE