bio ch14

From superficial to deep, put the following meninges and their related spaces in the correct order.

1. dura subduera arachnoid subarachnoid pia matter

There are ___ pairs of spinal nerves that exit the vertebral column.

31

Each side of the spinal cord gives rise to _____ cervical nerves.

8

Which of the following accurately compares sections of spinal white matter?

A fasciculus is smaller than a funiculus.

Which spinal nerves contribute to the brachial plexus?

C5-T1

What is the correct order for the parts of the spinal cord, from superior to inferior?

Cervical - thoracic - lumbar - sacral - coccygeal

The most inferior spinal nerve is

Co1

What is the correct order for the parts of the spinal cord, from superior to inferior?

c t l s c

The plexuses that lie on either side of the neck are the _____ plexuses.

cervical

The __________ enlargement of the spinal cord is the location where nerves that supply the upper limbs enter and leave the spinal cord, and the __________ enlargement is the location where nerves that supply the lower limbs enter and leave the spinal cord.

cervical, limbosacral

The inferior tip of the spinal cord is the ___________ part.

coccygeal

A specific segment of skin supplied by a single spinal nerve is a ___________.

dermatome

Which statement accurately describes spinal nerves?

each spinal nerve is mixed in that it contains some sensory axons and some motor

The space that lies between the dura mater and the periosteum of the vertebrae, and houses areolar connective tissue, blood vessels, and adipose connective tissue is the ___________ space.

epidural

The function of upper motor neurons is to

excite or inhibit lower motor neurons.

The spinal dura mater contains an outer periosteal layer and an inner meningeal layer.

false

The white matter of the spinal cord is surrounded by its grey matter.

false

White matter in the spinal cord is found surrounding the gray matter, as well as within the lateral horns.

false

Two of the nerves of the lumbar plexus are the

femoral and obturator nerves.

The spinal cord extends from the level of the _______________ to the level of the ____________.

foramen magnum, first lumbar vertebra

Classify the given items with the appropriate group. Fibular

from the posterior division of the sciatic nerve. splits into the superficial and deep fibular nerves

Classify the given items with the appropriate group. Tibial

other

The ____________ nerve arises from the cervical plexus and innervates the diaphragm.

phrenic

Which of the following statements is correct about spinal nerves?

posterior root is sensory

Which nerve of the sacral plexus is the largest and longest nerve in the body?

sciatic

Which space associated with the spinal cord meninges contains cerebrospinal fluid?

subarachnoid

Intercostal nerves are the anterior rami of which spinal nerves?

t1-t11

Where the sciatic nerve splits, it branches directly to the

tibial and common fibular nerves.

The subdural space is the region between the arachnoid mater and the dura mater.

true

A spinal nerve splits into ___ branches.

two

Which accurately describes sensory and motor pathways?

Sensory pathways terminate in the brain, and motor pathways terminate at effectors.

Fill in the blanks with the terms provided. Not all terms will be used. The left and right lumbar plexuses are formed from the anterior rami of spinal nerves L1-L4 located lateral to the same vertebrae and along the psoas major muscle in the posterior abdominal wall. The lumbar plexus is subdivided into anterior and posterior ____________ .

The left and right lumbar plexuses are formed from the anterior rami of spinal nerves L1-L4 located lateral to the same vertebrae and along the psoas major muscle in the posterior abdominal wall. The lumbar plexus is subdivided into anterior and posterior ____________ .

Fill in the blanks with the terms provided. Not all terms will be used.

The tapering inferior end of the spinal cord is called the conus medullaris. This structure marks the official "end" of the spinal cord proper (usually at the level of the first lumbar vertebra). Inferior to this level, nerve roots collectively called the cauda equina project inferiorly from the spinal cord. These nerve roots are so named because they resemble a horse's tail. Within this "horse's tail" is the filum terminale. This is a thin strand of pia mater that helps anchor the conus medullaris to the coccyx.