Upgrade to remove ads
Only $2.99/month

Chapter 13—A&P Part 1

Terms in this set (42)

Which structures enclose and protect the spinal cord?
The vertebral bones and the spinal meninges
What is the anatomy of the vertebral bones?
Each vertebral bone has an opening that align to form the vertebral canal which contains the spinal cord
What is meningitis?
inflammation of the meninges
The spinal meninges are...
continuous with the cranial meninges
What are the spinal meninges? Superficial to deep
Dura to arachnoid to pia
What is the function of the spinal meninges?
The spinal meninges protect the spinal cord by securing it, cushioning it and isolating it from its surroundings
Dura mater
The dura mater is the outermost layer of the spinal meninges
What does the dura mater consist of?
The dura mater consists of collagen fibers that make it tough
What happens at the end of the dura mater?
The distal end of the dura tapers and joins the filum terminale of the pia mater to form the coccygeal ligament
What is the epidural space?
space between dura mater and bony vertebrae
What is the epidural space filled with?
Filled with adipose tissue and blood vessels
What is the epidural space the site of?
Epidural anesthesia
What is the subdural space?
space between the dura mater and the arachnoid mater
Arachnoid mater
Middle layer of the spinal meninges
What is the subarachnoid space?
the space between mater and the arachnoid mater
What is the subarachnoid space filled with?
CSF
What is a spinal tap?
below L2, withdraws CSF for analysis
The blood vessels of the subarachnoid space
deliver blood to the spinal cord and run along the surface of the pia mater
Pia mater
Innermost layer of the spinal meninges
What is the pia mater made of?
fibrous mesh of collagen and elastic fibers
What does the pia mater do?
adheres to the spinal cord
What are the modifications of the pia mater?
Denticulate ligaments and filum terminale
What are denticulate ligaments?
Bilateral tooth shaped extenstions of the pia mater that secure the spinal cord and prevent lateral movement
What is the filum terminale?
extension of the pia mater extends from conus medullaris and joins the dura to form the coccygeal ligament
How long and wide is the spinal cord?
eighteen and half inches long and a half inch wide
What are the enlargements of the spinal cord?
cervical and lumbar enlargements
What do the nerves of the cervical enlargement supply?
Upper limbs
What do the nerves of the lumbar enlargement supply?
Lower limbs
Which vertebral bones does the spinal cord end at?
L1 and L2
What is the conus medullaris?
tapered end of the spinal cord
What is the cauda equina?
nerve roots extending inferiorly from the conus medullaris
The spinal cord is so highly organized that
it is possible to predict the results of an injury to a specific area of the spinal cord
The spinal cord is divided into
segments
How many cervical segments of the spinal cord?
8
How many cervical vertebrae are there?
7
How many thoracic segments of the spinal cord?
12
How many lumbar segments of the spinal cord?
5
How many sacral segments of the spinal cord?
5
How many coccygeal segments of the spinal cord?
1
Where does a spinal nerve originate from?
spinal cord segment with the same name
What is the anterior median fissure?
deep depression on the anterior, or ventral, side of the spinal cord
What is the posterior median sulcus?
shallow depression on the posterior, or dorsal, side of the spinal cord
YOU MIGHT ALSO LIKE...