The spinal cord and spinal nerves Flashcards
What is another name for the ventral plate?
Basal plate
List the number and names of the spinal cord enlargements.
There are 2 enlargements.
- Cervical enlargement
- Lumbar enlargement
What is another name for the dorsal plate?
Alar plate
How many pairs of spinal nerves are there?
There are 31 pairs of spinal nerves
- 8 cervical
- 12 thoracic
- 5 lumbar
- 5 sacral
- 1 coccygeal
What are the first things to come off of the spinal cord?
The rootlets
Name the meningeal coverings
- Dura mater
- Arachnoid mater
- Pia mater
Name the spaces related to the spinal cord and its coverings
- Subdural space
- Subarachnoid space
- Epidural space
Where is the epidural space located?
Spinal dura is separated from the periosteum-covered bone and the ligaments that form the walls of vertebral column; Between the dura mater and the spinal column itself
Were is the cerebrospinal fluid located/found?
The subarachnoid space
What is the denticulate ligament?
Projections of pia mater that help to anchor the cord to the dural sac.
What types of information do the roots of spinal nerves carry?
Either sensory OR motor information
What types of information do the rami carry?
Both sensory and motor
What is the intervertebral foramen?
Space where spinal nerves converge and exit the column
Do the ventral or dorsal rami tend to be thicker? Why?
The ventral rami then to be thicker because of its larger distribution
The dorsal rami carry which types of information?
Sensory AND motor information
The ventral rami carry which types of information?
Sensory AND motor information
The dorsal roots carry which types of information?
Sensory information
The ventral roots carry which types of information?
Motor information
What is a dermatome?
An area of the skin that is innervated by the sensory fibers of a single nerve root
What is a myotome?
A group of muscles that is primarily innervated by the motor fibers of a single nerve root.
- you will more than likely get overlapping for a myotome
Location of the intercostobrachial nerve?
T-2
Whats are the principal plexuses?
- Cervical plexus
- Brachial plexus
- Lumbar plexus
- Sacral plexus
