Chap 14- Part 1 Flashcards
What is the total number of pairs of spinal nerves
.
How many pairs of spinal nerves are in each of the five anatomic divisions of the spinal cord?
.
Functions of cervical and lumbosacral enlargements
Cervical - houses neurons that innervate the shoulder and upper limbs
Lumbosacral - houses the neurons that innervate pelvis and lower limbs
What is the one exception in terms of the number of spinal nerves matching the number of vertebrae in a particular body region
Cervical vertebrae
Five atomic subdivisions of the spinal cord
Cervical
Thoracic
Lumbar
Sacral
Coccygeal
How does the one exception take place
Because we start at the top of the atlas and all the nerves are in between the vertebrae so the 8th pair is in between c7 and t1
What are spinal cord meninges
Structures and spaces encircling the spinal cord
What are three spaces associated with spinal cord meninges
Epidural space
Subdural space
Subarachnoid space
Which space associated with spinal cord meninges contains CSF
Subarachnoid space
What is the best location of the spinal cord to have a lumbar puncture (spinal tap)
Just above or below L4
The spinal cord extends inferiorly from the brain at the Foramen magnum through the vertebral canal and ends at the level of ______ vertebra
L1 vertebra
Identify conus medullaris
End marking the end of spinal cord proper
Identify filium terminale
Thin strand of pia mater
Identify denticulate ligaments
Triangular extensions of spinal pia mater
Attach to dura mater
What is cauda equine
Nerve roots projecting from spinal cord
Where is gray mater in spinal cord
Inner region of vertebrae
The gray matter may be subdivided into the following components:
Anterior horns that house (cell bodies / axons) of (somatic motor / sensory neurons)
Cell bodies
Somatic motor neurons
The gray matter may be subdivided into the following components:
Lateral horns that house cell bodies of ______ _______ neurons
Visceral motor
The gray matter may be subdivided into the following components:
Lateral horns are found in T?-L? Parts of spinal cord only
Thoracic and lumbar
The gray matter may be subdivided into the following components:
Posterior horn that house axons of (somatic motor / sensory) neurons and the cell bodies of _______
Sensory
Interneurons
The cell bodies of the sensory neurons connected to the spinal cord are located in the dorsal root _______
Ganglion
What is the gray commisure
Connects masses of gray matter
Encloses central canal
Bridge portion of gray matter
Location of white matter in spinal cord
Outside the Gray matter center
Name three anatomic divisions of white matter
Funiculi
Anterior white commisure
Tracts
General composition of:
Funiculi
Long ropes
Areas of white matter on spinal cord sides
General composition of:
Anterior white commisure
Interconnects anterior funiculi
General composition of:
Tracts
Bundles of axons
What canal does he grey commisure surround
Central canal
A conduction pathway consists of a tract and a nucleus. A tract is defined as?
Axon bundle
A conduction pathway consists of a tract and a nucleus. A nucleus is a?
Collection of neuron cell bodies
