Spinal cord and spinal Nerves Flashcards
nerve block
loss of sensation in a region due to injection of local anesthetic
neuralgia
attacks of pain along the entire course of branch of a sensory nerve
neuritis
inflammation of one or several nerves that result from irritation to nerve - direct blows, bone fractures, etc
What are the 3 menegies which cover the spinal cord and the brain
dura matter, arachnoid mater & pia matter
The spinal cord begins as a continuation of the _______________ and ends at about the ____________ as an adult
medulla oblongata; second lumbar vertebra
What on the spinal cord serves as points of origin for nerves to the limbs
cervical and lumbar enlargements
the tapered inferior portion of the spinal cored is the ___________, from which arise the_____________ and ____________
conus medullaris, filum terminale and cauda erquna
How may roots do the spinal nerves connect to each segment of the spinal cord
2
the posterior root contains _____________ and the andterior or vental root contains ______________
sensory axons, motor neuron axons
conus medullaris
tapered portion of the spinal cord inferior to the lumbar enlargement between L1-L2
filum terminale
non nervous fibrous tissue of the spinal cord that extends inferior from the conus medullaris to the coccyx
cauda equina
a tail like array of roots of spinal nerves the the inferior end of the spinal cord L2-coccxy
posterior root
have 2 roots, anterior and posterior - where it exits or enters the spinal cord.
structure composed of sensory axons lying between a spinal nerve and the dorsolateral aspect of the spinal cord
posteior root ganglion
cluster of nerve cells
a group of cell bodies of sensory neurons and their supporting cells located along the posterior root for a spinal nerve
anterior root
the structure composed of axons of efferent neurons that emerges from the anterior aspect of the spinal cord and extends laterally to join a posterior root forming a spinal nerve, also called a ventral root
dura matter
most superficial of the 3 spinal meninges, composed of dense irregular connective tissue
arachnoid matter
the middle menix, avascular covering delicate collagen fibers and elastic fibers, deep to dura mater
epidural space
between the dura mater and the wall of the vertebral canal
subdural space
between dura mater and the arachnoid mater which contains interstitial fluid
subarachnoid - where is it
between the arachnoid mater and the pia mater is the subarachnoid space, which contains the cerebral spinal fluid
denticulate ligaments
triangular shaped m. extension of the pia mater suspend the spinal cods
anterior median fissure
deep wide groove on the ventral side, groove
posterior median sulcus
shallow narrow groove
grey and white commissures
grey is the crossbar inside of the spinal cord,
