Exam 3 Flashcards
what does the ligamentum nuchae turn into as it becomes thinner down the spinal cord
supraspinous ligament
what ligament goes in between the spinous process
interspinous ligament
what ligaments must you pass through to do an epidural
supraspinous
interspinous
ligamentum flavum
what ligament attaches vertebrae to each other
ligamentum flavum
what ligament is deep to the spinal cord
posterior longitudinal ligament
what space are you in when you poke through the ligamentum flavum
epidural space
what really makes up the epidural space
fat and veins laying on top of the dura mater
what structure gives popping sensation as needle punctures for epidural
ligamentum flavum
where does the spinal cord end
L1, L2
what are the areas of major branching of the peripheral nerves on the spinal cord
cervical and lumbosacral enlargement
what branch of nerves come off the cervical enlargement
brachial plexus
what do the nerves coming off the lumbosacral enlargement supply
lower extremities
where does nervous tissue stop on the spinal cord
conus medullaris at L1-L2
what is the name of the structure where the spinal cord ends
conus medullaris
what structure extends off tapering point of conus medularis
filum terminale
what structure attaches the coccygeal vertebrae to the conus medullaris
filum terminale
what are the parts of the filum terminale
dural and pial parts
what vertebrae does the pial part of the filum terminale correspond with
L1-S2
what vertebrae does the dura part of the filum terminale correspond with
S2-coccygeal vertebrae
what wraps around pia giving it strength
dura
what is the function of the filum terminale
hold spinal cord in alignment so it does not bounce around
what are the meningeal layers
dura
arachnoid
pia
what meningeal lays against the skull and vertebral column
dura mater
what meningeal layer lies beneath the dura mater
arachnoid mata
what lies beneath the arachnoid mater
subarachnoid space
what is contained within the arachnoid space
CSF and vessels
what meningeal layer is beneath the subarachnoid space
pia mater
what meningeal layer is tightly adhered to the brain and spinal cord
pia mater
what are the two sections of the spinal cord
grey and white matter
what makes up the internal matter of the spinal cord
grey matter
what is contained in grey matter
neurons
how much more neurons do men have than women
6%
what is the function of the grey matter
activates the nervous system
where is the central canal located
grey matter of the spinal cord
what flows through the central canal
CSF
how much more white matter do women have than men
10x more
what is the function of the spinal cord white matter
pathway to carry messages
what runs through the anterior median fissure
anterior spinal artery
what are the anterior and posterior structures of the white matter
anterior median fissure and posterior median sulcus
what lies on the either side of the posterior median sulcus
posterior spinal arteries
what supplies a great deal of the spinal cord
posterior intercostal artery
what are the spinal veins called
posterior/ anterior spinal vein
what is deep to the extradural fat
dura mater
what is infiltrated with medication during epidural
extradural fat
what structure needs to be penetrated for a spinal
through dura into the subarachnoid space
what attaches pia to the dura
denticulate ligament
what weaves between dorsals and ventral nerve roots to stabilize spinal cord
denticulate ligament
what spinal nerve roots are sensory
posterior roots
what spinal nerve roots are motor
anterior roots
what is an enlargement outside of central nervous system containing neurons
ganglion
what determines how and when message gets to where it needs to go
ganglion
what nerves have short pre ganglion and long post ganglion going to organ
sympathetic
is there a parasympathetic chain ganglion
no
where does the parasympathetic response come from
medulla oblongata and pelvic splanchnic nerves
what are the roots of the pelvic splanchnic nerves
S2
S3
S4
what nerves have long pre ganglion and short post ganglion going to organ
parasympathetic
how many cervical nerve roots are there
8
how many thoracic nerve roots are there
12
how many lumbar nerve roots are there
5
how many sacral nerve roots are there
5
how many coccygeal nerve roots are there
1-3
what does the cuada equina innervate
provide ability to move and feel sensation in legs and the bladder
what sinus runs the length of the brain
superior sagital sinus
what are the sinuses in the brain made of
dura mater
what meningeal layer helps to hold brain intact and from crashing into each other
dura mater
what part of dura separates left and right brain hemispheres
falx cerebri
what part of the dura separates right and left cerebellum
falx cerebelli
what part of the dura separates cerebri from cerebellum
tentorium cerebelli
what is the connection between the hypothalamus and the pituitary gland
infundibulum
what is the covering over the pituitary gland keeping it on sella turcica
diaphragma sellae
what lobe is found by separating the frontal/parietal and temporal lobes
insular lobe
what are the lobes of the brain
frontal
parietal
occipital
temporal
insular
cerebellum
what are the raised portion of the brain
gyri
what are the canals of the brain called
sulci
what structure is the pituitary gland in
sella turcica
what fissure separates right and left brain hemispheres
longitudinal fissure
what sulcus separates frontal from parietal lobe
central sulcus
what sulcus separates temporal lobe from frontal/parietal
lateral sulcus
what separates parietal and occipital lobes
parieto-occipital sulcus
what are the precentral and post central gyri in relation to
central sulcus
what are precentral gyri responsible for
motor
what are the post central gyri responsible for
sensory
what structure in the brain connects the right and left hemisphere
corpus callosum
what brain structure is larger in women
corpus callosum
what makes up walls of the lateral ventricles
corpus callosum
what connects right and left thalamus
interthalamic adhesion
what lobe is the uncus on
temporal lobe
what artery is directly underneath the uncus
middle cerebral artery
why is the uncus herniating significant
it can occlude the middle cerebral artery causing a stroke
what structure us immediately underneath the septum pellicidum
fornix
what is the fornix responsible for
short term memory
what does the fornix continue into posteriorly
hippocampus
what is the hippocampus responsible for
long term memory
what is the survival portion of the brain
amygdala
is the amygdala bigger in male or female
male
what makes the lateral walls of the 3rd ventrical
thalamus
what makes CSF
choroid plexus
where are coroid plexus located
in all ventricles
what is normal csf pressure
7-12mmHg
how much csf is made each day
450-600cc
how much csf is there in the body at one time
150cc
what makes melatonin
pineal body
what is responsible for circadian rhythms
pineal body
what is the thin piece of tissue walling off the lateral ventricles
septum pellucidum
what makes the anterior and posterior walls of 3rd ventricle
anterior and posterior commissure
what holds memory of smell
mammillary bodies
what does the fornix turn into anteriorly
mammillary bodies
what is the cerebral peduncle responsible for
smoothing/tapering movement