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102 Cards in this Set
- Front
- Back
plane that divides brain into R/L portions |
sagittal |
|
plane that divides brain into anterior and posterior sections |
coronal |
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other names for a bundle of axons |
tract lemniscus fasciculus column peduncle capsule |
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bundle of axons in PNS called |
peripheral nerve |
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group of cell bodies in PNS called |
ganglie |
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groups of cell bodies in CNS called |
nuclei |
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groups of cell bodies on surface of brain is called |
cortex |
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groups of cell bodies deep in CNS are called |
nuclei |
|
connect only with other neurons |
interneurons |
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functional unit of NS |
neuron |
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non neuronal cells that provide service to neurons |
glia |
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peripheral components of the somatic NS include |
axons, sensory nerve endings, glial cells |
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peripheral components of autonomic system includes |
entire neurons, sensory nerve endings, synapses, ganglia, and glia |
|
all parts of nervous system encased in vertebral column |
spinal region |
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axons attached to spinal cord are with in the vertebral column until they |
exit intervertebral foramen |
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the spinal cord extends from___ to ____ |
foramen magnus to the conus medullaris ( l2/L3)
|
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how many segments does the spinal cord have |
31 with a pair of spinal nerves from each sement |
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nerves are connected to the spinal cord via |
by dorsal and ventral roots |
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enlargement of dorsal root shows__________ which are |
-dorsal root ganglia - cell bodies of sensory neurons |
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spinal nerves are formed by |
union of dorsal and ventral root |
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spinal nerve exits vertebral column via_______ and divides into________ |
- intervertebral foramen - dorsal and ventral primary rami |
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what is shaped like an "H" and has ventral, dorsal, and lateral horns |
a cross section of the spinal cord |
|
horns contain |
- cell bodies of motor neurons - interneurons - endings of sensory nerves |
|
ventral column, lateral column, dorsal column are areas with in |
the white matter of a cross section of spinal cord |
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brain stem contains |
medulla, pons, mid-brain, cranial nerves |
|
brain stem connects |
spinal cord with cerebral region |
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many of these travel through the brain stem and other begin or end within the brain stem |
fiber tracts |
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the brainstem contains groups of neurons which control |
- equilibrium - cardio vascular activity - respiration - other functions |
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what is equilibrium |
sensations of head movement, orientation to vertical, postural adjustments |
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which structure is continuous with the spinal cord |
medulla |
|
oval bump on lateral surface of medulla |
olive |
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pyramid |
axons projecting from cerebral cortex to spinal cord, crosses mid line here (called decussation) |
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medulla has how many cranial nerves |
4 |
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what is superior to the medulla and anterior to the cerebellum |
pons
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the pons contains |
tracts, nuclei, 4 cranial nerves |
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what is superior to the pons |
mid brain |
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anteriorly the mid brain contains |
2 cerebral peduncles with fibers descending from cerebral cortex |
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dorsally the mid brain contains |
4 rounded bodies: - 2 superior and 2 inferior colliculi - 2 cranial nerves |
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what are colliculi important for |
orientation to stimuli |
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how many pairs of cranial nerves |
12 |
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cranial nerves typically innervate what? and what is the exception
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- head/neck/face - vagus nerve which innervates abdominal and thoracic viscera and structures of the head and neck |
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some cranial nerves are purely _____ others are mostly ______ that respond to _______ |
- sensory - motor/sensory - movement |
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______ is connected to brain stem by large bundles of fibers called______ |
-cerebellum - peduncles |
|
structure and function of the cerebellum |
- 2 large cerebellar hemispheres, and a midline vermis - coordinate movement |
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cerebellar hemispheres are composed of |
cortex and deep nuclei |
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the diencephalon is with in the |
cerebrum |
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the diencephalon consists of |
- thalamus - hypothalamus - epithalamus - sub-thalamus |
|
nuclei in center of cerebrum which relays info to cerebral cortex |
thalamus |
|
what type of info does the thalamus relay and what does it regulate |
- emotional, some memory, and sensation ( touch, visual) - regulates consciousness, arousal, attention |
|
jobs of the hypothalamus |
- body temp, metabolic rate, chemical compositions and eating - growth/function of reproductive organs -expression of emotion and defensive behavior
|
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epithalamus contains |
pineal gland |
|
job of pineal gland |
secretes melatonin influences sleep/wakefulness cycles |
|
subthalamus |
part of the neural circuit controlling movement |
|
the cerebral hemispheres surface structure |
gyri ( elevations) and sulci ( grooves) |
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the_______ has 6 lobes |
cerebral hemispheres |
|
lobes of the cerebral hemisphere |
- frontal - parietal - temporal - occipital - limbic - insular |
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the central sulcus on the cerebral hemispheres divides |
frontal and parietal lobes |
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the lateral sulcus of the cerebral hemispheres divides |
temporal and frontal lobes |
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cerebral cortex is responsible for |
- appreciating sensory info and creating motor movement - verbal language and non verbal communication - personality, intelligence, memory, reasoning |
|
commissures are |
bundles of axons that connect right and left hemispheres of the cerebrum and convey info between them |
|
huge commissure |
corpus callosum |
|
a group of axons which projects from the cerebral cortex connecting cortical and sub-cortical structures |
internal capsule |
|
with in white of hemispheres are additional areas of gray known as |
deep nuclei |
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the most important deep nuclei in cerebrum |
basal ganglia |
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basal ganglia circuit helps to |
control movement |
|
limbic system is with in |
cerebrum |
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greatest deep cerebral nuclei with in the limbic system is the |
amygdala |
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the hippocampus is in what lobe and is included in what system |
- temporal - limbic |
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the limbic system is involved in |
- emotions - processing of some memory |
|
regulates consciousness, arousal, attention |
thalamus |
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cerebrospinal fluid fills______ then it _____ and finally _______ |
the ventricles then circulates on surface of CNS and then is reabsorbed into venous blood system |
|
ventricles are |
four continuous cavities within brain |
|
the meningies are part of what system |
cerebrospinal system |
|
modified filtrate of plasma |
cerebrospinal fluid |
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locations of ventricles |
1st/2nd: paired lateral in cerebral hemspheres 3rd: slit in diencephalon 4th: posterior to pons and medulla and anterior to cerebellum ..and continues through medulla and spinal cord as central canal |
|
CSF secreted by |
choroid plexus with in ventricles |
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lateral ventricals are connected to the 3rd vent via |
interventricular foramina |
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3rd and 4th ventricals connected by |
cerebral aqueduct |
|
dura mater |
outer most layer, seen grossly, 2 projections that separate parts of the brain: falx cerebri and tentorium cerebellie |
|
falx cerebri separates |
cerebral hemispheres |
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tentorium cerebelli separates |
cerebral hemisphere from cerebellum |
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can see grossly, middle meninges |
arachnoid |
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innermost meninges, cant see grossly |
pia |
|
dura sinuses |
within dura return CSF and venous blood to jugular veins |
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CSF regulates_____and provides_____ |
- contents of extracellular fluid - buoyancy to CNS |
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provide most of blood to cerebrum and divided into________ |
- 2 internal carotid arteries - anterior and middle cerebral arteries |
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the middle cerebral artery supplies |
lateral surface of cerebral hemispheres |
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supply blood to medulla and upper spinal cord |
2 vertebral arteries |
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vertebral arteries join to form |
basilar artery |
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basilar artery supplies |
-pons and cerebellum |
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basilar artery divides to become |
posterior cerebral arteries |
|
posterior cerebral arteries supply |
midbrain and interposterior cerebrum |
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anterior, middle, and posterior arteries form____ which is located on _____ |
- circle of willis - inferior surface or cerebrum |
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venous blood from ______ drains into______ and then drains into ______ |
- cerebrum - dural sinuses ( dura mater) - jugular veins |
|
categories of lesions |
- focal - multifocal - diffuse |
|
focal lesion |
single location ( ie: tumor in spinal cord) |
|
multifocal lesion |
several, non symmetrical locations ( tumor that has metastasized) |
|
diffuse lesion |
affecting bilateral symmetrical structures ( Alzheimer's) |
|
what do you need to know from a structured interview regarding the history section of a neurological evaluation |
- speed of onset - cause -pattern of progression - mental status |
|
acute onset ( minutes to hours) usually indicates |
vascular problems |
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sub-acute onset ( progressing to max symptoms and symptoms over several days) frequently indicates |
inflammatory process |
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chronic onset ( gradual worsening for weeks or years) indicates |
tumor or degenerative disease |