objectives four
Biomedical Science 427 with Taylor at Grand Valley State University
About this deck
By: Marci Westman
Created: 2011-10-10
Size: 42 flashcards
Views: 1
Created: 2011-10-10
Size: 42 flashcards
Views: 1
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astrocytes help for the ___
BBB
which glia cell is in the CNS? which is in PNS?
oligoendrocyte, and schwann cells
what do radial glia cells do?
provide a scaffolding onto which the maturing nuerons can migrate to more superficial levels.
what kind of cells are at the nueroepithelial sheet?
nuerons and glia---which is radial glia.
what zone is in the neiroepithelial sheet and what does it contain?
Ventricular zone and it has the progenitor of nuerons and glia and pseudostratified columnar epitheliam
which layer contains synaptic connections but lacks nuerons?
layer one
which layer contains small neurons that make intracorticol connections; association and commissural fibers.
layer two
which layer has medium sized neurons that give rise to associaional and commissural fibers
three
which layer contains giant pyramidal (betz) neurons that give rise to extracorticol projections fibers to the basal ganglia, brain stem and spinal cord
layer 5
which layer contains association and projection neurons to the thalamus?
layer 6
agranular cortex vs granular location
agranular post central gyrus
granular-precentral gyrus
granular-precentral gyrus
granular or agranular .."output neurons"
granular
granular or agranular...pyramidal cells that give rise to long axons in 2-5 layers
granular
agranular or granular..fewer large pyrimdal cells
agranular
granular or agranular..lots of dark specles
granular
granular or agranular...less thick
agranular
agranular or granular..project mostly to adjecant cortical areas
agranular
migration pathology-disruption of gene that regulate adherence and shape of cells.
periventricular heterotopia
what happends with periventricular heterotopia?
the migration of nuerons from the ventrical layer to te superficial layer of developing cortex. This causes an accumulation of nonmigratory cells around at lateral ventricles
inapprop localization of gray matter within white matter..
double cortex
smooth brain--no gyri or sulci
lissencephaly
what is lissencephaly caused by
viral infection in early pregnancy
t or f periventricular heterotrpia causes seizures in adolescence
true
ms effect myelination of white matter by _______
oligodendrocytes
commisural fibers
corss midline interconnect corresponding corticol areas of 2 hemispheres.
examples of commisural fibers
corpus callosum and anterior commisure
associaltional fibers
one part of cortex to other WITHOUT crossing hemishperes
Projectional fibers
pass in both directions btwn cortex and subcortical centers
arcuate fibers
interconnect neigboring gyri
connects frontal, parietal and temporal lobes medially
cingulum
inferior occipital frontal fasciculus
passes below the insula from the frontal lobe through the temporal lobe and back to the occipital lobe. contributes to visual recognition
superior longitudinal fasciculus
above insula from frontal lobe to posterior portions of hemisphere where it fans out among parietal, occipital and temporal lobes
uncinate fasciculus
"hook" around the margin of the lateral surface to interconnect anterior and inferior parts of frontal cortex and the anterior temporal cortext . Important in regulation of behavior
what are the associational fibers?
cimgulum fibers , superior longitudinal fasciculus, inferior longitudinal fasciculus, uncinate fasciculus and arcuate fibers
what are the types of commisural fibers
corpus callosum and anterior commisure
what are the parts of the corpus callosum
rostrom genu body splenium
where is the anterior commissure located?
inferior to the corpus callosum (looks like an appendix)
a lesion of the superior longitudinal fasciculus can produce _______
conduction aphasia
conduction aphasia
relatively good comprehension and spontaneous speech but poor repetition of a sentence spoken by the examiner
what is disconnected with conduction aphasia?
posterior sensory language area (werknickes) and anterior motor language area (brocas area)
t or f with conduction aphasia they cannot repeat nonsence words, only words that have meaning
true
About this deck
By: Marci Westman
Created: 2011-10-10
Size: 42 flashcards
Views: 1
Created: 2011-10-10
Size: 42 flashcards
Views: 1
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy