Cerebrum - meiniges - neuroglia -brain barriers Flashcards
(52 cards)
بسم الله الرحمن الرحيم
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grey matter fromed of ?
white matter formed of?
grey : nerve cells - neroglia - blood capillaries
White matters: nerve fibers - neuroglia -blood capillaries
Cerebral cortex is thinnest in
preimary sensory area
Cerberal cortex is thickest in ?>
Motor area and assoication area
most numerous cells in cerebtal cortex ?
pyramidal cells
The apex of pyramidal cell directed to,,while the axons to,,,,,
surface
whilte matter
Cells of inner pyramidal layer project to spinal cord and brainstem as projection fibers ,,,,?
Corticospinal
Corticobulbar
Corticopontine projection fibers
Granule cells of cerebral cortex dexribe dendrites and axons
-dendrites short in the same layer others long to the surface
-Axons terminate in the deep cortical layers
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Fusiform cell describe/
SPINDLE shaped with axons from the middle of the body and dendrites from each side
Triangular cell in all layers
with ascending axons reaching the superifical layers
Cells of Martinotti
Spindle shape in superficial layers theri axons pass horizontally within these layers
Horizontal cells of caja l
Mention layers of cerebral cortex
moleuclar
External granular
External pyramidal
Internal granular
internal pyramidal
Plexiform
Layer of ceerebral cortex with
neuroglia
small horizontal neve cells
Tangential fibers
moleuclar layer!
External granular layer contains?
Closely packed granule cells dendrites asecding to molecular layer
axons deep to deep cortical layers
Small and medium pyramidal cells are in ?
Exteranl pyramidal layer
Outer band of baillarger appears in ?>
Internal granular layers with granule cells
Internal pyramidal layers contaitns?
Betz cells +
Inner band of baillarger
Plexifrom layer has
Mutliform cells + fusiform cells merging with white matter
comparre motor and sensory cortex
motor cortex thicker and has less granule cells than sensory cortex
and more pyramidal cells in layer 3 and 4 and 5
comparre motor and sensory cortex
motor cortex thicker and has less granule cells than sensory cortex
and more pyramidal cells in layer 3 and 4 and 5
Radial fibers of cerebral cortex dex
Afferents: thalamocortical
efferents : Corticospinal
corticonuclear cortioreticular corticopontine
Horizontal fibers of cerebral cortex
Tangential f
Outer and inner bands of Baillarger which are terminals of afferents to synapse with cortical fibers
Single tough layer of fibrous tissue
Fused with periostem of the skull
Non Vascular
Separating and forming Dural venous sinuses
Inner surface lined by endothelium
separated from the arachanoid by subdural space
Dura matter
Arahcnoid matter
it is ,,,,,,, layer with direct contact with dure
The outermost cells of the arachanoid (barrier cell) are bounded to one another by …….. that seal subarachanoid space from extracellular space in dura
Numerous Arahcnoid trabculae of ,,,,,,,and,,,,,,,,,, cross subarachanoid space reach
In certain areas arahacnoid projects to the dural venous sinuses forming ,,,,,,,,,,
Fibrocellular
))))))))))))))
Tight junctions
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Fibrous collagen elastic
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Arahcnoid villi in venous sinuses
Pia matter
It invest brain completely
Covering gyri lining sulci
Fusing ,,,,, of the CNs and with ,,,,,, to form choroid pleux
Fibrocellular layer:!
Contaitn layre of ,,,,, cells joined by ,,,,,,, and,,,,,,,,and,,,,,,,,,
epinureium
ependymals
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Leptomeneingeal
Desmosmes
,gap junctions and
tight junctions
