Download subarachnoid space

Limbic System
Limbic lobe
Hippocampal formatiom
Hipocampus
2
Limbic System
Limbic Lobe (Cortex)
Hippocampal formation
Related Subcortical Nucle
Amygdala
Septal Area
Corticomedial group
Parahippocampal gyrus
Bsolateral group
Cingulate gyrus
Insula
Some parts of Diencephalon
Some nuclei of Midbrain
Limbus = A ring
• A ring of cortex
around Corpus
Callosum and
Diencephalon
4
Hippocampal
formation
Hippocampus
Dentate
Subiculum
5
6
Anatomy of Hippocampus
8
Limbic functions
Regulate Emotional
& Motivational
aspect of Behaviour
Changing short-term
Memory into long-term
Memory (Learning)
Cornu Ammonis
• Hippocampus = Ammon,s horn (Cornu)
after Egyptian deity with ram,s head
• For research purpose, it is divided into 4
cornu ammonis (CA) zones :
– CA1
– CA2
– CA3
– CA4
10
Connections of hippocampus
• 1- Perforant pathway from entorhinal
area to dentate gyrus
• 2- Axons from dentate to pyramidal cell
in CA3 sector
• 3- Axons from CA3 to fimbria
• 4- A branch from the CA3 fiber called
Schaffer collateral, projects to CA1
• 5- CA1 projects to entorhinal cortex
Afferent Connections to
Hippocampus
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•
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•
•
•
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10 Groups of fibers pass to Hippocampus:
1- Fibers from cingulate gyrus
2- Fibers from septal area
3- Fibers from opposite hippocampus
4- Fibers from indusium grisum
5- Fibers from enthorhinal or olfactory area
6- Fibers from dentate and subiculum
Afferents connections cont…
• 6- From auditory, visual, olfactory
association cortex
• 7- Cholinergic fibers from septal area
• 8- Noradrenergic fibers from ceruleus
nucleus
• 9- Cerotonergic fibers from raphe nuclei
• 10- Dopaminergic fibers from ventral
tegmental area
Downloaded from: Gray's Anatomy (on 14 September 2007 07:23 PM)
© 2007 Elsevier
Branches Of Basilar Artery
• Pontine
• Labyrinthine Artery
• Anterior Inferior
Cerebellar Artery
• Superior Cerebellar
Artery
• Posterior Cerebral
Artery
Downloaded from: Gray's Anatomy (on 14 September 2007 07:23 PM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 14 September 2007 07:23 PM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 14 September 2007 07:23 PM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 14 September 2007 07:23 PM)
© 2007 Elsevier
Coronal plane of Sinus Cavernous
Looking from front to back
1383
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Lenticulostriate Arteries Supply the Basal Ganglia and Internal Capsule
1383
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Arterial Supply of the Thalamus and Basal Ganglia
1383
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Superficial and Deep Arterial Supply to the Cerebral Hemispheres
Coronal Plane
1383
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Superficial and Deep Arterial Supply to the Cerebral Hemisphere
Horizontal Plane
1383
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Downloaded from: Gray's Anatomy (on 14 September 2007 07:23 PM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 2 January 2007 05:39 AM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 2 January 2007 05:39 AM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 14 September 2007 07:23 PM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 14 September 2007 07:23 PM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 2 January 2007 05:39 AM)
© 2007 Elsevier
Downloaded from: Gray's Anatomy (on 2 January 2007 05:39 AM)
© 2007 Elsevier
Interrelationships of the pia mater and the
perivascular (Virchow-Robin) spaces in
the human cerebrum.
ARACHNOID VILLI AND
GRANULATIONS
• extensions of the arachnoid mater and
subarachnoid space through the wall of
dural venous sinuses.
• the major pathway for the passage of CSF
from the subarachnoid space into the
blood.
DURAL PARTITIONS
• Falx cerebri
• Tentorium cerebelli in front there is a gap, the
tentorial incisure, for passage of midbrain,
trigeminal cave
• Falx cerebelli
• Diaphragma sellae important landmark structure
in pituitary surgery
Circulation and drainage
• Most of the CSF is secreted by the
choroid plexuses in the lateral, third
and fourth ventricles.
• The total CSF volume is 125 ml. The
ventricles contain 25 ml and the
remaining 100 ml is located in the
cranial subarachnoid space.
• CSF is absorbed into the venous
system through arachnoid villi
associated with the major dural
venous sinuses, predominantly the
superior sagittal sinus.
Circulation of cerebrospinal
fluid
interventricular foramina
CSF drains from lateral ventricle
mesencephalic aqueduct
fourth ventricle
third ventricle
median and two lateral apertures
subarachnoid space arachnoid granulations superior sagittal sinus
vein
positions of the principal
subarachnoid cisterns
• cisterna magna or
cerebellomedullary cistern
• pontine cistern
• interpeduncular cistern
• cistern of the lateral fossa
• cistern of the great cerebral
vein (cisterna ambiens or
superior cistern)
• prechiasmatic and
postchiasmatic cistern
• cistern of the lamina
terminalis
• supracallosal cistern