NEURO ANATOMY RECAP
Layers of the meninges from outer most to inner most.
D – Dura matter
A – Arachnoid matter
P – Pia matter. Has direct contact with the brain.
Sub arachnoid space is found between the pia and arachnoid matter.
The Subarachnoid Space
❖ Space between the pia matter and arachnoid matter.
❖ Houses the CSF
❖ Has expanded areas called subarachnoid cisterns.
❖ Continuous with the fourth ventricle via paired lateral apertures
& median apertures.
❖ Arachnoid matter is composed of trabeculae that suspends into
the subarachnoid space. Serve to maintain structural stability of
the brain.
The Dura Venous Sinuses
❖ Are venous channels that are sandwiched between the layers of
dura matter
❖ It’s the main pathway by which blood from the brain enters
circulation via Internal Jugular Vein
❖ Paired sinuses
❖ Unpaired sinuses
, Paired dural venous sinuses (7)
Unpaired dural venous sinuses (5)
The – Transverse sinus
SOSI
Curious – Cavernous sinus
Sagittal – superior & inferior
Giant – Greater petrosal
Occipital
Lion – Lesser petrosal Straight
Spotted - Sphenoparietal Intercavernous
Some - Sigmoid ❖ Confluence of sinuses (TOSS) (transverse,
occipital, straight, superiorsagital)
Bears - Basilar
Layers of the meninges from outer most to inner most.
D – Dura matter
A – Arachnoid matter
P – Pia matter. Has direct contact with the brain.
Sub arachnoid space is found between the pia and arachnoid matter.
The Subarachnoid Space
❖ Space between the pia matter and arachnoid matter.
❖ Houses the CSF
❖ Has expanded areas called subarachnoid cisterns.
❖ Continuous with the fourth ventricle via paired lateral apertures
& median apertures.
❖ Arachnoid matter is composed of trabeculae that suspends into
the subarachnoid space. Serve to maintain structural stability of
the brain.
The Dura Venous Sinuses
❖ Are venous channels that are sandwiched between the layers of
dura matter
❖ It’s the main pathway by which blood from the brain enters
circulation via Internal Jugular Vein
❖ Paired sinuses
❖ Unpaired sinuses
, Paired dural venous sinuses (7)
Unpaired dural venous sinuses (5)
The – Transverse sinus
SOSI
Curious – Cavernous sinus
Sagittal – superior & inferior
Giant – Greater petrosal
Occipital
Lion – Lesser petrosal Straight
Spotted - Sphenoparietal Intercavernous
Some - Sigmoid ❖ Confluence of sinuses (TOSS) (transverse,
occipital, straight, superiorsagital)
Bears - Basilar
