Human Anatomy Dissection 15 (part 1 of 2) Brain

Adherent Dura Mater -
Middle meningeal Artery and Groove in the cavarium
Smooth transition from the dura of spinal cord to the brain
Dura is adherent to the Superior Saggital Sinus -

• Veins from the brain to the superior Sagital Sinnus hold the Dura in Place
• Between the 2 hemispheres the septum of the Falx Cerebrei keep the hemispheres in place
• Falx Cerebri extends from anterior to superior
• Meets the Tentorium Cerebrei at right angles
• Rests between the Occipital Lobe and the Cerebellum
• At the foramen Magnum there is a Cistern with a large resevoir of Arachnoid
• Vetebral artery - that may be asymetrical (one smaller than the other) - pierces the Dura - Relatively Large
• Removal of the dorsal root exposes the CN XI rootlets from spinal cord that extend up through the foramen Magnum - 

CSF pressure keeps the arachnoid against the Dura

• as CN XI heads towards the jugular foramen - it meets CN X and Glossopharingeal Nerve
• Cranial (Sup and anterior ) to the Jugular Foramen there are 2 Nerves - CN VII and CN VIII (auditory and Vastibular Nerve) -  
• Anterior to the CNXI ther stump of the Vertebral Artery
• Multiple Fibers of the XII Hypoglossal Nerve through the Hypoglossal Canal
• Foramen for the CN VI 
• CN V
• CNIV - in the dural sleeve of the 
• Internal Corotids are inferior to the circle of Willis
• The Pituitary stalk is between the internal corotids
• Cribiform plate for CNI
• Arterial Supply - Circle of Willis
• Basilary Artery
• Medial Cerebral Arteries
• Anterior Cerebral Arteries
• Dura and its reflections and Sinuses
• Superior Sagital Sinus to the posteror Area - Confluence to the Transverse Sinus then down the Sigmoid Sinus to the Right and Left Jugular Foramen
• Falx Cerebrei - Stabilise the Brain
• Horizontal Tentorum Cerebri
• Streight Sinus at junction of the Falx and the Tentorium
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