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Meninges
| Question | Answer |
|---|---|
| Through what structure does the subarachnoid space of the posterior cranial fossa communicate with the subarachnoid space of the spinal cord? | Foramen magnum |
| What structure is a crescent-shaped fold of dura mater that forms a roof over the posterior cranial fossa? | Tentorium cerebelli |
| What are the intracranial folds of the dura mater? | Cerebral falx and tentorium cerebelli |
| What structure is a sickle-shaped fold of dura mater that lies in the midline between the cerebral hemispheres? | Cerebral falx |
| What arteries provides branches to supply the periosteal dura of the anterior cranial fossa? | Anterior and posterior ethmoidal arteries, and ophthalmic artery |
| What nerves innervate the dura mater of the anterior cranial fossa? | Anterior and posterior ethmoidal nerves, and ophthalmic nerve |
| What are the three layers of the meninges? | Dura mater, arachnoid mater, and pia mater |
| What is the fold of dura mater that lies superiorly to the falx cerebelli? | Tentorium cerebelli |
| What structures of the meninges serve as sites where the CSF diffuses into the venous blood? | Arachnoid granulations |
| Epidural hematoma is an accumulation of blood in the epidural space due to an injury, such as from a road traffic accident or a sports injury. Which artery is mainly responsible for the bleeding? | Middle meningeal artery |
| What nerves innervate the dura mater of the posterior cranial fossa? | Vagus nerve and anterior rami of spinal nerves C1-C3 |
| What is the name of the the most superficial lining of the central nervous system, usually attached to the bones of the skull and therefore must also be removed by the neurosurgeon? | Dura mater |
| Computed tomography (CT) imaging of the brain reveals an acute subdural hematoma over the right convexity of the brain. What structure is overlined by the subdural space? | Arachnoid mater |
| What arteries supply blood to the periosteal dura over the middle cranial fossa? | Middle meningeal artery and posterior meningeal artery |
| What arteries supplies blood to the periosteal dura over the posterior cranial fossa? | Meningeal branches of vertebral artery, occipital artery, and posterior meningeal artery |
| What structure makes up the tela choroidea, giving rise to the choroid plexus inside of the cerebral ventricles? | Pia mater |
| Despite being commonly called “meningitis”, the more accurate term is “leptomeningitis” because the inflammation affects the “leptomeninges”. What structures are collectively called “leptomeninges”? | Arachnoid mater and pia mater |
| A large epidural hematoma is found in the left convexity of the brain. Between what structures is the hematoma located? | Skull and dura mater |
| What structure besides the skullcap does the middle meningeal artery supply? | Dura mater |
| What nerve innervates the dura mater of the middle cranial fossa? | Trigeminal nerve (CN V) |
| What nerves innervates the supratentorial part of the dura mater? | Ophthalmic nerve |
| What arteries supplies blood to the supratentorial part of the periosteal dura mater? | Middle meningeal artery |
Created by:
jofreayala
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