Protection of the Brain

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Brain tissue sensitivity to pain

Brain tissue insensitive to pain
Headache is likely to be caused by _________________ from changes in the meninges and vascular changes

Activation of nociceptors
What causes of headaches were given in class?
- Loss of CSF
- Inflammation
- Stretching of the dura
Pain from migraines is caused by…

Vasodilation and stretching of vessels
_________________ is a vertical sheet of dura between hemispheres

Falx cerebri
_________________ is a horizontal sheet of dura between cerebrum and cerebellum

Tentorium
What is the aqueducts of sylvius?

Cerebral aqueduct
What is the foramina of Magendie?

Drains CSF from fourth ventricle
List the pathway of CSF starting from choroid plexus

Choroid plexus --> lateral ventricles --> foramina of Monro --> third ventricle --> cerebral aqueduct --> fourth ventricle --> foramina of Magendie and Luschka --> cerebellum and spinal cord --> cerebral cortex --> superior sagittal sinus
What is the function of arachnoid villi?

Reabsorbs CSF from subarachnoid space into superior sagittal sinus (and prevents backflow)
Function of CSF
- Makes brain weigh less
- Removes brain metabolites
_________________ states an increase in volume of brain tissue, blood, CSF or other brain fluids will produce an increase in intracranial pressure because the bony calvarium fixes the total cranial volume

Monro-Kellie doctrine
Which is more common vasogenic or cytotoxic brain edema?

Vasogenic edema
What causes vasogenic edema?

Increased permeability of brain capillary endothelial cells which leads to increased volume of ECF
What is cytotoxic edema?

Injured neurons, glia, or endothelial cells swell
What causes cytotoxic edema?

Hypoxia from asphyxia or ischemia
What are the three ways to produce hydrocephalus?
- Oversecretion of CSF
- Impaired absorption of CSF
- Obstruction of CSF pathways

Author

stepha998

343498

Card Set

Protection of the Brain

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ATSU

Updated

2018-11-10T04:13:23Z

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