CNS protection Flashcards
Learn about the protection methods the central nervous system (brain & spinal cord) has. (20 cards)
Layers of CNS protection
Scalp, skull bones & vertebrae, meninges
Meninges
Layers of connective tissue covering the brain (membranes)
Meninges location
Locating between bone (skull) and soft tissue
The layers of protection (specific)
Skin, Periosteum, Bone, Dura mater, Arachnoid, Pia mater
Pia mater
thin, permeable, and adheres directly to the brain surface
Arachnoid mater
web-like middle layer of meninges
Dura mater
thickest, outermost layer
What issues can arise with meninges issues
CTE and TBI
Meningites
Bacterial or viral inflammation of the meninges. +(vaccine available) but can lead to death
Meningites symptoms
fever, stiff neck, photosensitive, vomiting and rash
Cerebrospinal fluid
colorless fluid similar to blood plasma but without proteins (surrounds brain and spinal cord)
Production of cerebrospinal fluid
Produced and circulated within a series of cavities called ventricles
Drainage of cerebrospinal fluid
Eventually drains out into a space between the arachnoid and pia mater
Cerebrospinal fluid function
Delivers oxygen, nutrients, and electrolytes to the brain +cushions brain
Subdural Hematoma
Bleeding within the brain, puts pressure on the brain and can be life threatening
Paraplegia
Impairs lower extremities
Quadriplegia
Impairs all four extremities
Carotid arteries function
delivers blood throughout the brain
Blood-brain barrier
blocks most substances because epithelial cells have tight junctions preventing the diffusion of most substances (exceptions: alcohol & nicotine).
What are the four main types of carotid arteries?
Internal, external, common, and carotid arteries
