Cranial nerves
12 pairs of nerves that branch directly from the brain stem and transmit nerve signals to and from the eyes, ears, mouth, face and scalp.
Key Terms
Cranial nerves
12 pairs of nerves that branch directly from the brain stem and transmit nerve signals to and from the eyes, ears, mouth, face and scalp.
Meninges
A triple layer of protective tissues covering the spinal cord and brain.
Outer layer - dura mater
One of the strongest tissues of the body, s...
Cerebrospinal fluid
A clear fluid that circulates through the fibers of the arachnoid, cushions the brain when bump head
Glial cells
Cells that support and insulate nerve tissue
Neurons
Actual nerve cells
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| Term | Definition |
|---|---|
Cranial nerves | 12 pairs of nerves that branch directly from the brain stem and transmit nerve signals to and from the eyes, ears, mouth, face and scalp. |
Meninges | A triple layer of protective tissues covering the spinal cord and brain. |
Cerebrospinal fluid | A clear fluid that circulates through the fibers of the arachnoid, cushions the brain when bump head |
Glial cells | Cells that support and insulate nerve tissue |
Neurons | Actual nerve cells |
What are glial cells? | Cells that support and insulate nerve tissue. |
Ganglion | A mass of cell bodies |
Plexus | A group of ganglion forming a large nerve mass |
Nerve center | A group of cell bodies in the brain or spinal cord |
Blood-brain barrier | Tightly sealed capillary walls that protect the central nervous system from being permanently damaged every time you get sick. |
Meningitis | A disease caused by invading micro-organisms enter the nerve tissue and infect the meninges. |
Coma | A state of prolonged unconsciousness, serious brain damage can result |
Poliomyelitis | A serious disease that attacks the spinal cord. It is caused by a virus which enters the motor neurons of the spinal cord and destroys some of them. |
Nerves | Bundles of nerve fibers (axons) branching from the brain and spinal cord and connecting the central nervous system to the extremities of the body. |