Spinal Cord
This major bundle of nerve fibers runs from the brain down through the center of the spine.
What is the spinal cord?
This process occurs when the inside of a cell becomes less negative as sodium ions enter the cell.
What is depolarization ?
This bony, protective stacked segments of the skeleton house and protect the spinal cord
What is the vertebrae?
The specific membrane potential threshold that must be reached for an action potential to occur.
What is -55 mV?
This is the highest region of the spine, consisting of 7 vertebrae located in the neck.
What is the cervical spine?
This process occurs when the inside of a cell becomes more negative as potassium leaves the cell.
What is hyperpolarization ?
This type of paralysis occurs when a severe spinal cord injury prevents movement in all four limbs.
What is quadriplegia (or tetraplegia)?
localized changes in membrane potential that occur in dendrites and help cell bodies decide whether to pass a signal down the axon.
What are graded potentials?
This thin, delicate innermost layer of the meninges tightly hugs the surface of the spinal cord.
What is the pia mater?
The period during repolarization that allows neurons to respond only to very strong stimulus.
What is the relative refractory period?