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16 Cards in this Set

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  • Back
brain
major portion of the central nervous system.
cerebrum
largest portion of the brain, divided into left and right hemispheres. The cerebrum controls the skeletal muscles, interprets general senses (such as termperature, pain, and touch), and contains centers for sight and hearing. Intellect, memory, and emotional reactions also take place in the cerebrum.
ventricles
spaces within the brain that contain a fluid called the cerebrospinal fluid. The cerebrospinal fluid flows through the subarachnoid space around the brain and spinal cord.
cerebellum
located under the posterior portion of the cerebrum. Its function is to assist in the coordination of skeletal muscles and to maintain balance. (hindbrain)
brainstem
stemlike portion of the brain that connects with the spinal cord. Ten of the 12 cranial nerves originate in the brainstem.
pons
literally means bridge. It connects the cerebellum and brainstem.
medulla oblangota
located between the pons and spinal cord. It contains centers that control respiration, heart rate, and the muscles in the blood vessel walls, which assist in determining blood pressure.
midbrain
most superior portion of the brainstem.
cerebrospinal fluid (CSF)
clear, colorless fluid contained in the ventricles that flows through the subarchnoid space around the brain and spinal cord. It cushions the brain and spinal cord from shock, transports nutrients, and clears metabolic waste.
spinal cord
passes through the vertebral canal extending from the medulla oblongata to the level of the second lumbar vertebra. The spinal cord connects nerve impulses to and from the brain and initiates reflex action to sensory information without input from the brain.
meninges
three layers of membrane that cover the brain and spinal cord.
dura mater
tough outer layer of the meninges
arachnoid
delicate middle layer of the meninges. The arachnoid membrane is loosely attached to the pia mater by weblike fibers, which allow for the subarachnoid space.
pia mater
thin inner layer of the meninges.
nerve
cordlike layers of membrane that cover the brain and spinal cord.
ganglion (pl. ganglia)
group of nerve cell bodies located outside the central nervous system.