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Nervous System

Central Nervous System (CNS)

The central nervous system (CNS) consists of: the brain & spinal cord immersed in cerebrospinal fluid (CSF).
The brain consists of: the cerebrum, cerebellum, & brain stem.
The cerebrum is divided into: 2 hemispheres: left & right.
Each hemisphere of the cerebrum contains: 4 lobes: frontal, parietal, occipital, & temporal.
The outer layer of the brain is: the cerebral cortex (grey matter).
The tissue covered by the cerebral cortex (grey matter) containing mostly axons is: the diencephalon (white matter).
Corpus callosum is: the mass of white matter that connects the left & right hemispheres of the cerebrum.
Basal ganglia is: a group of specialized clusters of grey matter that assist in coordination.
Functions of the cortex (cerebral cortex): Consciousness, emotions, memory, & language. Includes all activity that occurs in cerebrum after sensory signals are recieved.
Drugs that effect the cerebral cortex include: caffeine, nicotine, cocaine, & amphetamines.
The brainstem is the control center for: vital survival functions.
The Brainstem is divided into what three parts? the midbrain, the pons, & the medulla oblongata.
The cerebellum coordinates: balance, posture, & movement.
The vestibular apparatus is important for: spatial orientation (our senses of equilibrium).
How many ventricles are there? four.
The ventricles provide: cushioning/protection for the brain & nerves.
The ventricles circulate: cerebrospinal fluid (CSF) through the brain & spinal cord.
The meninges are what? the three membranes surrounding the brain & spinal cord.
The dura mater is: the outer most layer of meninges.
The arachnoid mater is: the cobweb-like, middle layer of meninges containing many blood vessels.
The pia mater is: the thin, innermost layer of the meninges adhering directly to the brain & spinal cord.
The epidural space is: between the skull & dura mater.
The subdural space is: between dura mater & arachnoid mater.
The subarachnoid space is: between arachnoid mater & pia mater.
The spinal cord begins: at the base of the medulla oblongata.
The spinal cord ends at: approximately L1/L2.
There are how many pairs of spinal nerves (that connect the brain & spinal cord to the rest of the body)? thirty-one
How many cervical pairs (of spinal nerves)? eight.
How many thoracic pairs(of spinal nerves)? twelve.
How many lumbar pairs(of spinal nerves)? five.
How many sacral pairs(of spinal nerves)? five.
How many coccygeal pairs(of spinal nerves)? one.
The spinal cord: is the center for spinal reflexes & conducts nerve impulses.
Created by: Sonhos