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Nervous System
Nervous System
34
Anatomy
Undergraduate 1
11/04/2009

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Term
Central Nervous System
Definition
Brain/Spinal Cord
Term
Peripheral Nervous System
Definition
All nerves of brain and spinal cord outside of cranial vault and spinal column.
Term
Axon Hillock
Definition
Area between cell body and Axon where the action potential is initiated.
Term
Synaptic Bulb
Definition
At end of axon, containing vesicles for neurotransmitter.
Term
10,000-30,000
Definition
Number of connections with other neurons.
Term
Glucose
Definition
Energy used by Neuron
Term
-70mv
Definition
amount of mv inside cell
Term
Charge ratio inside/outside neuron
Definition
3 Na+ outside cell for every 2 K+ inside cell.
Term
-50mv
Definition
amount of mv needed for gates to open
Term
Depolarization
Definition
When -50mv is reached, allows positive charges in cell.
Term
+20mv
Definition
Gates close, repolarization occurs,
Term
Nodes of Ranvier
Definition
Gaps in myelin sheath that make depolarization occur incrementally.
Term
Nucleus
Definition
Group of Nerve Cell Bodies in the brain
Term
Ganglia
Definition
Group of nerve cell bodies in the P.N.S.
Term
Tracts
Definition
All axons that travel within the brain and spinal cord.
Term
Nuclei
Definition
Nerve cell bodies inside the spinal cord and brain.
Term
Dura Mater
Definition
Tough Mother - outer membrane layer of brain
Term
Arachnoid Mater
Definition
Spidery Mother - Middle layer of membrane of brain
Term
Pia Mater
Definition
Tender Mother - Inner layer of membrane of brain
Term
Cerebral Spinal Fluid
Definition
Between Arachnoid and Pia layers of membrane of brain.
Term
Grey Matter
Definition
Not mylinated. Located in cerebral hemisphere.
Term
Cortex
Definition
6 Layers of Nerve Cells.
Term
Frontal Lobe
Definition
Concentration, Planning, Problem Solving, Voluntary Motor Control
Term
Parietal Lobe
Definition
Speech/Words, Primary Sensory Area
Term
Temporal Lobe
Definition
Interpretation of sensory, visual, and auditory patterns. Primary auditory area.
Term
Occipital Lobe
Definition
Visual area. Visual recognition of objects.
Term
Thalamus
Definition
"Switching Station" Relay between lower parts of brain and cerebral hemispheres. Everything converges here.
Term
Hypothalamus
Definition
Seat of Emotions/Seat of Hormones. Regulation of temperature and breathing. Autonomic nervous system.
Term
Basal Gangla
Definition
Stores action patterns.
Term
Limbic System
Definition
Use cerebral hemispheres, thalamus, and hypothalamus. Memory/Emotions. Mood disorders.
Term
Midbrain
Definition
Reptilian brain - Basic startle responses to sensory input.
Term
Pons
Definition
Communicate with cerebellum, helps with rate and depth of breathing. Swells.
Term
Medulla Oblongata
Definition
Brain Stem, Respiratory/Cardiac Control, Controls diameter of blood vessels.
Term
Cerebellum
Definition
Coordinated movement control, fine motor control. All input coming into body goes through this first. Balance/Posture.
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