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DIVISIONS OF NERVOUS SYSTEM
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PERIPHERAL N.S
- 31 PAIRS SPINAL NERVES
- 12 PAIRS CRANIAL NERVES + GANGLIA + NERVE PLEXUSES
- CONNECTIVE TISSUE SUPORT
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CENTRAL N.S
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BRAIN
- CEREBRAL HEMISPHERE AND EVERYTHING BETWEEN IT
- PONS
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MEDULLA OBLONGATA (MOST INFERIOR)
- MEDULLA RUNS CAUDALLY
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AUTONOMIC N.S
- VICERA
- INVOLUNTARY MUSCLES
- GLANDS
- LIES PARTLY IN AND PARTLY OUTSIDE CNS
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CELLS OF N.S
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NERVE CELLS INFO
- IMPULSE CONDUCTION
- FUNCTIONAL CARACTARISTICS OF NERVOUS TISSUE
- 14 THOUSAND MILLION
- NEUROGLIAL CELLS
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USUAL CELLS
- FORMS WALLS OF BLOOD VESSELS
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PARTS OF NERVE CELL
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DENDRITES
- SHORT
- BRANCH LIKE
- MAJOR PART OF RECEPTOR
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CEVERAL TYPES OF DENDRITES
- MULTIPOLAR IN SHAPE
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AXON
- MAY OR MAY NOT HAVE INSULATION
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GREY MATTER
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COMPOSSED OF:
- CELL BODIES OF NEURONS
- SURROUNDED BY TERMINALS ARRIVING FROM NERVE CELLS ELSEWHERE
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WHITE MATTER
- LONG PROCESSES
- MANY HAS MEILIN SHEATHS
- NERVE FIBRES
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NEUROGLIAL CATAGORY
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MACROGLIA
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ASTROCYTES
- REPAIRS INJURIES
- OLIGODENDROCYTES
- MICROGLIA
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FOLLOWING ASPECTS:
- INCLUDE EPENDYMAL LAYER (LINING MEMBRANE)
- FUNCTION UNCONFIRMED
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SCHWANN AND OLIGODENDROCYTES
- FORMATION OF MYELIN SHEATH
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WHITE AND GREY MATTER COMBINED
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HAS NEUROGLIAL CELLS:
- INTERSTRIAL MATERIAL OF CNS
- MAY INFLUENCE IONIC COMPOSITION OF EXTRACELLULAR FLUID SURROUNDING NERVE CELLS
- <html><img src="MIND MAP PICS/nerve_diagram.jpg">
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TERMS IN NEURO ANATOMY
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SYNAPSE
- SHERRINGTON 1897
- NO JOINNING OF CYTOPLASMS OF 2 NEURONS
- INTERFACE EXISTS
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FORMS OF SYNAPSES
- SIMPLE APPOSITION
- COMPLEX
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NERVE IMPULSE
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SURFACE
- PROPEGATED IN ANY DIRECTION
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PHYSIOLOGICAL CONDITION
- CONSTENT POLARITY AT SYNAPSE (TRANSMISSION FROM AXON TO CELL BODY OF DIFFERENT NEURON)
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NEURAXIS
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HEAD/ROSTRAL END
- ASCENDING FIBRES
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TAIL/CAUDEL END
- DESCENDING FIBRES
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GANGLION
- COLLECTION OF GREY MATTER OUTSIDE CNS
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NUCLEUS
- COLLECTION OF GRAY MATTER INSIDE CNS
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GROUP OF NERVE FIBRES TRAVELLING IN CNS
- TRACT
- BUNDLE
- FASCICULUS