The Nervous System 1The Nervous System 1
The Central nervous System
The Peripheral nervous Systemp y
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• The Central nervous SystemThe Central nervous SystemBrainSpinal cordSpinal cord
Th P i h l S• The Peripheral nervous System31 pairs of spinal nerves12 pairs of cranial nervesAutonomic part
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Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
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Dr. AlmasiAutumn 1388
Type of NervesType of Nerves
• Sensory or Afferent nervesSensory or Afferent nerves• Motor or Efferent nerves
Mi d• Mixed nerves
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S i (C )• Somatic (Common) senses: from skinpain, touch, heat, coldp , , ,
• Proprioceptive senses: from muscle and j i tjoints
Maintenence of balance and posture
• Special senses: sight, hearing, smell, taste
A t i ff t i l d• Autonomic afferents: internal organs and tissues associated with regulation of activity and i l i
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visceral pain
• Motor nerves originate from:B iBrainSpinal cordAutonomic ganglia• Motor nerves involve in:Voluntary and reflex skeletal muscle contractionInvoluntary (autonomic) smooth muscleInvoluntary (autonomic) smooth muscle
contraction and glandular secretion
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Mixed nervesMixed nerves
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NeurogliaNeuroglia
• AstrocytesAstrocytes• Oligodendrocytes (CNS)
S h C ll (PNS)• Schwann Cells (PNS) • Microglia
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Membranes covering the Brain and dSpinal cord
• Dura mater• Dura materSubdural space pEpidural / extradural (Spinal cord)• Arachnoid materSubarachnoid spaceSubarachnoid space• Pia materDr. Almasi
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Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388
Dr. AlmasiAutumn 1388