PERIPHERAL NERVE SYSTEM

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• PERIPHERAL NERVE SYSTEM
• 1. Spinal ganglia
• 2. Peripheral nerve
• 3. Nerve endings
• 4. Spinal cord
• 5. Meninges

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NERVE ENDINGS

• NERVE ENDINGS
• SENSORY (receptors)
• A. Disposition 1. Interoceptors
• 2. Proprioceptors
• 3. Exteroceptors
• B. Feelings 1. Pain
• 2. Pressure
• 3. Temperature
• C. Structure 1. Simple (free)
• 2. Compound (nonfree) encapsulated,
  noncapsulated
• SYNAPSES (chemical and electric)
• Structure
• Functions excitatory, inhibiting
• Mediator acetylcholine, adrenalin, bombesin
• III. EFFECTORY (effectors)
• Motor
• Secretory

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Peripheral nerve
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Nerve
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Spinal ganglion
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NERVE ENDINGS

• SENSORY (receptors)
• A. Disposition 1. Interoceptors
• 2. Proprioceptors
• 3. Exteroceptors
• B. Feelings 1. Pain
• 2. Pressure
• 3. Temperature
• C. Structure 1. Simple (free)
• 2. Compound (nonfree) encapsulated,
  noncapsulated
• SYNAPSES (chemical and electric)
• Structure
• Functions excitatory, inhibiting
• Mediator acetylcholine, adrenalin, bombesin
• EFFECTORY (effectors)
• Motor
• Secretory

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Paccinian body
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Synapses
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(No Transcript)
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Spinal cord
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SPINAL CORD

• Gray matter H-like inside, nerve cells
  aggregations (nuclei)
• White matter outside, columns of nerve fibers
• Types of nerve cells
• Radicular axons form the anterior root
• Funicular axons form the white matter funiculi
• Inner axons lie in gray matter
• Ventral horn of gray matter
• 5 nuclei multipolar motor radicular neurons
• Lateral horn
• Nucleus intremediolateralis multipolar
  associative radicular neurons
• Nucleus intremediomedialis multipolar
  associative funicular neurons
• Dorsal horn
• Nucleus proprius multipolar associative
  funicular neurons

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MENINGES

• 3 protective coats of CNS dura, arachnoid and
  pia
• Skull bone
• Periosteum of skull
• epidural space
• DURA MATER dense connective tissue
• epithelium
• subdural space
• ARACHNOID flat epithelium
• fibrocollagenous tissue
• web-like strands
• subarachnoid space
• PIA MATER squamous epithelium
• loose connective tissue with
  blood vessels and nerve fibers
• Basement membrane
• Glia limitans (astrocytes)
• Nerve tissue