1. Nerve reflex of panda---surprise
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2. Your nerve reflex---laugh
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3. 7 Nervous Tissue

4. Objective: Grasp Neuronal structures under LM
Grasp Myelinated peripheral nerve
Understand:
tactile corpuscles
lamellated corpuscles
Grasp Nissl body
Synapse
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5. REVIEW(复习)
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6. perikaryon 胞体 Neuron神经元 Axon 轴突 nervous tissue Process 突起 Dendrite 树突
Neuroglia
神经胶质细胞
Axon 轴突
Dendrite 树突
nervous tissue
Organization of nervous tisue: neuron +neuroglia: neuron consists of two part;
The soma is in the CNS
The axon exit and contacts the effector organ in the PNS, carry imformations away from the soma.→ efferent ending
The dendrites carry imformations into the soma.←afferent ending
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7. 1 LM: Basophilic particles, 2 compositoin：RER + free ribosome
尼氏体(Nissl body)：
1 LM: Basophilic particles,
2 compositoin：RER + free ribosome
3 function： active Pr synthesis : enzyme
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8. 化学性突触 ★ 1 definition： Specialized for the release and
reception of neurotransmitters.
2 compositon：under EM ：
a. Presynaptic element ： synaptic vesicles with （ Presynaptic membrane） neurotransmitters
b. Synaptic cleft ：
c. Postsynaptic element ：receptors。
（ Postsynaptic membrane ）
3 function：
transmitting impulses in one direction
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9. slides 1 Multipolar motor Neuron (spinal cord), H&E.
2 Myelinated peripheral nerve fiber
sciatic nerve (HE)
3 Tactile corpuscle and lamellated corpuscle
skin (HE)
4 Spinal ganglion HE
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10. What we should find 1 Spinal cord Multipolar neurons
( Perikaryon, nucleus, Nissl body)
2 sciatic nerve
axon, myelin sheath, node of Ranvier
neurolemma and so on
3 Skin:tactile corpuscle
lamellated corpuscle
4 spinal ganglion
Perikaryon, satellite cells
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11. How to find
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12. Cross section ：flaten round
slide 1 脊髓（ spinal cord)
Cross section ：flaten round
灰质（gray matter）: central，butterfly
白质（white matter）: peripheral
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13. Slide 2 Myelinated peripheral nerve 周围神经系统有髓神经纤维
cross section
longitudinal section
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14. NO PAINS NO GAINS

15. 中央管（Central Canal） （ependimal cells）： simple cuboidal or columnar
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16. 白质（White Matter） different sections
nuclei of neuroglia
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17. 灰质（Gray Matter） The dorsal horn (DH) 背角（后角） The ventral horn (VH)
腹侧角（前角）
The central canal (CC)
中央管
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18. The ventral horn (VH) 腹侧角（前角）
neuron：perikaryon：huge，irregular cytoplasm：Nissl bodies
nucleus： huge ，round，pale staining，clear nuclear membrane and nucleolus
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19. nucleus axon hillock 轴丘 nucleolus Soma胞体 Nissl bodies Dendrite 树突
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20. Gray Matter multipolar neuron
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21. NO PAINS NO GAINS

22. Slide 2 Myelinated peripheral nerve, H&E. 周围神经系统有髓神经纤维
cross section
longitudinal section
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23. 1) Cross section （lower power）
epineurium
perineurium
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24. 1) Cross section （high power）
Endoneurium
Axon
Myelin sheath
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25. 2) Longitudinal section （lower power）
The Nodes of Ranvier
Schwann Cells
myelin sheath
axon
fibroblast nuclei
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26. 郎飞结（Node of Ranvier）
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27. Slide 3 : Skin of the finger H&E
epidermis
dermis
hypodermis
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28. NO PAINS NO GAINS

29. (1) Tactile corpuscles 1.Where? 2.Shape? 3.Component?
In the dermal papillae
2.Shape?
Oval
Perpendicular to the surface
3.Component?
Stacked flat cells
Capsule
Never ending
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30. NO PAINS NO GAINS

31. (2) Lamellated corpuscles
Where?
hypodermis
Shape?
Large / Oval
Sliced onions
Component?
Concentric layer of CT
Central core
Never ending
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32. NO PAINS NO GAINS

33. 3) nerve bundles
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34. Slide 4 Spinal ganglion H&E,
4. Low power:
ganglion cells
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35. Spinal ganglion H&E High power:
ganglion cells
satellite cells
Within the ganglion very large cells are visible. These are the cell bodies of the neurons (Ganglion 2). Within the cell body you should be able to see the Nissl substance, an accumulation of the basophilic stain of ribosomes (Ganglion 3). The cell bodies are supported by small surrounding cells called capsule cells or amphicytes. Between this arrangement, you will find a number of bundles of axonal projections.
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36. Slide 4 Motor end plate(AgNO3)
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37. Motor end plate
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38. T e s t
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39. Which structure (pointer)?
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40. Which structure (pointer)?
Which tissue ?
Which structure (pointer)?
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41. Which structure (pointer)?
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45. Which structure (pointer)?
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47. Which structure (pointer)?
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