no pains no gains 1 nerve reflex of panda---surprise
TRANSCRIPT
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NO PAINS NO GAINS 1Nerve reflex of panda---surprise
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Your nerve reflex---laugh
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Objective: Grasp Neuronal structures under LM
Grasp Myelinated peripheral nerve
Understand:
tactile corpuscles
lamellated corpuscles
Grasp Nissl body
Synapse
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REVIEW( 复习 )
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perikaryon胞体
Process突起
Axon轴突
Dendrite树突
nervous tissue
Neuron神经元
Neuroglia神经胶质细胞
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尼氏体 (Nissl body) :1 LM: Basophilic particles,
2 compositoin : RER + free ribosome
3 function : active Pr synthesis : enzyme
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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
化学性突触 ★
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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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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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How to find
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Cross section : flaten round
灰质( gray matter ) : central , butterfly
白质( white matter ) : peripheral
slide 1 脊髓( spinal cord)
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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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中央管( Central Canal )( ependimal cells ): simple cuboidal
or columnar
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白质( White Matter ) different sections
nuclei of neuroglia
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The dorsal horn (DH) 背角(后角)
The ventral horn (VH) 腹侧角(前角)
The central canal (CC) 中央管
灰质( Gray Matter )
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neuron : perikaryon : huge , irregular cytoplasm : Nissl bodies nucleus : huge , round , pale staining , clear nuclear membrane and nucleolus
The ventral horn (VH) 腹侧角(前角)
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nucleus
Soma 胞体
Dendrite树突
axon hillock轴丘
Nissl bodies
nucleolus
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Gray Mattermultipolar neuron
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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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1) Cross section ( lower power )
perineuriumepineurium
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1) Cross section ( high power )
Axon
Myelin sheath
Endoneurium
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2) Longitudinal section( lower power )
myelin sheath
fibroblast nuclei
The Nodes of Ranvier
Schwann Cells
axon
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郎飞结( Node of Ranvier )
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Slide 3 :Skin of the finger H&E
epidermis
dermis
hypodermis
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(1) Tactile corpuscles
1.Where?In the dermal papillae
2.Shape? Oval Perpendicular to the surface
3.Component? Stacked flat cells Capsule Never ending
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(2) Lamellated corpuscles
Where?hypodermis
Shape? Large / Oval Sliced onions
Component? Concentric layer of CT
Central core Never ending
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3) nerve bundles
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Slide 4 Spinal ganglion H&E,
4. Low power:ganglion cells
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Spinal ganglion H&E High power:
satellite cells
ganglion cells
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Slide 4 Motor end plate(AgNO3)
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Motor end plate
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T e s t
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Which structure (pointer)?
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Which tissue ?
Which structure (pointer)?
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Which structure (pointer)?
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Which structure (pointer)?
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Which structure (pointer)?
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Which structure (pointer)?
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Which structure (pointer)?
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Which structure (pointer)?
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Which structure (pointer)?