Histology of NT 0708 P

8/8/2019 Histology of NT 0708 P

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Histology of nervous tissue


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Able to

identify the neurons recognize and identify the specific neurones * in the cerebrum

in the cerebellum

in the spinal cord

in the ganglia recognize and identify the glial cells

recognize and identify the special types of glialcells

satellite / capsular cells in the ganglia Schwann cells in peripheral nerves


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Oligodendrocytes

Astrocytes

Ependymal cells

Microglial cells

connective tissue and blood vessels

Nervous tissue

Schwann cells

Capsular cells / satellite cells

supporting cells (glial cells )nerve cells ( neurone )


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nerve cells ( neurone )

Gray mater

cell body

cerebrum

spinal cord

cerebellum

axon

ganglia


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cell bodies of the neurons can be observed in the gray matter

?DRG / prevertebral / paravertebral / terminal ganglia

ganglia


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cell body spherical or polyhedral

cell ( processes )

with central nucleus,nucleoli

Nissl substance in

cytoplasm


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Note:-

- neurone

- huge cell body,

- prominent nucleus & nucleoli

- basophilic granular cytoplasm

- the presence of processes

( dendrites, axon )- neuroglial cells


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Gray mater

cell body

cerebrum


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cerebrum ( N 1) characteristic feature- presence of sulci and gyri

peripheral gray matter (cellular) central white matter (less cellular)gray matter - cell bodies of nerve cells, their processes, supporting cells, synapseswhite matter - nerve fibres, axons

identify the neurones in gray matter

*


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Slide N 1 W


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fibres

pyramidal cells

small cells

pyramidal cells

fusiform cells

small cells

Cerebrum / neocortex


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Slide N 1


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Slide N 1


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Pyramidal cells of cerebral cortex

Slide N 1


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Gray mater

cell body

cerebellum

characteristic folia ( naked eye )


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cerebellum ( N 7 )

- gray matter 3 layers1) outer molecular layer

( stellate/ basket cells )

2) middle Purkinje cell layer one layeredflask shaped cell with dendrites going into

molecular layer, axons going into granular

layer

3) granular layer with granular cells

- white matter


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Slide N 2 - 7

W

piamatter

1

2

3


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1

2

3

Slide N 7


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Slide N 2 - 7

W1

23


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Slide N 2 - 7


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Slide N 2 - 7


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Slide N 7


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Purkinje cells of cerebellar cortex

note :- characteristic flask shaped cell body

small single axon ( A )

finely branching dendritic tree ( D )

Silver impregnation method


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Gray mater

cell body

spinal cord


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Slide N3 11 12 13

posterior median sulcus

anterior median fissure

peripheral white matter

H-shaped central gray matter

central canal


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W

G

anterior

posterior


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Slide N3 11 12 13


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Slide N3 11 12 13


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Ganglion Spinal ganglion

Sympathetic ganglion

Parasympathetic ganglion


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Slide N 5

Spinal ganglia ( DRG )

pseudiunipolar cell

cell bodies (huge central nu & nucleolus)

surrounded by satellite cells


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Slide N 5

aggregated cell bodies

widely separated by nerve fibres


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Slide N 5

cell bodies

satellite cells

Note:-

Rounded cell bodies with capsule cells ( satellite cells )

Aggregates of cell bodies / separated by nerve fibres


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Slide N 5

unipolar neurones


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Slide N 5


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Sympathetic ganglion

Note.

cell bodies are evenly distributed.

multipolar type


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within or near the effector organ

between two layer of smooth muscles

Parasympathetic ganglia


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cell body

axon


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axon / nerve fibre most neurons have only one axon

long cylindrical process

starts from a short pyramid-shaped region, axon

hillock plasma membrane is axolemma, content is

axoplasm

myelinated axon / initial segment


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axons / peripheral nerves

myelinated, wrapped aroundby Schwann cells

node of Ranvier ( discontinuity

between adjoining Schwann

cells )

nonmyelinated, embedded in

Schwann cells

Histology of NT 0708 P

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