Dorsal (posterior) horn dorsal root entry zone intermediolateral cell column white matter gray...

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dorsal (posterior) horndorsal (posterior) horn

dorsal rootdorsal rootentry zoneentry zone

intermediolateralintermediolateralcell columncell column

white matterwhite matter

gray mattergray matter

ventral (anterior) hornventral (anterior) horn

white matterwhite matter

gray mattergray matter

motor neuronsmotor neurons

multipolarmultipolarmotor neuronmotor neuron

nucleus w/nucleus w/nucleolusnucleolus

Nissl substanceNissl substance(RNA)(RNA)

ventralventral(anterior)(anterior)

hornhorn

white matterwhite matter

gray mattergray matter

motormotorneuronsneurons

dorsal nucleusdorsal nucleus(of Clarke)(of Clarke)

dorsaldorsal(posterior)(posterior)

hornhorn

nucleus w/nucleus w/nucleolusnucleolus

Nissl substanceNissl substance(RNA)(RNA)

neuropilneuropil

nucleus w/nucleus w/nucleolusnucleolus

Nissl substanceNissl substance(RNA)(RNA)

neuropilneuropil

white matterwhite matter

gray mattergray matter

dorsaldorsal(posterior)(posterior)

hornhornwhite matterwhite matter

w

hite matter

white m

atter

molecular layermolecular layer

granule layergranule layer

blood vesselblood vessel

blood vessel

blood vessel

pia materpia mater

white m

atter

white m

atter

molecular layermolecular layer

granule layergranule layer

blood vesselblood vessel

pia materpia mater

Purkinje cellsPurkinje cells

molecular layermolecular layer

granule layergranule layer

blood vesselblood vessel

dendritesdendrites

nucleus w/nucleus w/nucleolusnucleolus Nissl substanceNissl substance

white matterwhite matter

bloodbloodvesselvessel

mol

ecul

ar la

yer

mol

ecul

ar la

yer

exte

rnal

gra

nule

laye

r

exte

rnal

gra

nule

laye

r

exte

rnal

pyr

amid

al la

yer

exte

rnal

pyr

amid

al la

yer

inte

rnal

gra

nule

laye

r

inte

rnal

gra

nule

laye

r

mul

tifor

m la

yer

mul

tifor

m la

yerin

tern

al p

yram

idal

laye

r

inte

rnal

pyr

amid

al la

yer

mol

ecul

ar la

yer

mol

ecul

ar la

yer

exte

rnal

gra

nule

laye

r

exte

rnal

gra

nule

laye

r

exte

rnal

pyr

amid

al la

yer

exte

rnal

pyr

amid

al la

yer

inte

rnal

gra

nule

laye

r

inte

rnal

gra

nule

laye

rin

tern

al p

yram

idal

laye

r

inte

rnal

pyr

amid

al la

yer

multiform layermultiform layer

white matterwhite matter

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