CNS Sequence

CNS Histology

March 9, 2009

Spinal cord

Dorsal horns: InterneuronsVentral horns: Motor neurons Lateral horns: Sympathetic neurons Parasympathetic (S2-4) neuronsDRG: Sensory (pseudounipolar) neuronsAutonomic ganglia: Post ganglionic neurons with unmyelinated axons. Sympathetic: paravertebral ganglia Parasympathetic: In organs

66a Thoracic Spinal Cord

Ventral median fissure

Dorsal horn

Lateral horn

Ventral horn

Dorsal median sulcus

66a Thoracic Spinal Cord

Neuron in Lateral Horn

Neurons in ventral Horn

#65-1N Spinal cord and DRG

Ventral horn

Lateral horn

Dorsal horn

Dorsal root ganglion (DRG)

65-1N Motor neurons, glial cells and neuropil

Glial cells

Neuropil

Dorsal root ganglion cells

Cerebrum

Sulcus (sulci) Gyrus (gyri)

Cerebellum

Pons Medulla oblongata

3rd ventricle

4th ventricle

Brain

Cerebrum and Cerebellum

76b

77

#77 Cerebellum #76b Cerebrum

W WW

CC

C

W

C: Cortex of gray matter W: White

matter

#77 Cerebellum

Cortex

White matter

#77 Cerebellum

WM

GL

ML

Purkinje neurons (cells)

#77a Cerebellar Cotex

#76 Cerebrum

Wh

ite m

atte

rW

hite

matte

r

Cortex of gray matter

#76

Ross and Pawlina, p.311

Cereb

ral cortex

Cerebellum Cerebrum

CC

W

W

Purkinje cells (neurons)

Pyramidal cells (neurons)

C: Cortex of gray matter W: White matter

#NP004N Hippocampal regionCA: Cornus ammonis

CA1

CA3

CA2

Dentate gyrusHippocamp

us

Choroid plexus

3 layers of Hippocampal region

Molecular

layer

Pyramidal cell layer

Polymorphic layer

Pyramidal cells

3 layers of Dentate gyrus

Mol

ecul

ar

laye

r

Granule cell layer (neurons)

Polymorphic layer Polymorphic layer (interneurons)

Molecular layer (dendrites of granule cells)

#74 Sympathetic ganglion cells #75 Parasympathetic ganlion cells

Seminal vesicle

Sensory and Autonomic Neurons (DRG) (Parasympatheitc)