CNS Sequence CNS Histology March 9, 2009

Spinal cord Dorsal horns: Interneurons Ventral horns: Motor neurons Lateral horns: Sympathetic neurons Parasympathetic (S2-4) neurons DRG: Sensory (pseudounipolar) neurons Autonomic ganglia: Post ganglionic neurons with unmyelinated axons. Sympathetic: paravertebral ganglia Parasympathetic: In organs

66a Thoracic Spinal Cord Dorsal median sulcus Dorsal horn Lateral horn Ventral horn Ventral median fissure

66a Thoracic Spinal Cord Neuron in Lateral Horn Neurons in ventral Horn

#65-1N Spinal cord and DRG Dorsal horn Lateral horn Ventral horn Dorsal root ganglion (DRG)

65-1N Motor neurons, glial cells and neuropil

Dorsal root ganglion cells

Brain Cerebrum Cerebellum 3rd ventricle 4th ventricle Pons Sulcus (sulci) Gyrus (gyri) 3rd ventricle Cerebellum 4th ventricle Pons Medulla oblongata

Cerebrum and Cerebellum 77

#77 Cerebellum #76b Cerebrum C: Cortex of gray matter W: White matter C C C W W W

#77 Cerebellum Cortex White matter

#77 Cerebellum ML GL WM Purkinje neurons (cells)

#77a Cerebellar Cotex

#76 Cerebrum White matter Cortex of gray matter

#76 Cerebral cortex Ross and Pawlina, p.311

C C Cerebellum Cerebrum W W C: Cortex of gray matter W: White matter Purkinje cells (neurons) C C Pyramidal cells (neurons) W W

#NP004N Hippocampal region CA: Cornus ammonis Choroid plexus CA2 CA3 Dentate gyrus Hippocampus CA1

3 layers of Hippocampal region Polymorphic layer Pyramidal cell layer Molecular layer Pyramidal cells

3 layers of Dentate gyrus Molecular layer Molecular layer (dendrites of granule cells) Granule cell layer (neurons) Polymorphic layer Polymorphic layer (interneurons)

#74 Sympathetic ganglion cells #75 Parasympathetic ganlion cells Seminal vesicle

Sensory and Autonomic Neurons (DRG) (Parasympatheitc)