CNS Sequence CNS Histology March 8, 2010

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

65-2 Lumbar Spinal Cord, H&E Dura mater D.R.G. Spinal Cord Myelinated nerves

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

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

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

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 Cortex

#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

Hippocampal Formation Posterior View Lateral View

#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 ganglion cells Seminal vesicle

Sensory and Autonomic Neurons (DRG) (Parasympathetic)