Http:// world.com/practical/nervous/nervo us.htm.

http://www.histology-world.com/practical/nervous/nervous.htm

Cerebral Cortex-Histology

• How many cell layers does the cerebral cortex have?

• Can you name them?

– 1.)– 2.)– 3.)– 4.)– 5.)– 6.)

6

Molecular (plexiform)External Granular

Outer PyramidalInternal Granular

Internal PyramidalPolymorph

Layers I, II, III, Iv, V, & VI

Outer Pyamidal Layer (III)

Inner Pyamidal Layer (V)

External Granular Layer (II)

Plexiform (Molecular) Layer (I)

Internal Granular Layer (IV)

Polymorph Layer (VI)

Capsula Extrema

Capsula Externa

Gyrus

sulcus

claustum

Cerebral cortex white matter

Cerebral cortex grey matter

Cerebral Cortex pyramidal neurons

• Copyright © Floris G. Wouterlood, Ph.D.

What type of neurons are these?

Pyamidal neurons

Glia cells

nonpyamidal neurons

Layer V (Inner Pyramidal layer) Insular Cortex

Cerebellum

Cerebellum

Cerebellum molecular layer

Cerebellum- granule cell layer

Cerebellum- Purkinje cell

Cerebellum- Purkinje cell

Cerebellum- White matter

Cerebellum- Grey matter

Choroid Plexus?

Hippocampus- dentate gyrus

Hippocampus- CA1

Pineal body

pineal gland

• The pineal gland is an endocrine organ formed by cells with a neurosecretory function.

• The pineal gland is connected to the brain by a stalk, but there are no direct nerve connections of the pineal gland with the brain. Instead, postganglionic sympathetic nerve fibers derived from the superior cervical ganglia supply the pineal gland.– Preganglionic fibers to the superior cervical ganglia derive

from the lateral column of the spinal cord. The function of the pineal gland is regulated by sympathetic nerves.

pineal gland

Pineal Gland

Pituitary gland

• In this low power image of the pituitary gland, can you identify the paler staining posterior pituitary, and the darker staining anterior pituitary. The posterior pituitary is connected to the hypothalamus by the pituitary stalk

1.)

2.)

3.)

4.)

5.)

6.)

Spinal Cord: Anterior Horn

Spinal Cord: Dorsal root ganglion (drg)• vh= ventral horn; dh=dorsal hornCentral canal

Peripheral nerve

Epineurium

Endoneurium

Perineurium

Schwann cell nucleus

Axon

Node of Ranvier

Retina: Rods

Retina: Cones

Retina: Ganglion cells

Retina: Choroid

Taste Buds: Fungiform papilla

neuroepithelial cells

basal cells

Cochlea: Organ of Corti

Cochlea: Hair cells of the Organ of Corti

Crista Ampullaris

Cupula

Olfactory epithelium

Pacinian Corpuscle

Parasympathetic ganglia

Auerbach's Plexus