Lecture 19-Cortical Architecture

Lecture 19-Cortical Architecture - Cajal’s Neuron...

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Three main methods used to evaluate how the brain works: 1) Evaluate changes in behavior or perception when a region is lesioned or removed. Record action potentials from individual neurons when stimuli are presented to an animal or the animal is engaged in some behavior. Evaluate the types of cells, how they are arranged and how they are connected in a region of the brain. he arrangement of various types of cells in a region of the brain is alled its neuronal architecture.
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In recognition of their work on the structure of the nervous system Spain Italy A look was enough. Dumbfounded, I could not take my eyes from the microscope.
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Golgi’s reticular theory that the nervous system is a continuous syncytium where each axon fuses with other axons and thus the nervous system is in cytoplasmic continuity
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Unformatted text preview: Cajal’s Neuron Doctrine that each nerve is an individual cell Golgi stain showing cells in visual cortex The Nissl method uses basic aniline to stain RNA blue and is used to highlight important structural features of neurons. The Nissl substance (rough endoplasmic reticulum) appears dark blue due to the staining of ribosomal RNA, giving the cytoplasm a mottled appearance. Individual granules of extranuclear RNA are named Nissl granules (ribosomes). DNA present in the nucleus stains a similar color. Nissl’s stain shows extranuclear RNA, Nissl's substance, in nerve cells 2 3 4 5 6 1 Nissl Nissl Weigert 2 3 4 5 6 1 Nissl Nissl Weigert 1 2 3 4 5 6 1 2 3 4 5 6 Somatosensory cortex hand region foot region . . . . . . . . axons Cell bodies...
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This note was uploaded on 10/25/2010 for the course BIO 365R taught by Professor Draper during the Spring '08 term at University of Texas.

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Lecture 19-Cortical Architecture - Cajal’s Neuron...

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