chapter8a Neurons Cellular and Network Properties 1

chapter8a Neurons Cellular and Network Properties 1 -...

Info iconThis preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 8a Neurons: Cellular and Network Properties
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
About this Chapter Organization of Nervous System Cells of the nervous system Electrical signals in neurons Cell-to-cell communication in the nervous system Integration of neural information transfer
Background image of page 2
Anatomically : Central: Brain Spinal Cord Peripheral: Nerves Receptors Ganglia Physiologically : Afferent (Sensory) receptors Efferent (Motor) somatic autonomic Sympathetic Parasympathetic
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
Figure 8-1 Organization of the Nervous System
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The Neuron
Background image of page 6
Figure 8-2 Model Neuron Dendrites receive incoming signals; axons carry outgoing information Dendrites Cell body Nucleus Axon hillock Axon (initial segment) Myelin sheath Synapse Presynaptic axon terminal Postsynaptic neuron Synaptic cleft Postsynaptic dendrite Integration Output signal Input signal
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Figure 8-3a-b Anatomic and Functional Categories of Neurons Neurons can be classified according to function or structure Dendrites Axon Schwann cell Somatic senses Pseudounipolar Bipolar Sensory neurons Neurons for smell and vision (a) (b) Neurons can be categorized by the number of processes and function
Background image of page 8
Figure 8-3c-d Anatomic and Functional Categories of Neurons Dendrites Axon Axon Anaxonic Multipolar Interneurons of CNS (c) (d)
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Anatomic and Functional Categories of Neurons Figure 8-3e Dendrites Axon Multipolar Efferent neuron (e) Axon terminal
Background image of page 10
Figure 8-5b (1 of 2) Cells of NS: Glial Cells and Their Functions Glial cells provide physical and biochemical support for neurons. GLIAL CELLS are found in contains forms Peripheral nervous system Myelin sheaths Schwann cells Neurotrophic factors Satellite cells Support cell bodies secrete (b) Glial cells and their functions
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Cells of NS: Glial Cells and Their Functions Figure 8-5b (2 of 2) GLIAL CELLS forms contains are found in Central nervous system Astrocytes Oligodendrocytes Microglia (modified immune cells) provide help form secrete take up create Scavengers K+, water, neurotransmitters Neurotrophic factors Blood- brain barrier Substrates for ATP production Ependymal cells Barriers between compartments Source of neural stem cells act as Myelin sheaths (b) Glial cells and their functions
Background image of page 12
Amyotrophic Lateral sclerosis (ALS ALS has been linked to a mutation on the gene coding for superoxide dismutase. Microglia use reactive oxygen
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 14
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/03/2012 for the course BIO 308 taught by Professor Acbrown during the Spring '10 term at Portland.

Page1 / 51

chapter8a Neurons Cellular and Network Properties 1 -...

This preview shows document pages 1 - 14. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online