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PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing.

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Presentation on theme: "PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing."— Presentation transcript:

1 PowerPoint ® Lecture Slide Presentation by Patty Bostwick-Taylor, Florence-Darlington Technical College Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PART D 7 The Nervous System

2 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Spinal Nerves  There is a pair of spinal nerves at the level of each vertebrae  Formed by the combination of the  Named for the region from which they arise

3 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Spinal Nerves Figure 7.25a

4 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Anatomy of Spinal Nerves  Spinal nerves divide soon after leaving the spinal cord  Dorsal rami—  Ventral rami

5 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: The Spinal Nerves Figure 7.25b

6 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Spinal Nerve Plexuses Table 7.2 (1 of 2)

7 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Spinal Nerve Plexuses Table 7.2 (2 of 2)

8 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Figure 7.26a PNS: Distribution of Major Peripheral Nerves of the Upper and Lower Limbs

9 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Distribution of Major Peripheral Nerves of the Upper and Lower Limbs Figure 7.26b

10 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Distribution of Major Peripheral Nerves of the Upper and Lower Limbs Figure 7.26c

11 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Autonomic Nervous System  Motor subdivision of the PNS  Also known as the involuntary nervous system  Two subdivisions

12 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Differences Between Somatic and Autonomic Nervous Systems  Nerves  Somatic:  Autonomic:  Effector organs  Somatic:  Autonomic:

13 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Differences Between Somatic and Autonomic Nervous Systems  Neurotransmitters  Somatic:  Autonomic:

14 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Comparison of Somatic and Autonomic Nervous Systems Figure 7.27

15 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Anatomy of the Sympathetic Division  Originates from T 1 through L 2  Ganglia are at the sympathetic trunk (near the spinal cord)  Short pre-ganglionic neuron and long post- ganglionic neuron transmit impulse from CNS to the effector

16 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Figure 7.28 PNS: Anatomy of the Autonomic Nervous System

17 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Sympathetic Pathways Figure 7.29

18 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Anatomy of the Parasympathetic Division  Originates from the brain stem and S 1 through S 4  Terminal ganglia are at the effector organs  Always uses acetylcholine as a neurotransmitter

19 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Autonomic Functioning  Sympathetic—  Response to unusual stimulus  Takes over to increase activities  Remember as the “E” division

20 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings PNS: Autonomic Functioning  Parasympathetic  Conserves energy  Maintains daily necessary body functions  Remember as the “D” division

21 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Table 7.3 (1 of 2) Effects of the Sympathetic and Parasympathetic Divisions of the ANS

22 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Effects of the Sympathetic and Parasympathetic Divisions of the ANS Table 7.3 (2 of 2)

23 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Development Aspects of the Nervous System  The nervous system is formed during the first month of embryonic development  Any maternal infection can have extremely harmful effects

24 Copyright © 2009 Pearson Education, Inc., publishing as Benjamin Cummings Development Aspects of the Nervous System  No more neurons are formed after birth, but growth and maturation continues for several years


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