Transcript Chapter 13: Peripheral Nervous System

Chapter 13:
Peripheral Nervous System
Figure 13.1: Place of the PNS in the structural organization of the nervous system, p. 491.
CNS
PNS
Sensory division
Sympathetic
division
Parasympathetic
division
Human Anatomy and Physiology, 7e
by Elaine Marieb & Katja Hoehn
Motor division
Autonomic
nervous
system
Somatic
nervous
system
Copyright © 2007 Pearson Education, Inc.,
publishing as Benjamin Cummings.
Figure 13.6: Distribution of spinal nerves, p. 509.
Cervical plexus
Brachial plexus
Cervical
nerves
C1– C8
Cervical
enlargement
Intercostal
nerves
Thoracic
nerves
T1– T12
Lumbar
enlargement
Lumbar plexus
Sacral plexus
Cauda equina
Human Anatomy and Physiology, 7e
by Elaine Marieb & Katja Hoehn
Lumbar
nerves
L1– L5
Sacral
nerves
S1– S5
Coccygeal
nerve
C0
Copyright © 2007 Pearson Education, Inc.,
publishing as Benjamin Cummings.
Figure 13.12a: Dermatomes, p. 518.
C2
C3
C4
C5
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
L1 T12 L1
S2
S3
L2
L2
T2
C5
C6
C6
C7
C8
C5
C6
C8
L3
L3
L4
L4
L5
S1
T2
C6
C7
L5
S1
(a)
Human Anatomy and Physiology, 7e
by Elaine Marieb & Katja Hoehn
Copyright © 2007 Pearson Education, Inc.,
publishing as Benjamin Cummings.
Figure 13.12b: Dermatomes, p. 518.
C2
C3
C4
C5
C6
C7
C8
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
C6
C7
C8 L2
L4
C5
S1
S3S2
S4
S5
S1 S2
C6
T11
T12 C7
L1
L3 C8
L5
S2 S1
L1
L5
L2
L5
L3
L4
(b)
Human Anatomy and Physiology, 7e
by Elaine Marieb & Katja Hoehn
L4
L5
L4
L5 S1
Copyright © 2007 Pearson Education, Inc.,
publishing as Benjamin Cummings.
Marshall Hall 1790 – 1857
English physiologist who first
advanced the theory of how the
reflex arc worked.
Figure 13.14: The basic components of all human reflex arcs, p. 521.
Spinal cord (in cross section)
Stimulus
2 Sensory neuron
1 Receptor
4 Motor neuron
Skin
3 Integration center
Interneuron
5 Effector
Human Anatomy and Physiology, 7e
by Elaine Marieb & Katja Hoehn
Copyright © 2007 Pearson Education, Inc.,
publishing as Benjamin Cummings.