Download chapter 4 anatomy of the nervous system

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CHAPTER 4
ANATOMY OF THE NERVOUS SYSTEM
(transverse plane)
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Fig. 4-2, p. 83
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Table 4-1, p. 83
Bell-Magendie law
Spinal Column
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Fig. 4-4, p. 85
Fig. 4-1, p. 82
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Somatic Nervous System
Autonomic Nervous System
Movements initiated by the somatic motor
system are under voluntary control
Movements initiated by the autonomic
system are automatic, that is for the most
part they are not subject to voluntary
control.
All autonomic motor neurons are located
peripherally within autonomic ganglia
All somatic motor neurons are located within that lie outside the nervous system.
the central nervous system.
The autonomic motor neurons are
The efferent pathway to skeletal muscle is
activated by preganglionic neurons within
monosynaptic. The motor neurons project
the brain stem and the spinal cord.
directly to skeletal muscle.
The efferent pathway to the target is then
disynaptic.
All somatic motor neurons are excitatory, no
inhibitory signals are sent to the muscle,
rather muscle relaxation is achieved by
inhibiting the motor neuron.
In contrast autonomic targets receive both
excitatory and inhibitory signals.
Autonomic nervous system
“fight or flight” response
“vegetative” response
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GROSS ANATOMY OF THE BRAIN
 
The brain can be divided into three major divisions:
1. 
2. 
3. 
Hindbrain.
Midbrain.
Forebrain.
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Fig. 4-8, p. 88
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Cranial Nerves
(statoacoustic)
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Table 4-4, p. 88
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Fig. 4-10, p. 90
Fig. 4-8, p. 88
The Forebrain – cerebral cortex
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The Forebrain – Subcortical structures: Thalamus & Basal Ganglia
The Forebrain – Subcortical structures (Thalamus)
Fig. 4-15, p. 93
The Forebrain – Subcortical structures (Basal Ganglia)
Fig. 4-14, p. 92
The Forebrain – Subcortical structures (Limbic System)
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The Forebrain – Subcortical structures (Hypothalamus)
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Fig. 4-10, p. 90
Basal Forebrain
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Ventricles and Cerebrospinal Fluid (CSF)
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Anterior commissure
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Fig. 4-10, p. 90
Fig. 4-22, p. 98
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Fig. 4-24, p. 99
Fig. 4-23, p. 99
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Frontal Lobe
Embryonic development: 2-3 Weeks
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Fig. 5-3, p. 123
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