Table of Contents. Lessons 1. Nervous System Go Go 2. Diseases and Disorders Go Go

Table of Contents

Nervous System

Table of Contents

Lessons1. Nervous System Go

2. Diseases and Disorders Go

Nervous SystemT

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Lesson 1– Nervous System

The nervous system is the communication network for the body.

The main function of the nervous system is to coordinate all of the body’s activities.

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Lesson 1– Neurons

Neuron, or nerve cell.

Dendrites Axons Myelin sheath.

Synapse

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Lesson 1– Types of Neurons

Afferent

Efferent

Associative

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Lesson 1– Divisions of the Nervous System

Central nervous system

Peripheral nervous system◦ autonomic nervous

system

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Lesson 1– Central Nervous System: Brain

Cerebrum Diencephalon

▫ Thalamus▫ Hypothalamus

Cerebellum

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Lesson 1– Central Nervous System: Brain (Continued)

Brain stem ▫ Midbrain▫ Pons ▫ Medulla oblongata

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Lesson 1– Central Nervous System: Spinal Cord

Controls many reflex actions

Pathway for messages to and from the brain and the nerves that go to the muscles and glands.

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Lesson 1– Central Nervous System: Protection

Brain is protected by the skull

Spinal cord is protected by the vertebrae

Meninges cover and protect the brain and spinal cord:▫ Dura mater▫ Arachnoid▫ Pia mater

Cerebrospinal fluid

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Lesson 1– Peripheral Nervous System

Cranial nerves ◦ 12 pairs and branches

Spinal nerves◦ 31 pairs and branches

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Lesson 1– Autonomic Nervous System

Autonomic nervous system controls the involuntary, or automatic, activities of the body

Sympathetic system

Parasympathetic system

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Lesson 2– Diseases and Disorders of the Nervous System

Myasthenia Gravis

Cerebrovascular Accidents

Multiple Sclerosis