Central Nervous System Peripheral Nervous System (Brain and Spinal Cord) (Nerves and Ganglia)

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Central Nervous System Peripheral Nervous System (Brain and Spinal Cord) (Nerves and Ganglia)

Transcript of Central Nervous System Peripheral Nervous System (Brain and Spinal Cord) (Nerves and Ganglia)

Page 1: Central Nervous System Peripheral Nervous System (Brain and Spinal Cord) (Nerves and Ganglia)

Central Nervous System

Peripheral Nervous System

(Brain and Spinal Cord)

(Nerves and Ganglia)

Page 2: Central Nervous System Peripheral Nervous System (Brain and Spinal Cord) (Nerves and Ganglia)

Peripheral Nervous System

• Somatic N.S. • Autonomic N.S.

Parasympathetic

Division

Sympathetic

Division

Skeletal

Muscle

Cardiac, Smooth Muscle and Glands

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Somatic Nervous System (SNS)

Effector Tissue1. Skeletal muscle

Autonomic Nervous System (ANS)

Two motor neurons to many effector tissues:

Effector Tissue1. Cardiac muscle2. Smooth muscle3. Glands

One motor neuron to a single effector tissue:CNS

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Somatic Nervous System (SNS)

One Motor Neuron to Single Effector Tissue

Effector Tissue is Skeletal Muscle

Neurotransmitter is ACh (released from somatic motor neurons)

Control is Voluntary (except reflexes)

Receptors are Nicotinic (response is always excitatory)

skeletalmuscle

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Somatic Motor Pathway

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Autonomic Nervous System (ANS)

Two Motor Neurons to Many Effector Tissues

Effector Tissue is Cardiac and Smooth Muscle and Glands

Neurotransmitters are ACh and NE (released from autonomic neurons)

Control is Involuntary (except biofeedback)

Receptors are Nicotinic and Muscarinic

1. cardiac2. smooth3. glands

Receptors are Nicotinic, Alpha () and Beta ()

Parasympathetic:

Sympathetic:

Preganglionic fibers myelinated; postganglionic are non-myelinated

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Effector Tissue PARA SYMHeartPupils    

Bronchioles    

Lacrimal Glands    

Salivary Glands    

Digestive Activity    

Adrenal Gland    

Blood Vessels

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Autonomic PathwaysSomatic


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