SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL &...

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Page 1: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 2: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.

SYMPATHATIC NERVOUS SYSTEM

Dr Iram Tassaduq

Page 3: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 4: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.

AUTONOMIC NERVOUS SYSTEM

The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily

with the regulation & control of visceral functions are termed collectively the visceral,

vegetative, or autonomic nervous system

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AUTONOMIC NERVOUS SYSTEM

Innervate organs not usually under voluntary control.

Effectors include cardiac and smooth muscles and glands.

Effectors are part of visceral organs and blood vessels.

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ORGANIZATION OF ANS AFFERENT NEURONS

EFFERENT NEURONS

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Page 8: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 9: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
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SYMPATHETIC TRUNKS

Two ganglionated nerve trunks - paravertebral ganglia

Extend the whole length of vertebral column from the cranial base to the coccyx.

Joined to spinal nerves by rami communicantes.

Page 11: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 12: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 13: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 14: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.

SYMPATHETIC PART OF ANS

• Larger part

• Widely distributed

• Prepares body for emergency & stress – (fight, fright & flight)

Page 15: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.

COMPOSITION

Consists of

•Efferents

•Afferents

•Ganglia – paravertebral & prevertebral

•Plexuses

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Page 17: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.

• Communicating branches arising from thoracic and first two lumbar spinal nerves going to sympathetic ganglion

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EFFERENTS

• Cell bodies of sympathetic neurons are located in grey matter of spinal cord.

• Myelinated axons leave through anterior nerve root and than pass via white rami communicantes to paravertebral ganglia

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EFFERENT FIBERS

• Terminate in the ganglion

• Travel upward to the cervical region

• Pass through ganglion without synapsing

Page 20: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 21: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 22: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.
Page 23: SYMPATHATIC NERVOUS SYSTEM Dr Iram Tassaduq AUTONOMIC NERVOUS SYSTEM The portions of the CENTRAL & PERIPHERAL nervous system that are concerned primarily.

AFFERENTS

The afferent myelinated nerve fibers travel from the viscera through the sympathetic ganglia without synapsing.

They reach their cell bodies in the posterior root ganglion of the corresponding spinal nerve

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