12-1 Subdivisions of Nervous System Copyright The McGraw-Hill Companies, Inc. Permission required...

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12-1 Subdivisions of Nervous System Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Brain Nerves Ganglia Peripheral nervous system (PNS) Central nervous system (CNS) Spinal cord Figure 12.1

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13-3 Spinal Nerve Roots and Plexuses Figure Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Transcript of 12-1 Subdivisions of Nervous System Copyright The McGraw-Hill Companies, Inc. Permission required...

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12-1

Subdivisions of Nervous SystemCopyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Brain

Nerves

Ganglia

Peripheral nervoussystem (PNS)

Central nervoussystem (CNS)

Spinalcord

Figure 12.1

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31 Pair of Spinal Nerves

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13-3

Spinal Nerve Roots and Plexuses

Figure 13.10

Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.

Cervical nerves (8 pairs)

Thoracic nerves (12 pairs)

Lumbar nerves (5 pairs)

Sacral nerves (5 pairs)

Coccygeal nerves (1 pair)

C2C3C4C5C6C7C8T1T2T3

T4T5

T6T7T8

T9

T10

L2

L3

L4

L5

S1

S2

S3S4S5

Cervical plexus (C1–C5)

Brachial plexus (C5–T1)

Lumbar plexus (L1–L4)

Sacral plexus (L4–S4)

Sciatic nerve

Intercostal (thoracic)nerves (T1–T12)

T11

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Cervical Plexus

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Cervical Plexus – Phrenic Nerve

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Brachial Plexus

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Thoracic Nerves – No Plexus

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Lumbar Plexus

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13-9

Lumbar vs Sacral Plexus

Figure 13.17

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Hip bone

Sacrum

Pudendal nerve

Femoral nerve

Sciatic nerveFemur

Common fibular nerve

TibiaFibula

Superficial fibular nerve

Deep fibular nerve

Medial plantar nerveLateral plantar nerve

Tibial nerve

Anterior view

Posterior view

From lumbar plexus

From sacral plexusTibial nerve

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Sacral Plexuses

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