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Biology 322 Human Anatomy I

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Biology 322 Human Anatomy I Peripheral Nervous System More than 20 nerves leave the brachial plexus to supply both afferent (sensory) and efferent (motor) innervation ... – PowerPoint PPT presentation

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Title: Biology 322 Human Anatomy I


1
Biology 322Human Anatomy I
  • Peripheral Nervous System

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Recall All organs are composed of, at most,
four tissues Epithelial tissue
Connective tissue
Muscle tissue Nervous tissue
Nervous tissue Excitable cells (neurons)
Nonexcitable (supporting)
cells Connective tissue Meninges - in
central nervous system
Endoneurium
Perineurium in peripheral nervous
system
Epineurium Epithelium
found only in blood vessels of PNS Muscle
(smooth)
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  • Cells of Nervous Tissue
  • Excitable cells
  • Nonexcitable cells

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Axon of neuron
Cell body of neuron
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In PNS Neuron cell bodies
Axons and dendrites
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Nerve
Outside
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Nerves originate
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Cranial Nerves
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The names, functions, origins, terminations,
foramina, and effects of damage are listed in
your text for all of the cranial nerves.
Using this information, you will be expected to
know a) The names and numbers of all 12 pairs of
cranial nerves, including the subdivisions
of cranial nerve V
b) The foramen through which each cranial nerve
passes
c) The primary functions of each cranial nerve
d) The effects of damage to each cranial nerve
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Using this information, you will be expected to
know a) The names and numbers of all 12 pairs of
cranial nerves, including the subdivisions
of cranial nerve V
b) The foramen through which each cranial nerve
passes
c) The primary functions of each cranial nerve
d) The effects of damage to each cranial nerve
Example The abducens nerve (VI) originates from
the pons and exits the skull through the superior
orbital fissure. It innervates the lateral
rectus muscle which causes the eye to rotate
laterally, so injury to this nerve on one side
causes an inability to rotate that eye laterally.
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Spinal Nerves
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Spinal Nerves - Originate
- Pass
-
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Naming Spinal Nerves
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Naming Spinal Nerves
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But
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A plexus is
1. Example
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2. Example
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We will go into greater detail about the cervical
plexus, but you will not be held responsible for
details of the cervical, lumbar, or sacral plexes
EXCEPT
You need to know which spinal nerves contribute
their ventral rami to each plexus.
You need to know which plexus gives rise to each
of the following nerves, and which area of the
body each of them innervates Common
fibular/peroneal Obturator Femoral
Phrenic
Genitofemoral
Pudendal Inferior and superior gluteal
Tibial (Sciatic)
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Summary of the Brachial Plexus
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More than 20 nerves leave the brachial plexus to
supply both afferent (sensory) and efferent
(motor) innervation to the shoulder, arm,
forearm, hand, and parts of the neck and thoracic
wall.
We will follow five of these
1.
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2.
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3.
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5.
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Cutaneous Innervation
Anterior
Posterior
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