THE PERIPHERAL NERVOUS SYSTEM The Spinal Nerves. 1. General Description 31 Pairs of Spinal Nerves...
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Transcript of THE PERIPHERAL NERVOUS SYSTEM The Spinal Nerves. 1. General Description 31 Pairs of Spinal Nerves...
THE PERIPHERAL THE PERIPHERAL NERVOUS SYSTEMNERVOUS SYSTEM
The Spinal NervesThe Spinal Nerves
1. General Description 31 Pairs of Spinal Nerves
Cervical Nerves : 8 pairs
Thoracic Nerves : 12 pairs
Lumbar Nerves : 5 pairs
Sacral Nerves : 5 pairs
Coccygeal Nerves : 1 pair
1. General Description 31 Pairs of Spinal Nerves
Cervical Nerves : 8 pairs
Thoracic Nerves : 12 pairs
Lumbar Nerves : 5 pairs
Sacral Nerves : 5 pairs
Coccygeal Nerves : 1 pair
Two Roots of Spinal Nerves– Anterior Root: motor fibers– Posterior Root: sensory fibers
Four Types of Fibers in Spinal Nerves– The Somatic afferent (sensory) FibersThe Somatic afferent (sensory) Fibers- The Visceral afferent (sensory) Fibers- The Visceral afferent (sensory) Fibers– The Somatic efferent (motor) FibersThe Somatic efferent (motor) Fibers- The Visceral efferent (motor) Fibers- The Visceral efferent (motor) Fibers
Four Types of Fibers in Spinal Nerves– The Somatic afferent (sensory) FibersThe Somatic afferent (sensory) Fibers- The Visceral afferent (sensory) Fibers- The Visceral afferent (sensory) Fibers– The Somatic efferent (motor) FibersThe Somatic efferent (motor) Fibers- The Visceral efferent (motor) Fibers- The Visceral efferent (motor) Fibers
Four Branches of a Spinal Nerves– Anterior Branch Posterior Branch– Meningeal Branch Communicating Branches
Four Branches of a Spinal Nerves
Four Plexuses– Cervical Plexus– Brachial Plexus– Lumbar Plexus– Sacral Plexus
The thoracic nerves
are separated from
each other.
The cervical PlexusThe cervical PlexusThe Formation of the Cervical Plexus: The anterior branches of the 1st to 4th cervical
nerves (C1~4)
• The Superficial BranchesThe Superficial Branches(( sternocleidomastoid m.)sternocleidomastoid m.)
The lesser occipital nerveThe lesser occipital nerve
The great auricular nerveThe great auricular nerve
The transverse nerve of neckThe transverse nerve of neck
The supraclavicular nervesThe supraclavicular nerves
The Deep BranchesThe Deep Branches– The phrenic nerveThe phrenic nerve
The Brachial Plexus The Brachial Plexus (scalene fissure, axilla)(scalene fissure, axilla) formation:formation: root(C5 – T1) trunk root(C5 – T1) trunk
division corddivision cord
branches and distributionbranches and distribution Brachial plexus : Brachial plexus : tthe long thoracic he long thoracic
the musculocutaneous nervethe musculocutaneous nerve
lateral cordlateral cord lateral pectoral nerve lateral pectoral nerve
the median nerve the median nerve
Medial cordMedial cord the ulnar nerve the ulnar nerve
medial pectoral nervemedial pectoral nerve
the radial nervethe radial nerve
Posterior cordPosterior cord the axillary nerve the axillary nerve
the thoracodorsal nervethe thoracodorsal nerve
the musculocutaneous n.the musculocutaneous n.
the axillary n.the axillary n. tthe long thoracic n.he long thoracic n.
medial pectoral n.medial pectoral n.
lateral pectoral n.lateral pectoral n.
median n.median n.
the ulnar n. the ulnar n. the radialthe radial n n..
the thoracodorsal n.the thoracodorsal n.
tthe long thoracic n. he long thoracic n. serratus anteriorserratus anterior
the musculocutaneous nerve anterior group of the armthe musculocutaneous nerve anterior group of the arm
lateral pectoral nerv lateral pectoral nerv the pectoralis major the pectoralis major
medial pectoral nerv medial pectoral nerv pectoralis minor pectoralis minor
the median nerve the most of anterior group of the the median nerve the most of anterior group of the
forearm and part muscles of handforearm and part muscles of hand
the ulnar nerve the part of anterior group of the the ulnar nerve the part of anterior group of the
forearm and part muscles of handforearm and part muscles of hand
the radial nervethe radial nerve posterior group of arm and posterior posterior group of arm and posterior
group of the forearmgroup of the forearm
the axillary nerve deltoidthe axillary nerve deltoid
the thoracodorsal nerve the thoracodorsal nerve latissimus dorsi latissimus dorsi
Radial NerveRadial Nerve
The Anterior Branches of the Thoracic The Anterior Branches of the Thoracic NervesNerves
————Intercostal and subcostal nerveIntercostal and subcostal nerve
The segmental distribution of the anterior branches of The segmental distribution of the anterior branches of the thoracic nervesthe thoracic nerves
T2: the sternal angle T8: the costal arch
T4: the nipple T10: the umbilicus
T6: the xiphoid processT12: the anterior superior iliac spin
The Lumbar PlexusThe Lumbar PlexusThe formation of the lumbar plexus: The formation of the lumbar plexus:
TT12 12 (part)+L(part)+L1~31~3+L+L4 4 (part)(part)
The branches of the lumbar plexusThe branches of the lumbar plexusThe iliohypogastric nerve The femoral nerveThe iliohypogastric nerve The femoral nerveThe ilioinguinal nerve The obturator nerveThe ilioinguinal nerve The obturator nerveThe lateral femoral cutaneous nerve The genitofemoral nerveThe lateral femoral cutaneous nerve The genitofemoral nerve
The Sacral PlexusThe Sacral Plexus
The formation of the sacral plexusThe formation of the sacral plexus
The lumbosacral trunk(LThe lumbosacral trunk(L4~54~5)+S)+S1~51~5+Co+Co
The branches of The branches of the sacral plexusthe sacral plexus
The branches of the sacral plexusThe branches of the sacral plexus
–The superior gluteal n.The superior gluteal n.
–The inferior gluteal n.The inferior gluteal n.
–The pudendal n.The pudendal n.
The anal nervesThe anal nerves
The perineal nerveThe perineal nerve
The dorsal nerve of The dorsal nerve of
penis or clitorispenis or clitoris
- The posterior femoral - The posterior femoral
cutaneous n.cutaneous n.
The sciatic nerveThe sciatic nerve(Poplited fossa)(Poplited fossa)
•The tibial nerveThe tibial nerve•(hook-like foot)(hook-like foot)
•The common peronealThe common peroneal
nervenerve(talipes equinovarus)(talipes equinovarus)
The superficial peronealThe superficial peroneal
nervenerve
The deep peroneal nerveThe deep peroneal nerve