POSTERIOR TRIANGLE OF NECK STEVEN J. ZEHREN, PH.D.
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Transcript of POSTERIOR TRIANGLE OF NECK STEVEN J. ZEHREN, PH.D.
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POSTERIOR TRIANGLE OF NECK
STEVEN J. ZEHREN, PH.D.
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BOUNDARIES OF POSTERIOR TRIANGLE
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STERNOCLEIDOMASTOID MUSCLE (SCM)
Sternal head
Clavicular head
Mastoid process
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TORTICOLLIS
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TRAPEZIUS MUSCLE
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XI
STERNOCLEIDOMASTOID M.TRAPEZIUS M.
SKELETAL MOTOR --- TO STERNOCLEIDOMASTOID & TRAPEZIUS MUSCLES
XI. SPINAL ACCESSORY N.
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ROOFOF POSTERIOR TRIANGLE
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Platysma m.
Investing layer ofdeep cervical fascia
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FLOOROF POSTERIOR TRIANGLE
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Splenius capitis m.
Levator scapulae m.
Post., mid., & ant.scalene mm.
Muscles of floor
MUSCLES OF FLOOR OF POSTERIOR TRIANGLE
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FASCIAL FLOOR OF POSTERIOR TRIANGLE
Prevertebral layerof deep cervical fascia
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SPLENIUS CAPITIS MUSCLE
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LEVATOR SCAPULAE MUSCLE
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INNERVATION OF LEVATOR SCAPULAE M.
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Anterior scalene m.Middle scalene m.
Posterior scalene m.
SCALENE MUSCLES
Rib 1
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MUSCLES PRODUCING MOVEMENT OF THE CERVICAL INTERVERTEBRAL JOINTS
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VENTRAL RAMI:
INNERVATION OF PREVETEBRAL AND SCALENE MUSCLES
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CONTENTSOF POSTERIOR TRIANGLE
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OMOHYOID MUSCLE
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OMOHYOID MUSCLE
Omohyoid m. (inferior belly)
Omohyoid (superior belly)
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OCCIPITAL AND OMOCLAVICULAR TRIANGLES
Occipital triangle
Omoclavicular triangle(supraclavicular triangle)(subclavian triangle)
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NERVES
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CAREFREE & CAREFUL ZONES
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CAREFREE & CAREFUL ZONES
Accessory N. (XI)
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F. magnum Jugular f.
C2 spinal n.
C3 spinal n.C4 spinal n.
Acessory n. (XI)
Sternocleidomastoid m.
Trapezius m.
Efferent fibersAfferent fibers
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5 Roots(vental rami)
3 Trunks
3 ant. Divisions3 post. Divisions
3 Cords
5 terminal Branches
Musculocutaneous n.
Axillary n.
Radial n.
Median n.
Ulnar n.
C5
C6
C7
C8
T1
“Roger Travis Drinks Cold Beer”
Superior
Middle
InferiorLateral
Posterior
Medial
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BRACHIAL PLEXUS IN RELATIONSHIP TO CLAVICLE
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Motor NervesTo Prevertebral
Muscles
ContributionsFrom C3 & C4
To XI
CutaneousNerveS
Ansa Cervicalis:
Phrenic Nerve
SUPERIOR ROOT
INFERIOR ROOT
ANSA
XIIXI
FIVE COMPONENTS OF CERVICAL PLEXUS:
C1
C2
C3
C4
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CUTANEOUS BRANCHES OF THE CERVICAL PLEXUS
Lesser occipital n. (C2,3)
Great auricular n.(C2,3)
Transverse cervical n. (C2,3)
Supraclavicular nn. (C3,4)
CERVICAL PLEXUS
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VESSELS
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ARTERIES IN POSTERIOR TRIANGLE
1 3
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ARTERIES IN POSTERIOR TRIANGLE
TRANSVERSE CERVICAL A.
SUPRASCAPULAR A.
THYROCERVICAL TRUNK
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Retromandibular v.
Superficial temporal v. Maxillary v.
Facial v.
Common facial v.(to IJV)
Posterior auricular v.
External jugular v.
Subclavian v.
EXTERNAL JUGUAR VEIN
Anterior jugular v.
Transverse cervical v.
Suprascapular v.
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INTERSCALENE TRIANGLE
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Anterior scalene m.Middle scalene m.
Brachial plexus
Subclavian a.
BOUNDARIES & CONTENTS OF THE INTERSCALENE TRIANGLE
Rib 1
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Anterior scalene m.
Middle scalene m.
Cervical ribcompressessubclavian a.
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Lowest trunk of brachial plexuselevated by cervical rib
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Ascending cervical a.
Anterior scalene m.
Phrenic n.
Inferior thyroid a.
Transverse cervical a.
Suprascapular a.
Thyrocervical trunk
Subclavian v.
ANTERIOR RELATIONSHIPS OF ANTERIOR SCALENE MUSCLE
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SUBCLAVIAN VEIN PUNCTURE
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Cervical pleura
CERVICAL PLEURA (CUPULA)
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DEEP FASCIAE OF NECK
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Investing fascia
Prevertebral fascia
Carotid sheath
Pretracheal fascia *
Buccopharyngeal fascia *
Common carotid a.Internal jugular v.Vagus n.
* = Component of visceral fascia
Retropharyngeal space
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Buccopharyngeal fascia
Prevertebral fascia
Retropharyngeal space
Base of skull
Mediastinum