Upload
doreen-ellis
View
240
Download
0
Embed Size (px)
Citation preview
POSTERIOR TRIANGLE OF NECK
STEVEN J. ZEHREN, PH.D.
BOUNDARIES OF POSTERIOR TRIANGLE
STERNOCLEIDOMASTOID MUSCLE (SCM)
Sternal head
Clavicular head
Mastoid process
TORTICOLLIS
TRAPEZIUS MUSCLE
XI
STERNOCLEIDOMASTOID M.
TRAPEZIUS M.
SKELETAL MOTOR --- TO STERNOCLEIDOMASTOID & TRAPEZIUS MUSCLES
XI. SPINAL ACCESSORY N.
ROOFOF POSTERIOR TRIANGLE
Platysma m.
Investing layer ofdeep cervical fascia
FLOOROF POSTERIOR TRIANGLE
Splenius capitis m.
Levator scapulae m.
Post., mid., & ant.scalene mm.
Muscles of floor
MUSCLES OF FLOOR OF POSTERIOR TRIANGLE
FASCIAL FLOOR OF POSTERIOR TRIANGLE
Prevertebral layerof deep cervical fascia
SPLENIUS CAPITIS MUSCLE
LEVATOR SCAPULAE MUSCLE
INNERVATION OF LEVATOR SCAPULAE M.
Anterior scalene m.Middle scalene m.
Posterior scalene m.
SCALENE MUSCLES
Rib 1
MUSCLES PRODUCING MOVEMENT OF THE CERVICAL INTERVERTEBRAL JOINTS
VENTRAL RAMI:
INNERVATION OF PREVETEBRAL AND SCALENE MUSCLES
CONTENTSOF POSTERIOR TRIANGLE
OMOHYOID MUSCLE
OMOHYOID MUSCLE
Omohyoid m. (inferior belly)
Omohyoid (superior belly)
OCCIPITAL AND OMOCLAVICULAR TRIANGLES
Occipital triangle
Omoclavicular triangle(supraclavicular triangle)(subclavian triangle)
NERVES
CAREFREE & CAREFUL ZONES
CAREFREE & CAREFUL ZONES
Accessory N. (XI)
F. magnum Jugular f.
C2 spinal n.
C3 spinal n.C4 spinal n.
Acessory n. (XI)
Sternocleidomastoid m.
Trapezius m.
Efferent fibersAfferent fibers
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
BRACHIAL PLEXUS IN RELATIONSHIP TO CLAVICLE
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
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
VESSELS
ARTERIES IN POSTERIOR TRIANGLE
1 3
ARTERIES IN POSTERIOR TRIANGLE
TRANSVERSE CERVICAL A.
SUPRASCAPULAR A.
THYROCERVICAL TRUNK
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.
INTERSCALENE TRIANGLE
Anterior scalene m.Middle scalene m.
Brachial plexus
Subclavian a.
BOUNDARIES & CONTENTS OF THE INTERSCALENE TRIANGLE
Rib 1
Anterior scalene m.
Middle scalene m.
Cervical ribcompressessubclavian a.
Lowest trunk of brachial plexuselevated by cervical rib
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
SUBCLAVIAN VEIN PUNCTURE
Cervical pleura
CERVICAL PLEURA (CUPULA)
DEEP FASCIAE OF NECK
Investing fascia
Prevertebral fascia
Carotid sheath
Pretracheal fascia *
Buccopharyngeal fascia *
Common carotid a.Internal jugular v.Vagus n.
* = Component of visceral fascia
Retropharyngeal space
Buccopharyngeal fascia
Prevertebral fascia
Retropharyngeal space
Base of skull
Mediastinum