Transcript Posterior Triangle of Neck

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