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POSTERIOR TRIANGLE OF NECK STEVEN J. ZEHREN, PH.D.

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.

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POSTERIOR TRIANGLE OF NECK STEVEN J. ZEHREN, PH.D.

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  1. POSTERIOR TRIANGLE OF NECK STEVEN J. ZEHREN, PH.D.

  2. BOUNDARIES OF POSTERIOR TRIANGLE

  3. STERNOCLEIDOMASTOID MUSCLE (SCM) Mastoid process Sternal head Clavicular head

  4. TORTICOLLIS

  5. TRAPEZIUS MUSCLE

  6. XI. SPINAL ACCESSORY N. SKELETAL MOTOR --- TO STERNOCLEIDOMASTOID & TRAPEZIUS MUSCLES XI STERNOCLEIDOMASTOID M. TRAPEZIUS M.

  7. ROOF OF POSTERIOR TRIANGLE

  8. Investing layer of deep cervical fascia Platysma m.

  9. FLOOR OF POSTERIOR TRIANGLE

  10. MUSCLES OF FLOOR OF POSTERIOR TRIANGLE Muscles of floor Splenius capitis m. Levator scapulae m. Post., mid., & ant. scalene mm.

  11. FASCIAL FLOOR OF POSTERIOR TRIANGLE Prevertebral layer of deep cervical fascia

  12. SPLENIUS CAPITIS MUSCLE

  13. LEVATOR SCAPULAE MUSCLE

  14. INNERVATION OF LEVATOR SCAPULAE M.

  15. SCALENE MUSCLES Anterior scalene m. Middle scalene m. Posterior scalene m. Rib 1

  16. MUSCLES PRODUCING MOVEMENT OF THE CERVICAL INTERVERTEBRAL JOINTS

  17. INNERVATION OF PREVETEBRAL AND SCALENE MUSCLES VENTRAL RAMI:

  18. CONTENTS OF POSTERIOR TRIANGLE

  19. OMOHYOID MUSCLE

  20. OMOHYOID MUSCLE Omohyoid (superior belly) Omohyoid m. (inferior belly)

  21. OCCIPITAL AND OMOCLAVICULAR TRIANGLES Occipital triangle Omoclavicular triangle (supraclavicular triangle) (subclavian triangle)

  22. NERVES

  23. CAREFREE & CAREFUL ZONES

  24. CAREFREE & CAREFUL ZONES Accessory N. (XI)

  25. F. magnum Jugular f. C2 spinal n. Acessory n. (XI) Sternocleidomastoid m. C3 spinal n. C4 spinal n. Trapezius m. Efferent fibers Afferent fibers

  26. 5 Roots (vental rami) 3 Trunks 3 ant. Divisions 3 post. Divisions C5 C6 Superior 3 Cords C7 Middle C8 5 terminal Branches Inferior T1 Lateral Musculocutaneous n. Posterior Axillary n. Medial Radial n. “Roger Travis Drinks Cold Beer” Median n. Ulnar n.

  27. BRACHIAL PLEXUS IN RELATIONSHIP TO CLAVICLE

  28. FIVE COMPONENTS OF CERVICAL PLEXUS: XII XI Cutaneous NerveS C1 Motor Nerves To Prevertebral Muscles Ansa Cervicalis: C2 SUPERIOR ROOT C3 INFERIOR ROOT Contributions From C3 & C4 To XI C4 ANSA Phrenic Nerve

  29. 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)

  30. VESSELS

  31. ARTERIES IN POSTERIOR TRIANGLE 1 3

  32. ARTERIES IN POSTERIOR TRIANGLE TRANSVERSE CERVICAL A. THYROCERVICAL TRUNK SUPRASCAPULAR A.

  33. EXTERNAL JUGUAR VEIN Superficial temporal v. Maxillary v. Facial v. Posterior auricular v. Retromandibular v. Common facial v. (to IJV) External jugular v. Transverse cervical v. Suprascapular v. Anterior jugular v. Subclavian v.

  34. INTERSCALENE TRIANGLE

  35. BOUNDARIES & CONTENTS OF THE INTERSCALENE TRIANGLE Anterior scalene m. Middle scalene m. Brachial plexus Subclavian a. Rib 1

  36. Anterior scalene m. Middle scalene m. Cervical rib compresses subclavian a.

  37. Lowest trunk of brachial plexus elevated by cervical rib

  38. 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.

  39. SUBCLAVIAN VEIN PUNCTURE

  40. CERVICAL PLEURA (CUPULA) Cervical pleura

  41. DEEP FASCIAE OF NECK

  42. Investing fascia Retropharyngeal space Pretracheal fascia * Buccopharyngeal fascia * Carotid sheath Common carotid a. Internal jugular v. Vagus n. Prevertebral fascia * = Component of visceral fascia

  43. Base of skull Buccopharyngeal fascia Retropharyngeal space Prevertebral fascia Mediastinum

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