MIDLINE STRUCTURES OF NECK anatomy PowerPoint

Anatomy

1. MIDLINE STRUCTURES OF NECK DR.S.R.SITA

2. EXTENT Symphysis menti to suprasternal notch Below the skin,superficial fascia and deep fascia

3. Symphysis menti Point where the two halves of the body of mandible meet in midline

4. Fibrous raphe Symphysis menti to hyoid bone Myolohoid muscles of both sides unite to form floor of the mouth( diaphragma oris )

5. Hyoid bone Horshoe shaped bone, c 3 vertebra Suspended inferior to the mandible by the stylohyoid ligament No bony articulation Attached to only muscles and ligaments Supra hyoid and infrahyoid regions

6. Median thyrohyoid ligament Midline thickening of thyrohyoid membrane which connects upper border of thyroid cartilage to upper border of hyoid bone Sub hyoid bursa separates the membrane from hyoid bone

7. Upper border of thyroid cartilage C 4 vertebra notched

8. Angle of thyroid cartilage Laryngeal prominence More prominent in adult males- ADAM’S APPLE

9. MEDIAN CRICOTHYROID LIGAMENT MIDLINE THICKENING OF CRICOTHYROID MEMBRANE – FROM UPPER BORDER OF CRICOID CARTILAGE TO LOWER BORDER OF THYROID CARTILAGE

10. CRICOID CARTILAGE LOWER BORDER OF C6 VERTEBRA STRUCTURES LOCATED AT THIS LEVEL JUNCTION OF LARYNX AND TRACHEA JUN C TION OF PHARYNX AND OESOPHAGUS ANTERIOR TUBERCLE OF C6 VETEBRA- CAROTID TUBERCLE

11. FIRST TRACHEAL RING JUST ABOVE THE ISTHUMUS OF THYROID GLAND

12. ISTHUMUS OF THYROID GLAND LIES IN FRONT OF 2,3,4 TRACHEAL RINGS

13. INFERIOR THYROID VEINS IN FRONT 5,6,7 TRACHEAL RINGS

14. THYROIDEA IMA ARTERY FROM BRACHIOCEPHALIC ARTERY ASCENDS FROM TRACHEA TO ISTHUMUS OF THYROID GLAND

15. JUGULAR VENOUS ARCH CONNECTS 2 ANTERIOR JUGULAR VEINS JUST ABOVE SUPRASTERNAL NOTCH

16. SUPRASTERNAL NOTCH BETWEEN ANTERIOR ENDS OF CLAVICLE LIES OPPOSITE THE LOWER BORDER OF T2 VERTEBRA LEFT BRACHIOCEPHALIC VEIN AND ARTERY MAY LIE IN FRONT OF TRACHEA IN THE SUPRASTERNAL NOTCH

17. SUMMARY

18. MIDLINE NECK SWELLINGS

19. TRACHEOSTOMY

20. CUT THROAT WOUNDS