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

7. 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

8. UPPER BORDER OF THYROID CARTILAGE
• C 4 VERTEBRA
• NOTCHED

9. ANGLE OF THYROID CARTILAGE
• LARYNGEAL PROMINENCE
• MORE PROMINENT IN ADULT MALES-
ADAM’S APPLE

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

11. CRICOID CARTILAGE
• LOWER BORDER OF C6 VERTEBRA
• STRUCTURES LOCATED AT THIS LEVEL
1. JUNCTION OF LARYNX AND
TRACHEA
2. JUNCTION OF PHARYNX AND
OESOPHAGUS
3. ANTERIOR TUBERCLE OF C6
VETEBRA-CAROTID TUBERCLE

12. FIRST TRACHEAL RING
• JUST ABOVE THE ISTHUMUS OF
THYROID GLAND

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

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

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

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

17. 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

18. SUMMARY

19. MIDLINE NECK SWELLINGS

20. TRACHEOSTOMY

21. CUT THROAT WOUNDS