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Carotid triangle
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- 2. BOUNDARIES ANTERIORLY AND BELOW SUPERIORBELLY OF OMOHYOID
- 3. BOUNDARIES ANTERIORLY AND ABOVE POSTERIORBELLY OF DIGASTRIC AND STYLOHYOID MUSCLE
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- 5. BOUNDARIES ROOF FORMED BY INVESTINGLAYER OF DEEP CERVICAL FASCIA
- 6. BOUNDARIES FLOOR FORMED BY THYROHYOIDAND HYOGLOSSUS ANTERIORLY AND POSTERIORLY BY MIDDLE CONSTRICTOR AND INFERIOR CONSTRICTOR OF THE PHARYNX.
- 7. CONTENTS OF THECAROTID TRIANGLE 1. INTERNAL JUGULAR VEIN 2. COMMON CAROTID ARTERY 3. EXTERNAL CAROTID ARTERY 4. INTERNAL CAROTID ARTERY 5. SUPERIOR THYROID ,LINGUAL, COMMON FACIAL VEINS 6. VAGUS NERVE
- 8. CONTENTS OF THECAROTID TRIANGLE 7. SPINAL ACCESSORY NERVE 8.HYPOGLOSSAL NERVE 9. CERVICAL SYMPATHETIC CHAIN 10.ANSA CERVICALIS 11.LYMPH NODES
- 9. COMMON CAROTID ARTERY COMMONCAROTID ARTERY DIVIDES INTO EXTERNAL AND INTERNAL CAROTID ARTERY AT THE LEVEL OF UPPER BORDER OF THYROID CARTILAGE (C4 LEVEL) AT ITS TERMINATION THERE IS A BULGE CALLED CAROTID SINUS
- 10. COMMON CAROTID ARTERY BEHINDTHE TERMINATION THERE IS A SMALL GREYISH YELLOW BODY CALLED CAROTID BODY.
- 11. CAROTID SINUS IMPORTANCE PHYSIOLOGICALIMPORTANCE OF THE CAROTID SINUS IS THAT IT CONTAINS BARORECEPTORS WHEN THERE IS INCREASE IN BLOOD PRESSURE THERE IS REFLEX SLOWING OF THE HEART RATE AND PERIPHERAL VASODILATATION. CAROTID BODY CONTAINS CHEMORECEPTORS WHEN THE ARTERIAL OXYGEN TENSION FALLS THERE IS REFLEX INCREASE IN RESPIRATION
- 12. COMMON CAROTID ARTERY • BOTHTHE CAROTID SINUS AND THE CAROTID BODY ARE SUPPLIED BY GLOSSOPHARYNGEAL NERVE
- 13. EXTERNAL CAROTID ARTERY EXTERNALCAROTID ARTERY GIVES THE FOLLOWING BRANCHES IN THE CAROTID TRIANGLE 1.SUPERIOR THYROID 2.LINGUAL 3.FACIAL 4.ASCENDING PHARYNGEAL 5.OCCIPITAL
- 14. CAROTID TRIANGLE • SUPERIOR THYROID,LINGUAL,COMMON FACIAL VEINS DRAINS INTO THE INTERNAL JUGULAR VEIN IN THE TRIANGLE
- 15. VAGUS NERVE • VAGUS NERVEDESCENDS BETWEEN THE VEIN AND ARTERY WITHIN THE CAROTID SHEATH. • THE VAGUS NERVE GIVES PHARYNGEAL BRANCHES AND SUPERIOR LARYNGEAL NERVE WHICH DIVIDES INTO INTERNAL LARYNGEAL NERVE AND EXTERNAL LARYNGEAL NERVE.
- 16. • SPINAL ACCESSORY NERVERUNS BACKWARDS CROSSING THE INTERNAL JUGULAR VEIN. • HYPOGLOSSAL NERVE RUNS FORWARDS CROSSING THE INTERNAL CAROTID ,EXTERNAL CAROTID AND THE LOOP OF THE LINGUAL ARTERY.
- 17. • CERVICAL SYMPATHETIC CHAINRUNS OUTSIDE THE CAROTID SHEATH BEHIND THE ARTERY.
- 18. ANSA CERVICALIS • IS ANERVE LOOP LYING ON THE CAROTID SHEATH OVER THE INTERNAL JUGULAR VEIN .IT IS FORMED BY THE UNION OF DESCENDENS HYPOGLOSSI AND DESCENDENS CERVICALIS . • SUPERIOR ROOT ARISES FROM THE HYPOGLOSSAL NERVE. • IT CONTAINS C1 FIBRES • INFERIOR ROOT ARISES FROM APR OF C2 AND
- 19. • RIBBON MUSCLES ORINFRAHYOID MUSCLES • THE RIBBON MUSCLES ARE • STERNOHYOID • STERNOTHYROID • SUPERIOR BELLY OF OMOHYOID • INFERIOR BELLY OF OMOHYOID
- 20. LYMPH NODES • CAROTID TRIANGLEHAS DEEP CERVICAL LYMPH NODES ARE RELATED TO INTERNAL JUGULAR VEINS
- 21. CAROTID TRIANGLE THE COMMONCAROTID ARTERY DIVIDES INTO EXTERNAL CAROTID ARTERY AND INTERNAL CAROTID ARTERY, AT THE UPPER BORDER OF THYROID CARTILAGE LEVEL i.e. 4th CERVICAL VERTEBRA LEVEL.
- 22. CAROTID ARTERY FROM SUPERIORTHYROID ARTERY THE SUPERIOR LARYNGEAL ARTERY COMES OUT WHICH ALONG WITH INTERNAL LARYNGEAL NERVE PIERCES THYROHYOID MEMBRANE.
- 23. CAROTID TRIANGLE THE THREESTRUCTURES SEEN IN CAROTID TRIANGLE ARE COMMON CAROTID ARTERY, VAGUS AND INTERNAL JUGULAR VEIN. VAGUS IS SEEN BETWEEN INTERNAL JUGULAR VEIN AND COMMON CAROTID ARTERY.
- 24. IN DISSECTION WEFIND THAT ANSA CERVICALIS IS VERY SUPERFICIALLY PLACED AND IS THIN AND SUPPLIES ALL STRAP MUSCLES.
- 25. CAROTID TRIANGLE DEEP TOSTERNOHYOID MUSCLE IS STERNOTHYROID AND THYROHYOID.
- 26. BRANCHES OF SUPERIORTHYROID ARTERY 1. SUPERIOR LARYNGEAL ARTERY 2. STERNOMASTOID BRANCH 3. GLANDULAR BRANCH ( SUPPLIES THYROID GLAND) 4. INFRA HYOID BRANCH 5. CRICOTHYROID BRANCH
- 27. BRANCHES OF VAGUS 1.MENINGEAL 2.PHARYNGEAL 3. SUPERIOR LARYNGEAL 4. CARDIAC BRANCHES ( IN NECK) 5. RECURRENT LARYNGEAL
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