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Anatomy project


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Anatomy project

  1. 1. Muscular Triangle Ansa Cervicalis Carotid Triangle
  2. 2. Muscular triangle Boundaries • Anteriorly: midline of neck • Superiorly: superior belly of omohyoid. • Inferiorly: anterior border of sternomastoid .
  3. 3. Contents • Sternohyoid muscle • Sternothyroid muscle • Thyrohyoid muscle
  4. 4. Sternohyoid • Origin :Back of manubrium & medial end of clavicle. • Insertion :Medial part of the lower border of hyoid bone. • Nerve supply : Ansa Cervicalis • Action: Depression of hyoid bone
  5. 5. Sternothyroid • Origin :Back of manubrium sterni. • Insertion: Oblique line of thyroid cartilage. • Nerve supply : Ansa cervicalis. • Action :Depression of the larynx.
  6. 6. Thyrohyoid • Origin: Oblique line of the thyroid cartilage. • Insertion :Lower border of hyoid bone. • Nerve supply :hypoglossal nerve(C1fibers). • Action:Depression of hyoid or elevation of larynx.
  7. 7. Ansa Cervicalis Def It is a loop of cervical nerves which lies on the surface of carotid sheath. It is formed by the union of: • Descending hypoglossi :consist of fibers from C1. • Descending cervicalis : consist of fibers from C2&C3 Branches: • Sternohyoid • Sternothyroid • Omohyoid(both belies)
  8. 8. Ansa cervicalis
  9. 9. Carotid Triangle Boundaries • Superiorly(A) Posterior belly of digastric muscle. • Inferiorly(C) Superior belly of omohyoid. • Posteriorly(B) Anterior border of sternomastoid.
  10. 10. Roof: • Skin &superficial fascia • Platysma & deep fascia Floor: •Thyrohyoid •Hyoglossus •Middle& Inferior constrictors of the pharynx.
  11. 11. Contents: 1- Internal jagular vein: descends vertically in the lateral part of the triangle 2-common & internal carotid triangle: both lie medial to the internal jagular vein 3-external carotid artery: it gives 8 branches, 5 of them are given off in the triangle ( superior thyriod, ascending pharyngeal, lingual, facial, occipital) 4-vagus: it descends within the carotid sheath
  12. 12. 5- Cervical part of the sympathetic trunk: Lies behind the carotid sheath 6-Accessory nerve: runs downwards and backwards either superficial or deep to the internal jagular vein. 7- Hypoglossal nerve: descends between internal jagular vein and internal carotid artery. cross the external carotid artery and the loop of the lingual artery.
  13. 13. 8- Deep cervical lymph nodes: lie along the carotid sheath 9-Ansa cervicalis 10-Common facial vein
  14. 14. Thank You
  15. 15. ‫الطالب‬ ‫عمل‬: 220-‫بقا‬ ‫احمد‬ ‫يوسف‬ ‫بشرى‬ 221-‫لبيب‬ ‫مجدي‬ ‫بيترايهاب‬ 222-‫توما‬ ‫لبيب‬ ‫كمال‬ ‫بيشوي‬ 223-‫طير‬ ‫أبو‬ ‫قنديل‬ ‫الحليم‬ ‫عبد‬ ‫ابراهيم‬ ‫تسنيم‬ 224-‫الجندي‬ ‫خليل‬ ‫احمد‬ ‫مصطفى‬ ‫احمد‬ ‫تسنيم‬ 225-‫الفتاح‬ ‫عبد‬ ‫محمد‬ ‫محمود‬ ‫تسنيم‬ 226-‫الهادي‬ ‫عبد‬ ‫عطيه‬ ‫ابراهيم‬ ‫تقى‬ 227-‫الزيات‬ ‫جاد‬ ‫السيد‬ ‫تقى‬ 228-‫شعيب‬ ‫سعد‬ ‫القادر‬ ‫عبد‬ ‫خالد‬ ‫تقى‬ 229-‫الفيومي‬ ‫صابر‬ ‫محمد‬ ‫تقى‬ 230-‫عبده‬ ‫فوزي‬ ‫جمعة‬ ‫تهاني‬