Anterior triangle of neck
•
81 likes•17,214 views
1) The anterior neck contains two groups of muscles - suprahyoid and infrahyoid. The suprahyoid muscles include the geniohyoid, mylohyoid, digastric and stylohyoid, while the infrahyoid muscles attach below the hyoid bone. 2) The carotid triangle contains important structures like the common carotid artery, internal and external carotid arteries, the vagus nerve (CN X), spinal accessory nerve (CN XI), and hypoglossal nerve (CN XII). The internal jugular vein also passes through this triangle. 3) The ansa cervicalis lies anterior to the carotid sheath and supplies all the infrahyoid muscles except for the thyrohy
Recommended
More Related Content
What's hot
What's hot (20)
Viewers also liked
Viewers also liked (20)
Similar to Anterior triangle of neck
Similar to Anterior triangle of neck (20)
More from Dr Laxman Khanal
More from Dr Laxman Khanal (20)
Recently uploaded
Recently uploaded (20)
Anterior triangle of neck
- 1. To MBBS 2nd year Dr. Laxman Khanal Assistant professor, department of Anatomy, BPKIHS Date:07-02-2017 Anterior Triangles of Neck
- 2. Q. Which side of SCM muscle is in action ? a. Right b. Left c. Both Q. Identify the muscle.
- 4. Compartments of neck region 1. Visceral 2. Vertebral 3. Neurovascular Cut throat wounds normally escape the injury to vessels because they become pushed back in deeper plane in voluntary extension of neck.
- 5. Subcutaneous structures of neck
- 6. •Triangular gap between the two heads of SCM is called lesser supraclavicular fossa. •It contains the terminal part of the IJV, which can be entered at this site by a needle or catheter. Nerve supply Spinal accessory nerve Branch from C2 and C3
- 7. Function of right SCM • Same side lateral flexion • Opposite head rotation
- 8. Function of Bilateral SCM
- 9. Anterior triangle of neck
- 10. Division of anterior triangle 1.Digastric triangle 2.Carotid triangle 3.Muscular triangle 4.Submental triangle Fascial sling (investing layer)
- 11. Roof Floor Room Investing layer of deep cervical fascia Muscles 1. Submental 2. Digastric 3. Muscular 4. Carotid • What forms the walls? • Who resides in the room? + Bones (H +M) Midline of neck Contents
- 13. Submental triangle •Boundaries •Floor •Contents -Submental LN -Submental vein -Ant jugular vein Triangle mostly occupied by lymph node.
- 14. Boundaries Contents -Infrahyoid muscles 1. Sternohyod and Omohyoid 2. Sternothyroid and Thyrodyoid - Thyroid gland - Trachea - Esophagus Muscular triangle With no named vessels.
- 15. Attachment of infra-hyoid muscles Omo-Hyoid/Sterno-Hyoid Thyro-Hyoid/Sterno-Thyroid # TOSS • All except T are supplied by Ansa Cervicalis (C1 to C3). • T supplied by C1 through hypoglossal nerve. Ansa Cervicalis lies in carotid triangle but supplies muscular triangle.
- 16. Suprahyoid muscles 1. Geniohyoid 2. Mylohyoid 3. Digastric 4. Stylohyoid Location-digastric and submental (suprahyoid region). Muscle of anterior neck Suprahyoid-submental and digastric Infrahyoid- muscular
- 18. Carotid triangle Boundaries Floor -Middle constrictor -Thyrohyoid membrane -Inferior constrictor Contents CCA ICA &ECA five branches of ECA Vagus nerve Sup laryngeal branch Spinal accessory nerve Hypoglossal nerve IJV Common facial vein Lingual vein Ascending pharyngeal vein CCA, IJV, 10 /11 /12 CN
- 19. Contents CCA ICA ECA Lower five branches Vagus nerve Sup laryngeal branch Spinal accessory nerve Hypoglossal nerve IJV Common facial vein Lingual vein Ascending pharyngeal vein 1. Carotid sheath 2. External CA 3. 11th CN 4. 12th CN Artery- Carotid system Vein- IJV Nerve- 10/11/12 nerve
- 20. 1. Ascending pharyngeal artery 2. Sup thyroid artery 3. Lingual artery 4. Facial artery 5. Occipital artery 6. Posterior auricular artery 7. Maxillary artery 8. Superficial temporal artery Ext carotid artery Sup belly of omohyoid Post belly of digastic SCM 1. Anterior 2. Posterior 3. Medial 4. Terminal
- 21. Carotid sinus Syndrome NTS Sudden rotation of head Tight collar IXth CNXth CN • Decrease BP • Bradycardia • Vasodilation Pressure Sympathetic Heart Vessels Rare cause of Syncope or sudden death
- 22. Artery- Carotid system Vein- IJV Nerve- 10/11/12 nerve T O S S
- 23. Digastric triangle Boundaries Floor -Mylohyoid -Hyoglosus -Midle constrictor Contents Anterior part 1. Superficial to mylohyoid 2. Superficial to hyoglossus Posterior parts
- 24. Contents Anterior part 1. Superficial to mylohyoid 2. Superficial to hyoglossus Posterior parts Imp Qns What are the strs superficial to mylohyoid ? What are the strs superficial to hyoglossus ?
- 25. Posterior part of Digastric triangle Lower part of parotid ECA ICA IJV Vagus nerve
- 26. Superficial to mylohyoid 1. Superficial part of submandibular gland (facial artery and vein) 1. Submental artery 2. Mylohyoid Nerve 3. Mylohyoid vessels
- 27. Relationship of Hyoglossus muscle • Deep part of SM gland • Duct of SM gland • SM ganglion • Lingual nerve • Hypoglossal nerve • Vena comitantes • Stylohyoid ligament • IX th nerve • Lingual artery
- 28. Superficial to Hyoglossus • Deep part of submandibular gland • Submandibular duct • Hypoglossal and Lingual nerve • Submandimular ganglion • Styloglossus muscle
- 29. ????? • Anterior neck contains two groups of muscles. 1. Supra hyoid 2. Infra hyoid • Carotid system, IJV and CN (X, XI & XII) pass through carotid triangle. • Ansa cervicalis lies anterior to carotid sheath and supplies infrahyoid muscles except Thyrohyoid.