Anatomy Bones and Muscles · MU Pleven

208. Trigonum acroticum.

Covers the carotid triangle, a paired neck space lying in front of the sternocleidomastoid and its boundaries cranially, laterally and caudally. It then lists what lies inside the carotid sheath, in order of position, followed by the structures outside it, such as the external carotid branches and surrounding veins and nerves. A short clinical section notes its use for examining and surgically approaching the carotid arteries.

Inside: 2 sections · 3 labelled pictures · 7 flashcards · 2 min

Topic 207 of 236 in the MU Pleven syllabus for Anatomy Bones and Muscles (Medicine, Year 2). The free AceMed note covers it in 2 sections, about 266 words (2 min of reading), with 7 flashcards.

In this note

  1. CAROTED TRIANGLE
  2. Clinical notes

CAROTED TRIANGLE

The carotid triangle is a paired space situated ventral to the sternocleidomastoid. The branches of the external carotid artery and structures inside the carotid sheath (common carotid artery, internal jugular vein, vagus nerve and superior root of deep ansa cervicalis) are located in this region. This space continues cranially to the parapharyngeal space and caudally to the scalenovertebral triangle.

Boundaries

  1. 1 Cranially: digastric – posterior belly
  2. 2 Laterally: sternocleidomastoid
  3. 3 Caudally: omohyoid – superior belly

Content

Inside the carotid sheath

  1. 1 Common carotid artery – situated medially – continues as the internal carotid artery from the C4 level upward
  2. 2 Internal jugular vein – situated laterally
  3. 3 Superior root of deep ansa cervicalis – situated ventrally
  4. 4 Vagus nerve – situated dorsally

Outside the carotid sheath

  1. 5 External carotid artery
  2. 5.1 Superior thyroid artery
  • – the first branch
  • – runs caudally to the omotracheal triangle
  1. 5.2 Lingual artery
  • – the second branch
  • – runs cranially to the submandibular triangle
  1. 5.3 Facial artery
  • – the third branch
  • – runs cranially to the submandibular triangle
  1. 6 Veins – facial vein, retromandibular vein, lingual vein, superior thyroid vein
  2. 7 Arch of hypoglossal nerve (arcus nervi hypoglossi)
  3. 8 Sympathetic trunk and superior cervical ganglion
  4. 9 Accessory nerve
  5. 10 Lateral group of the deep cervical lymph nodes

Continue reading free

The whole note, all 2 sections, is free with an AceMed account, with its 7 flashcards. Premium adds flashcard recall, highlights and Ask AI.

Start freeAlready a member? Open the note