Triangles Of The Neck Flashcards
Subdivisions of the anterior triangle
- Submandibular triangle
- Submental triangle
- Muscular triangle
- Carotid triangle
Subdivisions of the posterior triangle
- Occipital triangle
* Supraclavicular triangle
associated with structures such as the airway and digestive tract, and nerves and vessels that pass between the thorax and head
Ant triangle
associated with the thyroid and parathyroid glands
Ant triangle
Boundaries of the submandibular triangle
- mastoid & mandible above
- anterior belly of digastric anteriorly (abd)
- posterior belly of digastric (pbd)
- stylohyoid posteriorly (sh)
Superfical (roof) structures of the submandibular triangle
- platysma
- facial vein (fv)
- cervical branch of facial nerve (cbf)
What are the structures in the SMD triangle
- external and internal carotid artery
- internal jugular vein
- deep cervical lymph nodes
- vagus nerve
- submandibular gland
- submandibular lymph nodes
- facial artery and vein
- hypoglossal nerve
located between the two anterior digastric muscles (abd)
Submental triangle
Structures found in the SMT triangle
Submental lymph nodes - drains the floor of the mouth
Boundaries of the muscular triangle
- mid line of neck (1)
- superior belly of omohyoid (2)
- sternocleidomastoid (3)
Strap muscles w/n the superficial layer in the muscular triangle
- sternohyoid
* superior belly of omohyoid
Strap muscles w/n the deep layer in the muscular triangle
• thyrohyoid • sternothyroid
Boundaries of the carotid triangle
- posterior belly of digastric muscle
- superior belly of the omohyoid muscle
- anterior border of sternocleidomastoid muscle
Arteries in the carotid triangle
- common carotid
- external carotid
- internal carotid
- superior thyroid
- occipital
- lingual
- facial
Found on the lateral aspect of the neck in direct continuity with the upper limb; it is associated with nerves and vessels that pass into and out of the upper limbs
Post triangle
Boundaries of the post triangle
- anterior–sternocleidomastoid
- posterior–trapezius
- inferior–middle third of clavicle
Ant boundary of the post triangle
SCM
Post boundary of the post triangle
Trapezius
Inferior boundary of the post triangle
Middle third of clavicle
Roof of post triangle
- skin
- superficial fascia
- platysma inferiorly
Structures superficial to SCM
- external jugular vein (blue)
- superficial cervical lymph nodes (green)
- lesser occipital nerve (lc)
- great auricular nerve (ga)
- transverse cervical nerve (tc)
- supraclavicular nerves (sc)
- spinal accessory nerve (sa)
Other structures in the post triangle
- spinal accessory (sa)
- brachial plexus (bp)
- transverse cervical artery (tc)
- suprascapular artery (ss)
the area immediately superior to the superior thoracic aperture and axillary inlets
Root of the neck
ROTN of bounded ant by
- top of the manubrium of sternum
* superior margin of the clavicle
ROTN is bounded post by
- top of the thoracic vertebra T1
* superior margin of the scapula to the coracoid process
It divides the neck into anterior and posterior triangles
SCM
