Superficial Triangles/Cervical Viscera Flashcards
Submandibular Triangle
- borders
- contents
bound by inferior edge of mandible, and anterior/ posterior digastric, hyoid forms the apex
what innervates the platysma, relationship to fascia
cervical branch of the facial nerve (7), superficial to investing fascia
Muscles of submandibular triangle, their innervation, action
Zones of penetrating Trauma
-boundaries, contents
Branchial Arch Derivatives: Nerve, Muscles, Skeletal structures, Ligaments
- First
- Second
- Third
- Fourth and Sixth
Thyroid gland:
- lobes connected by what
- 50% of people have what lobe?
- Thyroglossal cysts?
Contents of the submandibular triangle
suprahyoid muscles (digastric, stylohyoid, mylohyoid, geniohyoid, and hyoglossus)
-hyoid bone, submandibular and sublingual glands, CN12, lingual nerve, submandibular ganglion, fascial A/V, marginal mandibular branch of CN 7, lingular artery, glossopharyngeal N
Carotid triangle contents, borders
Superior – posterior belly of the digastric muscle.
Lateral – medial border of the sternocleidomastoid muscle.
Inferior – superior belly of the omohyoid muscle.
contents of the root of the neck in posterior lateral triangle
contents of carotid sheath
internal jugular vein
vag nerve 10
common carotid
Branchial fistula
-what is it
branchial fistulas are persistent remnants of branchial pouches
Innervation of the SCM
CN 11, small cervical contributions from C2-C3
Posterior (lateral triangle) borders
Sixth cervical vertebra:
importance as a landmark
arch of the cricoid cartilage
the point where the vertebral artery enters the transverse foramina
External Jugular vein formed by?
- relationship to SCM, posterior triangle
- where does it drain?
Relationships of the thyroid gland:
- RLN location?
- origin of superior thyroid artery
- inferior thyroid artery origin
- lowest thyroid artery origin
know that berrys ligament is usually only 3mm anterior to RLN
Parasaggital Zone:
- Muscular triangle:
- boundaries, contents, innervation
lymphatic drainage of the thyroid
-Deep cer
relationship of inferior thyroid artery to recurrent laryngeal
Superficial Branches of the Cervical Plexus, what they innervate
(there are four)
Innervation to the Lacrimal and Submandibular and Sublingual glands
-
both parasympathetic and sympathetic.
preganglionic fibers from the superior salvatory nucleus exit brainstem with the facial nerve and travel through the chorda tympani and join with the lingual nerve before terminating in the submandibular ganglion.
-postganglionic parasympathetic fibers from the submandibular ganglion distribute as numerous short branches to the parenchyma of the gland
postganglionic sympathetic fibers come from the superior cervical ganglion and reach the gland by coursing in the external carotid and facial plexuses in the adventitia of the respective arteries.
Lateral neck dissection
layer 1,2, 3
Relationships of structures to the submandibular gland
- superficially
- supero-posteriorly
- posteriorly
- apex borders what
The submandibular salivary gland occupies most of the posterior portion of the triangle. It is a walnut-sized, C-shaped gland with superficial and deep portions. Due to its close relationship to the parotid gland, it may be involved in viral inflammations such as epidemic parotitis (mumps).
Superficially, the gland is covered by the platysma, facial vein, and marginal branch of VII. The deep portion of the gland is folded around the posterior border of the mylohyoid and wedged between the mylohyoid and the hyoglossus and genioglossus. Supero-posteriorly, the gland is grooved by the facial artery. Posteriorly, it is bordered by the posterior digastric and the stylohyoid. Apex of the gland contacts the parotid gland.
