anterior triangle Flashcards
boundaries of anterior triangle
medially sternocleidomastoid
laterally base of the mandible and superiorly line joining the angle of the mandible to mastoid process
divisions of ant triangle
submental
submandibular
carotid
muscular
submental triangle boundaries and floor is made by?
each side u have ant belly of digastric
apex is made by the chin and the base is the body of hyoid bone
the floors is made by the mylohyoid muscle joined by the mylohyoid raphe
content of submental triangle
submental lymph nodes
anterior jugular vein
submental lymph nodes drain
superficial tissues below the chin cental part of lower lip adjoining gums tip of the tongue ant part of floor of the mouth
boundaries of submandibular triangle
anteriorinferiorly: ant belly of diagastric
posteirnferotly: pst belly of diagastric
superiorly: line joining the base of the mandible with the mastoid process
superfacial fascia of submandibular triangle contents
platysma
cervical branch of facial nerve
ascending branch of transverse cutaneous nerve
roof of submandibular triangle is formed by
skin
superficial fascia
deep fascia which splits to make submandibular lymph nodes
floor of submandibular triangle is made by
hypoglossus and ,mylohyoid
ant part of submandibular triangle things superficial to the mylohyoid muscle
- submandibular salivary gland
- facial vein and submandibular lymph nodes. facial artery is deep to ir
- mylohyoid nerve and vessels
- hypoglossal nerve
- submental artery
pst part of submandibular triangle superficial content
lower part of parotid gland
and external carotid artery before entering the gland
pst part of submandibular triangle deep content
stylopharyngeus styloid process glossopharyngeal nerve styloglossus pharyngeal branch of vagus nerve a part of parotid gland
pst part of submandibular triangle deepest content
internal jugular
internal carotid
vagus nerve
boundaries of carotid triangle
anterosuperilry: pst belly of digastric
anteroinferiorly: superior belly of omohyoid
pst: sternocleidomastoid
floor of carotid triangle is made by
middle constrictor of pharynx
inferior constrictor
and thyroid membrane
arteries: carotid triangle
internal carotid common carotid external carotid with branches- ascending pharyngeal occipital labial facial and superior thyroid
veins: carotid triangle
internal jugular
common facial
pharyngeal
lingual
nerves of carotid triangle
vagus nerve superior laryngeal branch of vagus nerve which divides into internal and external laryngeal hypoglossal nerve sympathetic chain and carotid sheath with its contents
lymph nodes in carotid triangle
deep cervical
juglo omohyoid
juglo diagastric
right and left common cartoid arteries are branches of
right is a branch of brachiochephalic artery and left comes from the aortic arch
nerve innervation of carotid sinus
glossopharyngeal and sympathetic nerves
nerve innervation of carotid body and allied chemoreceptors on the arch of aorta
carotid body: glossopharyngeal and vagus and sympathetic nerves
arch of aorta chemoreceptors: vagus nerve
branches of external cartoid artery
superior thyroid ascending pharyngeal lingual facial occipital posterior auricular maxillary superficial temporal
superior thyroid artery supplies
to cricothyroid in association with external laryngeal nerve
supplies to thyroid gland
and a branch which is usperior laryngeal artery which is given to thyrohyoid with internal laryngeal nerve
also gives off branches to sternocleidomastoid branch and cricothyroid branch
cervical part of facial artery gives off
ascending palatine, tonssilar submental, glandular to submandibular salivary gland and lymph nodes
ascending palatine branch of cervical part of facial artery supplies
root of the tongue and tonsils
subemntal branch f cervical branch of facial artery supplies
supplies submental triangle and sublingual salivary gland
posterior auricular branch of cervical part of facial artery supplies
the back of the auricular, skin over mastoid process and the scalp
its stylomastoid branch enters the stylomastoid formamen and supplies the middle ear, mastoid antrum, air cells semiciruclar canal and the facial nerve
what is ansa cervicalis and it supplies what
its a loop of nerves present in the ant wall of carotid sheath and supplies the infrahyoid muscles
ansa cervicalis formation
it is formed by a superior and inferior root
superior root- desending branch of hypoglossal nerve, first cervical nerve
inferior root- from 2nd and 3rd cervical spinal nerves
distribution of superior, inferior and ansa cervicalis
superior root: supper belly of omohyoid
ansa: sternohyoid and sternothyroid
inferior toor: inferior belly of omohyoid
thyrohyoid and geniohyoid are supplied by
first cervical nerve through glossopharyngeal
