Pharynx, soft palate, neck Flashcards
Oropharynx-
Visible in back of mouth
Pharyngopharynx-
Below(inferior to) oropharynx
Pharynx functions
Respiratory-helps breathe
Digestive-mastication
Middle ear pressure
Muscles of soft palate forms roof of..
The oropharynx and laterally with the tongue
Soft palate muscle functions-
Speaking and swallowing
Soft palate innervation-
Pharyngeal plexus,
CN- 9,10,11
Palatoglossus muscle forms:
Palatoglossal arch
2 arches
*when someone says “ahh”
Palatopharyngeus muscle action-
Palate moves posterioinferior and posterior pharyngeal wall anterosuperior.
*closes off the nasopharynx to the oral pharynx
What closes the pharynx?
The palate
Levetor veli palatini muscle location
Superior to soft palate
Lavator veli palatini action-
Elevates the soft palate to contact posterior pharyngeal wall
*so we don’t have stuff go up nose
Levetor veli palatini innervation-
Pharyngeal plexus
Tensor veli palatini is active during:
All palatine movements
*busy muscle
Tensor veli palatini actions:
Opens Eustachian tube, tenses and depresses soft palate
Tensor veli palatini innervation
Tensor veli palatini nerve-branch of V3 mandibular division.
Uvula
O:
I:
O: posterior margin of soft palate
I: counterpart of opposite side
Uvula action
Shorten and broaden the uvula
Uvula innervation
Pharyngeal plexus
Nasopharynx-
Superior to soft palate
Constrictor muscles insertions, actions, and innervations:
Superior-
Middle-
Inferior-
Insertion-median pharyngeal raphe
Action- elevate pharynx, larynx
Innervation- pharyngeal plexus
Stylopharyngeus
O:
I:
O: styloid process
I: lateral and posterior pharyngeal walls
Stylopharyngeus action
Widens and elevates pharynx
Stylopharyngeus innervation
CN 9
Hyoid muscles assist in…
Swallowing and mastication
The suprahyoid (above hyoid) group contains what 4 muscles
Digastric,
Mylohyoid,
Geniohyoid,
Stylohyoid
*all same action: elevate hyoid and depress mandible
Digastric muscle action- #1 of suprahyoids
Elevate hyoid/tarynx, depress mand
*assist in swallowing
Digastric innervation
Anterior belly-
Posterior belly-
Ant- V3
Post- 7
Mylohyoid forms: #2 of suprahyoids
The floor of the mouth
Mylohyoid
O:
I:
O: mylohyoid ridge
I: body of hyoid
Mylohyoid action-
Elevate hyoid, depress mandible, elevate tongue, assist in swallowing
Mylohyoid innervation
Mylohyoid nerve, V3
Geniohyoid
O:
I:
#3 of suprahyoids
O: genial tubercules
I: body of hyoid
Geniohyoid action
Elevate hyoid, depress mandible, assist in swallowing
Geniohyoid innervation-
1st clavical nerve
Stylohyoid- #4 suprahyoid
O:
I:
O: styloid process
I: body of hyoid
Stylohyoid action
Elevate hyoid, depress mandible, assist in swallowing
Stylohyoid innervation
Stylohyoid nerve, CN 7
Infrahyoid muscles contain what 4:
Sternothyroid,
Sternohyoid,
Omohyoid,
Thyrohyoid
*actions: bring down(depress)
Sternothyroid muscle, sternohyoid muscle, omohyoid muscle, thyrohyoid muscle:
Action-
Innervation-
*all same
Action- Depress hyoid cartilage
Innervation- 2nd and 3rd cervical nerves
Sternohyoid
Action-
Innervation-
Action- depress hyoid
Innervation- 2nd and 3rd cervical nerve
Sternocleidomastoid
Origin-
Insertion-
O: medial clavicle and superior and lateral sternum
I: mastoid process of temporal bone
*largest and most superficial muscles
Sternocleidomastoid
Action-
Innervation-
A: moves head side to side
Innervation- 11
Trapezius
O:
I:
O: occipital and posterior midline of cervical/thoracic spine
I: lateral 1/3 of clavicle/scapula
Trapezius
action-
Innervation:
A:Elevates scapula and clavicle
*shrugs shoulders
Innervation: 11