Lab 5 - Palate, Oral Cavity, Larynx Flashcards
Which muscle is labeled by #1?
What is its action?
Aryepiglottic muscle
Pulls the epiglottis posteriorly to help close the larynx - opposes the thyroepiglottic muscle
(Restricts the opening like a purse string, but doesn’t close it completely)
Which structure is labeled by #5?
What is its action?
Cricothyroid muscle
Phonation - Tilts the thyroid forward to tense the vocal cords -> higher pitches
Innervated by the external laryngeal nerve
Which structure is labeled by #7?
Hypoglossal nerve (CN XII)
- Inferior to the lingual and glossopharyngeal nerves
- Lingual from CN V3, labeled #2 here
- Glossopharyngeal CN IX, labled #4 here
The only pre-ganglionic sympathetic that joins a branch of the trigeminal nerve joins the ___________ nerve and then synapses in the ___________ ganglion
The only pre-ganglionic sympathetic that joins a branch of the trigeminal nerve joins the mandibular** nerve and then synapses in the **submandibular ganglion
Which structure is labeled by #7?
Cricothyroid ligament
Which structure is labeled by #7?
Cricoid cartilage
(Also #9)
Which nerve and artery are labeled by #1?
Greater palatine nerve and artery
(Extends anteriorly, vs. lesser palatine which extend posteriorly)
Which muscle abducts the vocal cords to open the airway?
5 - posterior cricoarytenoid
Which muscle is labeled by #2?
What is its function?
Genioglossus
-
Protrude the tonuge
- The only muscle that protrudes the tongue!
- Deviate the tongue to the opposite side
- Depress the tongue
Which structure is labeled by #7?
Internal carotid artery
(Also #10)
Which structure is labeled by #3?
Geniohyoid
Which structure is labeled by #13?
Epiglottis
What structures serve as the posterior boundary of the oral cavity?
Sulcus terminalis (#4)
Palatoglossal arches (#5)
Which structure is labeled by #4?
Levator palati
(aka levator palatini)
Which structure is labeled by #8?
Apex of the tongue
Which structure is labeled by #9?
Cricoid cartilage
(Also #7)
Which structure is labeled by #6?
Eustachian tube
(Also #9)
Which structure is labeled by #3?
Lateral cricoarytenoid muscles
(Adduct/close the vocal cords)
Which structure is labeled by #3?
Styloglossus muscle
Which structure is labeled by #5?
What is its action?
Posterior cricoarytenoid muscle
Abducts vocal cords -> opens airway
Which muscle is labeled by #3?
What is its function?
Hyoglossus
Retract the tongue
Which structure is labeled by #6?
What is its action?
Recurrent laryngeal nerve
- Motor innervation to laryngeal muscles except cricothyroid muscle
- Visceral sensory below vocal cords
(Internal laryngeal nerve is visceral sensory above vocal cords, external laryngeal is motor to the cricothyroid muscle)
Which structures are labeled by #6?
Deep lingual artery and vein
Which fold is labeled by #2?
Vestibular fold (aka false vocal fold)
Which structure is labeled by #4?
What is its action?
Posterior cricoarytenoid
Abducts (opens) the vocal cords
Which structure is labeled by #10?
Inferior pharyngeal constrictor
(Can tell because it attaches to the thyroid and cricothyroid cartilages)
Which muscle is labeled by #3?
Posterior cricoarytenoid
Which structure is labeled by #8?
(Bone and part)
Inferior horn of the thyroid cartilage
Which structure is labeled by #2?
What is its function?
Lateral cricoarytenoid muscle
Adducts vocal cords -> shortening and relaxation -> higher pitch
Which structure is labeled by #8?
Lingual artery
Branch of external carotid
Which structure is labeled by #4?
What does it innervate?
Recurrent laryngeal nerve
Visceral sensory to the larynx below the vocal cords
Which structure is labeled by #4?
Hyoid bone
Which structure is labeled by #5?
Pterygoid process
(Medial and lateral pterygoid plates)
Which space is labeled by #5?
Ventricle
The space between the vestibular/false vocal fold (#2) and the vocal/true vocal fold (#3)
Which structure is labeled by #6?
Cricoid cartilage
Which structure is labeled by #3?
Lingual nerve
(Branch of mandibular nerve, CN V3)
Which fold is labeled by #1?
Aryepiglottic fold
Which structure is labeled by #9?
Submandibular duct
Which structure is labeled by #1?
Muscular process of arytenoid cartilage
The attachment points for the lateral and posterior cricoarytenoid muscles
Which structure is labeled by #1?
(Bone and part)
Lesser horn of the hyoid bone
Which structure is labeled by #2?
(Bone and part)
Lesser horn of the hyoid
Which structure is labeled by #5?
Uvula
Which structure is labeled by #8?
Middle thyroid vein
Which structure is labeled by #7?
Anterior lingual gland
Which structure is labeled by #4?
Glossopharyngeal nerve (CN IX)
- As far as the tonuge goes, CN IX will provide taste to the posterior 1/3 of the tongue
- Deep and lateral to the styloglossus muscle (#3 in this image)
Which structure is labeled by #8?
Palatopharyngeal arch
Overlies the palatopharyngeal muscle
Which structure is labeled by #4?
Cricoid cartilage
Which structure is labeled by #3?
What is its action?
Transverse arytenoid
Abducts (closes) the vocal cords - not active during whisper
Which structure is labeled by #7?
Palatopharyngeal fold ovlerlying the palatopharyngeal muscle
Note - the palatoglossal pharyngeal fold/musle is anterior (#1)
Which structure is labeled by #5?
Lingual nerve
Spirals under the submandibular duct
The hypoglossal nerve enters the tongue deeper and more posteriorly to innervate the tongue muscles
Which structure is labeled by #1?
What is its function?
Thyroarytenoid muscle
Shortens and adducts the vocal folds
Which structure is labeled by #2?
Thyrohyoid muscle
Which structure is labeled by #5?
(Cartilage and part)
Laryngeal prominence of the thyroid cartilage
Which structure is labeled by #6?
Palatine tonsil
Which structure is labeled by #9?
Thyroid cartilage
Which structure is labeled by #12?
Piriform recess
(Food might get stuck here - it is an artifact of the convexity of the cricoid cartilage)
Which structure is labeled by #11?
Superior laryngeal artery and vein
Which structure is labeled by #6?
Thyroarytenoid muscle
(Pulls the thyroid cartilage back and up to put slack in the vocal cords and lower the pitch of the voice)
Which structure is labeled by #1?
Hyoid bone
Which structure is labeled by #10?
Hyoid bone
Which structure is labeled by #4?
(Cartilage and part)
Superior horn of thyroid cartilage
Which structure is labeled by #6?
Which nerves come together here?
Submandibular ganglion
- Lingual nerve - branch of CN V3, labeled #2 here
- Corda tympani - branch of CN VII
- Taste to anterior 2/3 of tongue, parasympathetics
- Sympathetic branches
What goes through the foramen labeled by #9?
Internal laryngeal nerve, superior laryngeal artery, and vein
The internal laryngeal nerve is the branch of the superior laryngeal nerve that provides visceral sensory information to the larynx above the vocal cords