Tongue & Mouth Flashcards
What is included in the submandibular region?
-Submandibular and sublingual glands
-Suprahyoid muscles
-Extrinsic muscles of the tongue (genioglossus, hyoglossus, styloglossus, palatoglossus)
-Lingual and Facial arteries
-Submandibular ganglion
what are the suprahyoid muscles ?
digastric, mylohyoid, geniohyoid, stylohyoid
what are the extrinsic muscles of the tongue
genioglossus, hyoglossus, styloglossus, palatoglossus
what structures can you find on the inside of the mandible?
Mylohyoid groove
Mylohyoid line
Genial Spines/tubercles
Sublingual fossa
Digastric fossae
Submandibular fossa
name the numbered structures
- Mylohyoid groove
- Mylohyoid line
- Genial spines/tubercles
name the numbered structures
- Mylohyoid line
- Submandibular fossa
- Sublingual fossa
- Digastric fossae
what connects the hyoid to the thyroid cartilage?
Thyrohyoid membrane
where does the stylohyoid attach on the hyoid?
lesser horns
Stylohyoid
Origin:
Insertion:
Innervation:
Action:
Origin: posterior lateral styloid process
Insertion: body of hyoid
Inn: CN VII
Action: elevates tongue and retracts hyoid
Anterior belly of Digastric
Origin:
Insertion:
Innervation:
Action:
Origin: digastric fossa
Insertion: interediate tendon to hyoid
Inn: mylohyoid n. (V3)
Action: Elevate hyoid and depress mandible if hyoid is fixed
Posterior belly of Digastric
Origin:
Insertion:
Innervation:
Action:
Origin: Mastoid notch
Insertion: intermediate tendon to hyoid
Inn: CN VII
Action: Elevate hyoid and depress mandible if hyoid is fixed
Mylohyoid
Origin:
Insertion:
Innervation:
Action:
Origin: mylohyoid line
Insertion: hyoid and median raphe
Inn: mylohyoid n (V3 off inf alveolar)
Action: Elevate hyoid & floor of mouth and tongue, depress mandible if hyoid is fixed
Geniohyoid
Origin:
Insertion:
Innervation:
Action:
Origin: inferior genial spine
Insertion: body of hyoid
Inn: C1 via CN XII
Action: elevate hyoid with anterior translation
Oral portion of the tongue is the ______ and the pharyngeal portion of tongue is the ________
Anterior 2/3
Posterior 1/3
what type of muscle is the tongue made up of?
skeletal muscle
what are the structures found on the tongue?
Lingual tonsil
Foramen Cecum
Sulcus terminalis
Median groove
what are the innervations of the lingual papillae?
1. Circumvallate
2. Foilate
3. Fungiform
4. Filliform
- CN IX
- Chorda tympani
- chorda tympani
- Lingual nerve branch of V3
what are the intrinsic muscles of the tongue? what are their functions>
- Superior Longitudinal: shortens tongue
- Vertical: lowers tongue
- Transverse: narrows tongue
- Inferior Longitudinal: changes shape of the tongue in mastication and deglutition
what supplies innervation and blood to the intrinsic muscles of the tongue?
Innervation: CN XII
Blood: Lingual a.
what supplies innervation to the extrinsic muscles of the tongue?
mostly CN XII, one is CN X
what are the 4 extrinsic muscles?
Genioglossus
Hyoglossus
Styloglossus
Palatoglossus
Genioglossus
Action:
Attachment:
Innervation:
Action: protrudes and depresses tongue,
Attachment: Attaches to Superior genial tubercle
Innervation: CN XII
Hyoglossus
Action:
Attachment:
Innervation:
Action: flattens and depresses tongue
Attachment: Attaches to body of greater horn of hyoid
Innervation: CN XII
Styloglossus
Action:
Attachment:
Innervation:
Action: pulls tongue posteriorly and superiorly
Attachment: Attaches to Styloid process
Innervation: CN XII
