Suprahyoid/Extrinsic Tongue Muscles (MT) Flashcards
Origin and Insertion of Digastric Anterior Belly
Origin:
Digastric Fossa of Mandible
Insertion:
Hyoid Bone via Digastric Tendon
Origin and Insertion of Digastric Posterior Belly
Origin:
Medial Aspect of Mastoid Process
Insertion:
Hyoid Bone via Digastric Tendon
Origin and Insertion of Mylohyoid
Origin:
Mylohyoid Line of Mandible
Insertion:
Hyoid bone and mylohyoid Raphe
Origin and Insertion of Geniohyoid
Origin:
Inferior Mental Spine of Mandible
Insertion:
Hyoid Bone
Origin and Insertion of Stylohyoid
Origin:
Styloid Process
Insertion:
Body of the Hyoid Bone
Innervation and Action of Digastric anterior belly
Innervation:
Mylohyoid n. (CN V3)
Action:
Lowers Mandible or raises Hyoid
Innervation and Action of Digastric posterior belly
Innervation:
CN VII
Action:
Elevates and Retracts Hyoid
Innervation and Action of Mylohyoid
Innervation:
Mylohyoid n. (CN V3)
Action:
- Supports and Elevates floor of mouth
- Raises Hyoid
Innervation and Action of geniohyoid
Innervation:
C1 branch traveling with CNXII
Action:
Draws mandible and hyoid toward each other
Innervation and Action of stylohyoid
Innervation:
CN VII
Action:
Elevates and retracts hyoid
Which of the suprahyoid muscles is innervated by CN VII?
- Muscle function?
- Posterior Belly of Digastric
- Stylohyoid
BOTH elevate and retract the hyoid
Which of the suprahyoid muscles is innervated by CN V3 (mylohyoid n.)?
- Anterior Belly of Digastric
- Mylohyoid
What is the common function of all of the suprahyoid muscles?
- Elevate they hyoid
Which muscles act to retract they hyoid?
- Stylohyoid
- Posterior belly of Digastric
Origin and Insertion of Hyoglossus
Origin:
Greater horn of the hyoid bone
Insertion:
Lateral Tongue
Origin and Insertion of Genioglossus
Origin:
Superior Mental Spine
Insertion:
Hyoid Bone, tongue
Origin and Insertion of styloglossus
Origin:
Styloid Process
Insertion:
Lateral Tongue
Origin and Insertion of Palatoglssus
Origin:
- Posterior Margin of the hard Palate
- Palatine Aponeurosis
Insertion:
Lateral Tongue
Innervation and Action of Hyoglossus
Innervation:
CN XII
Action:
Depress and Retract Tongue
Innervation and Action of Genioglossus
Innervation:
CN XII
Action:
- Protrudes
- Depresses
- Retacts tongue
Innervation and Action of Styloglossus
Innervation:
CN XII
Action:
- Retracts
- Elevates tonge
Innervation and Action of Palatoglossus
Innervation: CN X (Pharyngeal Branches)
Action:
- Depresses Palate
- Elevates back of the Tongue
What are the 5 suprahyoid muscles?
- Digastric (anterior)
- Digastric (Posterior)
- Mylohyoid
- Geniohyoid
- Stylohyoid
What are the 4 extrinsic muscles of the tongue?
- Hyoglossus
- Genioglossus
- Styloglossus
- Palatoglossus
What extrinsic tongue muscles are innervated by CN XII?
- Hyoglossus
- Genioglossus
- Styloglossus
Which of the Extrinsic tongue muscles act to depress the tongue?
- Hyoglossus
- Genioglossus
- Palatoglossus
Which extrinsic muscles of the tongue act to retract the tongue?
- Hyoglossus
- Genioglossus
- Styloglossus
**All innervated by CN XII
