Floor of the Mouth Anatomy Quiz

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Questions and Answers

Which nerve is responsible for sensory innervation of the hard palate?

Maxillary nerve

Greater palatine nerve (correct)

Nasopalatine nerve (correct)

Lesser palatine nerve

What is the primary blood supply to the soft palate?

Lingual artery

Maxillary artery

Lesser palatine arteries (correct)

Greater palatine artery

Which muscle action is primarily associated with the soft palate?

Tenses the hard palate

Depresses the tongue

Raises the uvula (correct)

Elevates the mandible

Which of the following arteries supplies blood to the hard palate?

Greater palatine artery Signup and view all the answers

What type of epithelium primarily lines the hard palate?

Stratified squamous epithelium Signup and view all the answers

What is a characteristic appearance of the hard palate?

Pink in appearance Signup and view all the answers

What is the firmness characteristic of the medial portion of the hard palate?

Firm and rigid Signup and view all the answers

Which of the following features is NOT associated with the hard palate?

Lingual Frenulum Signup and view all the answers

What impact can smoking have on the appearance of the hard palate?

It can lead to Smokers Keratosis Signup and view all the answers

What does a cleft palate potentially influence regarding treatment?

It may require specific appliances Signup and view all the answers

What describes the lateral portions of the hard palate?

More cushioned feeling Signup and view all the answers

Which condition is characterized by potential changes in the texture and color of the hard palate?

Denture Stomatitis Signup and view all the answers

Which symptom can be associated with Kaposi Sarcoma affecting the hard palate?

Dark lesions Signup and view all the answers

What is the primary action of the hyoglossus muscle?

Depresses and retracts the tongue Signup and view all the answers

Which nerve is responsible for the nerve supply of the geniohyoid muscle?

Hypoglossal nerve Signup and view all the answers

Which of the following arteries supplies blood to the hyoglossus muscle?

Lingual artery Signup and view all the answers

What structure would you NOT find in the floor of the mouth (FOM)?

Hard palate Signup and view all the answers

What is the primary function of the geniohyoid muscle?

Elevates the hyoid bone Signup and view all the answers

Which of the following nerves is NOT associated with the floor of the mouth?

Glossoharyngeal nerve Signup and view all the answers

Which duct is associated with the submandibular salivary gland?

Wharton's duct Signup and view all the answers

Which of the following features is part of the floor of the mouth?

Ventral surface of the tongue Signup and view all the answers

What is the clinical appearance of the floor of the mouth?

Reddish-pink and shiny Signup and view all the answers

Which muscle does NOT support the floor of the mouth?

Sternohyoid Signup and view all the answers

Which of the following best describes the function of the mylohyoid muscle?

Elevates the floor of the mouth and hyoid bone Signup and view all the answers

What does the histopathology of the floor of the mouth primarily involve?

Vascular integrity and epithelial structure Signup and view all the answers

What are the key features associated with the palate?

Includes both hard and soft palate structures Signup and view all the answers

Which of the following is NOT a characteristic of the floor of the mouth?

Hard and rigid Signup and view all the answers

Which nerve is primarily responsible for the innervation of the floor of the mouth?

Trigeminal nerve Signup and view all the answers

What is the primary action of the geniohyoid muscle?

Elevates the hyoid bone Signup and view all the answers

What is a characteristic appearance of the soft palate?

Deeper pink with possible yellowish tint Signup and view all the answers

Which structure is located at the posterior pillar of the fauces?

Palatopharyngeal arch Signup and view all the answers

What is a potential change to the soft palate that can occur due to smoking?

Decreased moisture Signup and view all the answers

What does the compressible and elastic nature of the soft palate enable?

Normal swallowing and speech function Signup and view all the answers

Which condition could potentially lead to noticeable changes in the soft palate's appearance?

Candida Albicans infection Signup and view all the answers

Study Notes

Floor of the Mouth (FOM)

Clinical appearance:
- Reddish-pink in appearance
- Vascular blue in areas of veins
- Shiny and moist
- Compressible
Muscle support:
- Mylohyoid:
  - Origin: Mylohyoid line on the medial surface of the mandible
  - Insertion: Anterior surface of the body of the hyoid bone
  - Action: Elevates the FOM and hyoid bone, assists in depressing the mandible
  - Nerve Supply: Trigeminal nerve (mylohyoid branch)
  - Blood Supply: Inferior alveolar, sublingual & submental arteries
- Hyoglossus
  - Origin: Superior border of the greater cornu of the hyoid bone
  - Insertion: Lateral borders of the tongue
  - Action: Depresses and retracts the tongue
  - Nerve Supply: Hyoglossal nerve
  - Blood Supply: Lingual Artery
- Geniohyoid:
  - Origin: Inferior genial tubercle (mental spine) on the lingual surface of the mandible at the midline
  - Insertion: Body of the hyoid bone
  - Action: Elevates the hyoid bone, shortens the FOM and widens the pharynx
  - Nerve Supply: Hypoglassal Nerve
  - Blood Supply: Lingual artery (sublingual branch)
Features of the FOM:
- Lingual frenum
- Sublingual papillae (and sublingual folds)
- Mandibular Tori
- Ventral surface of the tongue
- Whartons duct (submandibular salivary glands)
- Bartholins duct and Rivinus ducts (sublingual salivary glands)
- Floor of the mouth minor salivary glands

The Palate

Hard Palate:
- Clinical appearance:
  - Pink in appearance
  - Immobile and firm
  - More cushioned feeling towards the lateral portions
  - Firmer feeling towards the medial portion
- Features:
  - Incisive papilla
  - Palatine rugae
  - Median palatine raphe
  - Palatal torus
- Changes in appearance:
  - Color
  - Texture
  - Impact on function
Soft Palate:
- Clinical Appearance:
  - Deeper pink in appearance (might also be slightly yellowish)
  - Moist
  - Compressible and elastic
- Features:
  - Uvula
  - Pillars of the fauces:
    - Anterior pillar = palatoglossal arch
    - Posterior pillar = palatopharyngeal arch
  - Tonsillar fossa
  - Pterygomandibular fold

Nerve innervation and blood supply of the palate

Nerve innervation:
- Sensory innervation: Maxillary nerve (branch of the trigeminal nerve V)
  - Hard palate: Greater palatine and nasopalatine nerves
  - Soft palate: Lesser palatine nerve
Blood Supply:
- Hard palate: Greater palatine artery
- Soft palate: Lesser palatine arteries

Summary of Palate and FOM

FOM:
- Clinical appearance: Reddish-pink, vascular blue, shiny and moist
- Histology:
  - Type of mucosa: Stratified squamous epithelium, non-keratinized
  - Epithelium: Stratified squamous epithelium, non-keratinized
  - Lamina propria: Dense connective tissue
  - Submucosa: Loose connective tissue
Hard Palate:
- Clinical appearance: Pink, immobile and firm
- Histology:
  - Type of mucosa: Stratified squamous epithelium, keratinized
  - Epithelium: Stratified squamous epithelium, keratinized
  - Lamina propria: Dense connective tissue
  - Submucosa: Dense connective tissue
Soft Palate:
- Clinical appearance: Deeper pink, moist, compressible and elastic
- Histology:
  - Type of mucosa: Stratified squamous epithelium, non-keratinized
  - Epithelium: Stratified squamous epithelium, non-keratinized
  - Lamina propria: Loose connective tissue
  - Submucosa: Loose connective tissue

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Description

Test your knowledge on the clinical appearance and muscle support of the floor of the mouth. This quiz covers the mylohyoid, hyoglossus, and geniohyoid muscles along with their origins, insertions, nerve supplies, and blood supplies. Perfect for medical students or dental professionals.