Maxillary and Mandibular Trigeminal Nerve Quiz (ODS Learning Outcomes)

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Questions and Answers

What anatomical structure does the greater palatine nerve NOT supply?

Mucosa of the lateral wall of the nasal fossa

Mucosa of the hard palate

Palatal gingivae

Incisive papilla (correct)

Which of the following nerves is responsible for innervating the skin of the lower face?

Maxillary nerve

Nasopalatine nerve

Infra-orbital nerve

Mental nerve (correct)

Which muscle is supplied by the medial pterygoid nerve?

Lateral pterygoid

Medial pterygoid (correct)

Temporalis

Masseter

What is the primary action of the lateral pterygoid muscle?

Depress the mandible Signup and view all the answers

What is the function of the nasopalatine nerve?

Supplies the oral mucosa around the incisive papilla Signup and view all the answers

Which branch of the trigeminal nerve is involved in supplying the maxillary teeth?

Maxillary nerve Signup and view all the answers

Which of the following structures does NOT receive sensory innervation from the mandibular branch of the trigeminal nerve?

Lateral wall of the nasal fossa Signup and view all the answers

What is the main role of the inferior alveolar nerve in dentistry?

Provides sensation to the mandibular molars Signup and view all the answers

Which branch of the trigeminal nerve leaves through foramen ovale?

Mandibular nerve Signup and view all the answers

What is the result of the masseter muscle's contraction?

Closes the mouth Signup and view all the answers

What anatomical structure does the maxillary branch of the trigeminal nerve enter through?

Foramen rotundum Signup and view all the answers

Which of the following is NOT supplied by the maxillary branch of the trigeminal nerve?

Muscles of mastication Signup and view all the answers

Which structures traverse the superior orbital fissure along with the ophthalmic division of the trigeminal nerve?

Cranial nerves II, III, and IV Signup and view all the answers

What type of sensory modalities does the trigeminal nerve primarily function to sense?

Touch, pain, and temperature Signup and view all the answers

Which division of the trigeminal nerve has a purely sensory function?

Both A and B Signup and view all the answers

Which of the following muscles is NOT innervated by the mandibular division of the trigeminal nerve?

Platysma Signup and view all the answers

What area is NOT part of the sensory supply from the maxillary branch?

Mandibular dentition Signup and view all the answers

Which cranial nerve controls all facial movements except for those supplied by the trigeminal nerve?

Cranial nerve VII Signup and view all the answers

Which structure fills the triangular gap between the medial and lateral pterygoid plates?

Maxillary nerve Signup and view all the answers

Which area is primarily supplied by the sensory roots of the trigeminal nerve?

Skin of face and head Signup and view all the answers

Study Notes

Maxillary Branch of Trigeminal Nerve (CN V2)

Function: Sensory nerve; carries information from the upper teeth, palate, nasal cavity, and skin of the middle face to the brain
Anatomical Regions Supplied:
- Maxillary teeth and supporting structures.
- Hard and soft palate.
- Maxillary sinus.
- Portions of the nasal cavity.
- Skin over the middle part of the face.
Key Branches and Function:
- Greater Palatine Nerve: Supplies the hard palate and palatal gingiva.
- Nasopalatine Nerve: Supplies parts of the nasal septum and tissues around the incisive papilla.
- Infraorbital Nerve: Gives rise to palpebral, nasal, and labial nerves that supply skin of the lower eyelid, side of the nose, and upper lip, respectively.

Mandibular Branch of Trigeminal Nerve (CN V3)

Function: Mixed nerve; both sensory and motor functions
Sensory Function: Carries sensation from the lower teeth, lower face, anterior 2/3 of the tongue, and parts of the temporal region and outer ear.
Motor Function: Controls the muscles of mastication (chewing).
Motor Branches and Muscles:
- Medial Pterygoid: Elevates the jaw.
- Masseter: Elevates the mandible (closes the mouth).
- Temporalis: Elevates the mandible (closes the mouth).
- Lateral Pterygoid: Depresses the mandible (opens the mouth).
- Mylohyoid: Forms part of the floor of the mouth.
- Anterior Belly of Digastric: Involved in jaw movements.
- Tensor Veli Palatini: Important for swallowing.
- Tensor Tympani: Muscle involved in hearing.
Key Nerve Branches Relevant to Dentistry:
- Inferior Alveolar Nerve: Supplies the mandibular teeth, gingiva, and associated structures.
- Mental Nerve: Supplies sensation to the skin of the chin and lower lip and labial gingivae of anterior mandibular teeth.
- Incisive Nerve: Innervates the mandibular incisors and canines.
Anatomical Regions Supplied:
- Mandibular teeth and supporting structures.
- Mucosa of the anterior two-thirds of the tongue and floor of the mouth.
- Skin of the lower face.
- Parts of the temporal region and outer ear.

Relevance to Dentistry

Maxillary Branch: Important for procedures involving the upper teeth, palate, and adjacent structures, and performing anesthesias
Mandibular Branch: Crucial for understanding the innervation of muscles responsible for chewing, managing discomfort and pain experienced by patients during or after dental procedures, and administering anesthesia around lower teeth, gums, and jaws. Specifically, dentists should be aware of the branches (e.g., inferior alveolar nerve) involved for efficient and effective treatment.

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Description

Test your knowledge on the maxillary and mandibular branches of the trigeminal nerve. This quiz covers their functions, anatomical regions supplied, and key branches. Perfect for students in anatomy or healthcare fields.