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NEET MDS Quiz - Practice Test
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Anatomy - 3 Questions

1
Anatomy

Which of the following muscles has two separate functions in mandibular movement

1) Masseter
2) Geniohyoid
3) External(lateral)pterygoid
4) Buccinator

📝 Explanation:

The external (lateral) pterygoid muscle has two primary functions: it assists in depressing the mandible (opening the mouth) and in moving the mandible forward (protrusion). This dual function distinguishes it from other muscles of mastication, which primarily elevate the mandible.

2
Anatomy

Why does mental nerve block cause no tongue numbness?
1). Mental nerve is pure sensory to chin/lip only
2). It is motor nerve
3). Lingual nerve blocked
4). It is branch of facial nerve

📝 Explanation:

The mental nerve is the terminal branch of the inferior alveolar nerve after it exits the mental foramen. It supplies only the skin of the chin, lower lip, and labial gingiva of the incisors, making it useful when tongue numbness is to be avoided.

3
Anatomy
Which lymph nodes first drain tip of tongue and mandibular incisors?
1) Submental nodes (Level Ia)
2) Submandibular nodes
3) Deep cervical
4) Parotid nodes

📝 Explanation:

Tip of tongue + incisors + lower lip + chin -> submental nodes. Rest of tongue (anterior 2/3 lateral border, floor mouth) -> submandibular (Ib). Tip + submental then to submandibular then to jugulo-omohyoid.

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