Neck Practice Questions

Q: Which of the following muscles is the tensor of the vocal cord?

Cricothyroid. The intrinsic muscles of the larynx are categorized based on their action on the vocal cords (folds). Understanding their specific roles is a high-yield topic for NEET-PG. ### **Correct Answer: A. Cricothyroid** The **Cricothyroid** muscle is the primary **tensor** of the vocal cords. It acts by tilting the thyroid cartilage forward or elevating the cricoid cartilage, thereby increasing the distance between the thyroid and arytenoid cartilages. This elongation and tightening of the vocal folds increase the pitch of the voice. * **Nerve Supply:** It is the only intrinsic laryngeal muscle supplied by the **External Laryngeal Nerve** (a branch of the Superior Laryngeal Nerve). ### **Analysis of Incorrect Options:** * **B. Interarytenoid:** This muscle acts as an **adductor** of the vocal cords by pulling the two arytenoid cartilages together, closing the posterior part of the glottis (rima glottidis). * **C. Posterior cricoarytenoid:** This is the **only abductor** of the vocal cords (the "safety muscle of the larynx"). It opens the glottis for breathing. * **D. Lateral cricoarytenoid:** This is a major **adductor** of the vocal cords, acting to close the glottis for phonation. ### **High-Yield Clinical Pearls for NEET-PG:** 1. **Safety Muscle:** Posterior Cricoarytenoid (abductor). 2. **Nerve Supply Rule:** All intrinsic muscles are supplied by the **Recurrent Laryngeal Nerve (RLN)**, *except* the Cricothyroid (External Laryngeal Nerve). 3. **Vocalis Muscle:** A part of the thyroarytenoid, it is responsible for **fine-tuning** tension (relaxing the cords while maintaining tension of the edge). 4. **Injury:** Damage to the External Laryngeal Nerve (often during thyroid surgery) results in the inability to produce high-pitched sounds and easy vocal fatigue.

Q: Which of the following statements is true about the vertebral artery?

A branch of the subclavian artery.. ### Explanation **Correct Answer: C. A branch of the subclavian artery.** The vertebral artery is the first and largest branch of the **first part of the subclavian artery**. It is a vital vessel that supplies the posterior part of the brain (hindbrain) and the spinal cord. It is anatomically divided into four parts: 1. **V1 (Pre-foraminal):** From the subclavian artery to the C6 transverse foramen. 2. **V2 (Foraminal):** Ascends through the foramina transversaria of **C6 to C1**. 3. **V3 (Atlantic):** Curves behind the lateral mass of the atlas (C1) in the suboccipital triangle. 4. **V4 (Intracranial):** Enters the skull and joins the opposite vertebral artery to form the **Basilar artery**. #### Analysis of Incorrect Options: * **Option A:** The vertebral artery enters the skull through the **foramen magnum**, not the condylar canal. The condylar canal typically transmits an emissary vein. * **Option B:** It is a branch of the **subclavian artery**, not the internal carotid. Together with the internal carotid, it forms the Circle of Willis. * **Option C:** While it passes through the foramina transversaria, it is accompanied by a **plexus of sympathetic nerves** (derived from the inferior cervical ganglion) and the **vertebral vein**, but it does not pass through the C7 foramen transversarium (which only transmits the vertebral vein). #### High-Yield Clinical Pearls for NEET-PG: * **C7 Exception:** The vertebral artery enters the transverse foramen at the level of **C6**. The C7 transverse foramen contains only the vertebral vein and sympathetic fibers. * **Suboccipital Triangle:** The 3rd part of the artery lies on the posterior arch of the atlas, making it vulnerable during cervical spine surgeries. * **Wallenberg Syndrome:** Lateral Medullary Syndrome is most commonly caused by occlusion of the **Posterior Inferior Cerebellar Artery (PICA)**, which is a branch of the 4th part of the vertebral artery.

Q: What is the anatomical landmark for applying pressure to control bleeding from a rupture of the carotid artery in the neck region?

C6 vertebra. **Explanation:** The correct answer is **D. C6 vertebra**. The anatomical landmark for controlling carotid artery hemorrhage is the **Carotid Tubercle** (also known as **Chassaignac’s tubercle**). This is the prominent anterior tubercle of the transverse process of the **sixth cervical vertebra (C6)**. Because the common carotid artery lies directly anterior to this bony projection, firm digital pressure applied posteriorly at this level compresses the artery against the bone, effectively occluding blood flow and controlling hemorrhage. **Analysis of Options:** * **A. C3 vertebra:** This level corresponds to the hyoid bone. It is too superior for effective compression of the common carotid trunk. * **B. C4 vertebra:** This is the level of the upper border of the thyroid cartilage and the **bifurcation** of the common carotid artery into the internal and external carotid arteries. While clinically significant, it lacks a prominent tubercle for stable compression. * **C. C5 vertebra:** This level corresponds to the thyroid cartilage body; it does not possess the specific anatomical projection required for vascular compression. **Clinical Pearls for NEET-PG:** * **Chassaignac’s Tubercle:** Named after the French surgeon who described its use for carotid compression. * **Stellate Ganglion Block:** The C6 tubercle is also a vital landmark for performing a stellate ganglion block; the needle is typically inserted at C6 to avoid the vertebral artery and then redirected toward C7/T1. * **Cricoid Cartilage:** The C6 level also marks the junction of the larynx with the trachea and the pharynx with the esophagus.

Q: The axis is the name for which cervical vertebra?

Second cervical vertebra. The cervical spine consists of seven vertebrae (C1–C7). The **second cervical vertebra (C2)** is uniquely known as the **Axis**. Its defining anatomical feature is the **odontoid process (dens)**, a finger-like projection that extends superiorly from the body. This dens serves as a pivot point around which the first cervical vertebra (Atlas) rotates, allowing for the "no" movement of the head at the atlanto-axial joint. **Analysis of Options:** * **Option D (First cervical vertebra):** Known as the **Atlas**. It is unique because it lacks a vertebral body and a spinous process, consisting instead of anterior and posterior arches. It supports the globe of the skull. * **Option B (Third cervical vertebra):** This is a "typical" cervical vertebra. It does not have a specific name and possesses standard features like a bifid spinous process and foramina transversaria. * **Option A (Fourth cervical vertebra):** Also a typical cervical vertebra with no specific nomenclature. **Clinical Pearls for NEET-PG:** 1. **Hangman’s Fracture:** This is a traumatic spondylolisthesis of the axis (C2), usually involving bilateral fractures of the pars interarticularis, often caused by hyperextension of the neck. 2. **Cruciate Ligament:** The transverse ligament of the atlas holds the dens of the axis against the anterior arch of the atlas; its rupture can lead to fatal spinal cord compression. 3. **Vertebra Prominens:** This refers to **C7**, characterized by a long, non-bifid spinous process that is easily palpable at the base of the neck.

Q: Which nerve crosses the submandibular gland?

Facial nerve. The submandibular gland is a key anatomical landmark in the submandibular triangle. To answer this question correctly, one must distinguish between nerves that are in close **proximity** to the gland versus the one that specifically **crosses its superficial surface**. ### Why the Facial Nerve is Correct The **marginal mandibular branch of the facial nerve** (CN VII) descends from the parotid gland, passes below the angle of the mandible, and **crosses the superficial surface** of the submandibular gland. It lies deep to the platysma and the investing layer of deep cervical fascia. This is a critical surgical landmark; during submandibular gland excision, the incision is made at least 2 cm below the mandible to avoid injuring this nerve, which would result in drooping of the corner of the mouth. ### Why Other Options are Incorrect * **Lingual Nerve:** This nerve is related to the **deep surface** of the gland. It "loops" around the submandibular duct (Wharton’s duct), passing from lateral to medial. It does not cross the superficial surface. * **Hypoglossal Nerve (CN XII):** This nerve also lies **deep** to the submandibular gland, running on the surface of the hyoglossus muscle. * **Glossopharyngeal Nerve (CN IX):** This nerve is located much deeper and higher in the carotid triangle and oropharynx; it does not have a direct anatomical relationship with the submandibular gland. ### NEET-PG High-Yield Pearls * **The "Double Crossing":** The Lingual nerve crosses the submandibular duct twice (lateral to medial). * **Ganglion:** The submandibular ganglion (parasympathetic) is suspended from the lingual nerve and supplies secretomotor fibers to the gland. * **Blood Supply:** The **facial artery** grooves the posterior part of the gland before hooking over the mandible. * **Surgical Safety:** To protect the marginal mandibular nerve, the "Hayes Martin" maneuver (ligating and retracting the facial vein upwards) is often used.

Q: Which of the following structures does NOT lie deep to the posterior belly of the digastric muscle?

Retromandibular vein. The posterior belly of the digastric muscle is a key anatomical landmark in the neck, serving as a "bridge" over several major neurovascular structures. Understanding its relationships is high-yield for NEET-PG. ### **Explanation of the Correct Answer** **A. Retromandibular vein:** This is the correct answer because the retromandibular vein (formed by the union of the maxillary and superficial temporal veins) lies **superficial** to the posterior belly of the digastric. It descends within the parotid gland and eventually divides into anterior and posterior divisions, both of which remain superficial to the muscle. ### **Analysis of Incorrect Options (Structures Deep to the Muscle)** The posterior belly of the digastric covers the "carotid triangle" contents. Structures lying deep to it include: * **B. Hypoglossal nerve (CN XII):** This nerve emerges from between the internal jugular vein and internal carotid artery and passes deep to the posterior belly of the digastric to enter the submandibular triangle. * **C. Hyoglossus muscle:** This extrinsic muscle of the tongue lies in the floor of the submandibular triangle, deep to both the digastric muscle and the mylohyoid. * **D. Occipital artery:** This branch of the external carotid artery runs backwards along the lower border of (and deep to) the posterior belly of the digastric. ### **High-Yield NEET-PG Pearls** * **Nerve Supply:** The posterior belly is supplied by the **Facial nerve (CN VII)** (derived from the 2nd branchial arch), while the anterior belly is supplied by the **Nerve to Mylohyoid (V3)** (1st arch). * **The "Deep" Rule:** Almost all major vessels (Internal/External Carotid, Internal Jugular Vein) and nerves (CN IX, X, XI, XII) lie deep to this muscle. * **Superficial Structures:** Only the skin, fascia, platysma, and the **retromandibular vein** (along with the great auricular nerve) are superficial to it.

Q: Which of the following is NOT a branch of the external carotid artery?

Ophthalmic. The **External Carotid Artery (ECA)** is one of the two terminal branches of the common carotid artery, providing the primary blood supply to the exterior of the head, face, and neck. ### **Explanation of the Correct Answer** **B. Ophthalmic Artery:** This is the correct answer because it is a branch of the **Internal Carotid Artery (ICA)**, not the ECA. It arises from the cavernous or cerebral portion of the ICA immediately after it emerges from the cavernous sinus. It enters the orbit via the optic canal to supply the eye and ocular structures. ### **Analysis of Incorrect Options** The ECA typically gives off **eight branches**, which can be remembered by the mnemonic: *"**S**ome **A**natomists **L**ike **F**reaking **O**ut **P**oor **M**edical **S**tudents."* * **A. Superior Thyroid:** The first anterior branch of the ECA. It descends to supply the upper pole of the thyroid gland and gives off the superior laryngeal artery. * **C. Lingual:** The second anterior branch, arising at the level of the greater cornua of the hyoid bone. It is the primary blood supply to the tongue. * **D. Ascending Pharyngeal:** The only medial branch and usually the smallest branch of the ECA. It ascends between the internal carotid and the pharynx. ### **High-Yield Clinical Pearls for NEET-PG** * **Terminal Branches:** The ECA ends within the parotid gland by dividing into the **Maxillary artery** and **Superficial Temporal artery**. * **ICA vs. ECA:** In the neck, the ICA generally has **no branches**, whereas the ECA has several. This is a key surgical landmark. * **Clinical Correlation:** The **Middle Meningeal Artery** is a branch of the Maxillary artery (from ECA). Its rupture leads to **Extradural Hemorrhage (EDH)**. * **Carotid Triangle:** Most branches of the ECA originate within the carotid triangle of the neck.

Question 1

Which of the following muscles is the tensor of the vocal cord?

Accepted Answer

Cricothyroid

Answer

Interarytenoid

Answer

Posterior cricoarytenoid

Answer

Lateral cricoarytenoid

Question 2

Which of the following arteries supply the Sternocleidomastoid muscle?

Accepted Answer

Posterior auricular artery

Answer

Superior Thyroid artery

Answer

Occipital artery

Answer

Suprascapular artery

Question 3

Which of the following statements is true about the vertebral artery?

Accepted Answer

A branch of the subclavian artery.

Answer

Enters the skull through the condylar canal.

Answer

A branch of the internal carotid artery.

Answer

Accompanies sympathetic ganglione and passes through the foramen transversarium of cervical vertebrae.

Question 4

Which of the following arteries supplies the thyroid gland?

Accepted Answer

Thyrocervical trunk

Answer

Internal carotid artery

Answer

Lingual artery

Answer

Subclavian artery

Question 5

What is the anatomical landmark for applying pressure to control bleeding from a rupture of the carotid artery in the neck region?

Accepted Answer

C6 vertebra

Answer

C3 vertebra

Answer

C4 vertebra

Answer

C5 vertebra

Question 6

The axis is the name for which cervical vertebra?

Accepted Answer

Second cervical vertebra

Answer

Fourth cervical vertebra

Answer

Third cervical vertebra

Answer

First cervical vertebra

Question 7

Which nerve crosses the submandibular gland?

Accepted Answer

Facial nerve

Answer

Lingual nerve

Answer

Hypoglossal nerve

Answer

Glossopharyngeal nerve

Question 8

Which of the following structures does NOT lie deep to the posterior belly of the digastric muscle?

Accepted Answer

Retromandibular vein

Answer

Hypoglossal nerve

Answer

Hyoglossus muscle

Answer

Occipital artery

Question 9

Which of the following is NOT a branch of the external carotid artery?

Accepted Answer

Ophthalmic

Answer

Superior thyroid

Answer

Lingual

Answer

Ascending pharyngeal

Question 10

The sinus of Morgagni is located between which structures?

Accepted Answer

Superior constrictor muscle of the pharynx and the skull base

Answer

Middle constrictor and inferior constrictor muscles of the pharynx

Answer

Middle constrictor and superior constrictor muscles of the pharynx

Answer

None of the above

Neck — MCQs

Neck — MCQs

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