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30 viva question and answers in muscles of head and neck

These questions cover various aspects of anatomy, function, and clinical relevance. Remember to study the subject thoroughly to understand these questions better.

  1. What are the major muscles of mastication?
  • Masseter, temporalis, medial pterygoid, lateral pterygoid.
  • What is the function of the temporalis muscle?
  • The temporalis muscle is responsible for closing the jaw during biting and chewing.
  • Which muscle allows you to protrude the mandible?
  • Lateral pterygoid.
  • What is the action of the masseter muscle?
  • Elevates the mandible.
  • Name the muscles responsible for rotating and flexing the head.
  • Sternocleidomastoid.
  • Which muscle is involved in lateral flexion of the neck?
  • Scalene muscles.
  • What is the innervation of the sternocleidomastoid muscle?
  • Accessory nerve (CN XI) and cervical spinal nerves.
  • Name the muscles that form the floor of the mouth.
  • Mylohyoid and geniohyoid.
  • What is the function of the platysma muscle?
  • Tenses the skin of the neck and depresses the mandible.
  1. Which muscle is involved in swallowing?
  • Stylopharyngeus, mylohyoid, geniohyoid, and the muscles of the pharynx.
  1. What is the function of the digastric muscle?
  • Elevates the hyoid bone and depresses the mandible.
  1. Which muscle is responsible for retracting the mandible?
  • Posterior fibers of the temporalis muscle.
  1. What nerve innervates the muscles of facial expression?
  • Facial nerve (CN VII).
  1. Which muscle is responsible for wrinkling the forehead?
  • Frontalis muscle.
  1. Name the muscles responsible for closing the eyelids.
  • Orbicularis oculi.
  1. What is the function of the buccinator muscle?
  • Compresses the cheek, assisting in actions like blowing and sucking.
  1. Which muscle is involved in smiling?
  • Zygomaticus major and minor.
  1. What is the primary function of the levator labii superioris muscle?
  • Elevates the upper lip.
  1. Name the muscles that control the movement of the tongue.
  • Intrinsic and extrinsic muscles, including genioglossus, styloglossus, and hyoglossus.
  • What is the function of the sternohyoid muscle?
  • Depresses the hyoid bone.
  • Which muscle assists in turning the head to the opposite side when acting unilaterally?
  • Splenius capitis and splenius cervicis.
  • What is the action of the occipitofrontalis muscle?
  • Raises the eyebrows and wrinkles the forehead.
  • Which muscle is responsible for depressing the lower lip?
  • Depressor labii inferioris.
  • Name the muscles that form the posterior triangle of the neck.
  • Sternocleidomastoid, trapezius, and clavicle.
  • What is the primary action of the muscles of the pharynx?
  • Swallowing.
  • Which muscles are involved in the lateral movement of the jaw?
  • Medial and lateral pterygoid muscles.
  • What is the role of the stylohyoid muscle?
  • Elevates and retracts the hyoid bone.
  • Which muscle is responsible for protruding and rounding the lips?
  • Orbicularis oris.
  • What is the clinical significance of the sternocleidomastoid muscle?
  • Used as a landmark in head and neck examinations.
  • Which muscle is responsible for depressing the angle of the mouth?

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