Tongue Development and Innervation

The video explains the development of the tongue, starting from week four of intrauterine life. It details the formation of the anterior and posterior parts of the tongue from different pharyngeal arches, highlighting their separate nerve supplies. The video also covers the embryonic development of related structures, the role of neural crest cells, and the formation of the tongue's muscles and taste buds. Key nerves involved in sensory and motor innervation are discussed, providing a comprehensive overview of tongue development.

What separates the anterior two-thirds and posterior one-third of the tongue?

• Lingual septum

• Hypobranchial eminence

• Terminal sulcus

• Median sulcus

Which structure forms the primitive forebrain during embryonic development?

• Neural crest cells

• Neural tube

• Pharyngeal arches

• Paraxial mesoderm

From which pharyngeal arch does the anterior two-thirds of the tongue develop?

• First

• Second

• Third

• Fourth

What is the name of the midline swelling that initiates the development of the anterior tongue?

• Foramen cecum

• Hypobranchial eminence

• Tuberculum impar

• Copula

Which nerve provides sensory innervation to the anterior two-thirds of the tongue?

• Vagus nerve

• Facial nerve

• Glossopharyngeal nerve

• Trigeminal nerve

Which pharyngeal arches contribute to the development of the posterior one-third of the tongue?

• First and third

• First and second

• Second, third, and fourth

• Third and fourth

What structure grows over the copula to form the posterior tongue?

• Tuberculum impar

• Hypobranchial eminence

• Median sulcus

• Foramen cecum

Which cranial nerve innervates the muscles of the tongue?

• Glossopharyngeal nerve

• Facial nerve

• Vagus nerve

• Hypoglossal nerve

At what week do taste buds start to develop on the tongue?

• Week 13

• Week 4

• Week 8

• Week 11

Which cranial nerves are responsible for taste sensation in the tongue?

• Trigeminal and vagus nerves

• Facial and glossopharyngeal nerves

• Hypoglossal and trigeminal nerves

• Vagus and facial nerves