Flashcards
OCB02-1005-Pharyngeal arch development
Cards in this deck (33)
- 1Which part of the neural tube becomes the fore/mid/hind brain?Anterior neural tube
- 2What are the rhombomeres? What do they form?8 bulges on neural tube that forms hindbrain
- 3What are somatomeres?7 segments made of mesoderm
- 4What are somites?Fully segmented somatomeres
- 5What does the midbrain/ rhomnomeres 1+2 become?Face and 1st branchial arch
- 6What is the stomatodeum?Shallow depression in the frontal prominence that is part of the developing face
- 7Pharyngeal clefts are located on... and are made of ...The outside
Ectoderm - 8Pharyngeal arches are located on... and are made of ...The middle
Mesenchymal tissue (mesoderm+neural crest) - 9Pharyngeal pouches are located on... and are made of ...The Inside
Endoderm - 10What are the five pharyngeal arches?1, 2, 3, 4, 6
- 11What are the three things each pharyngeal arch contains?1. Nerve
2. Cartilage
3. Artery - 12PA 1 Muscle (mesoderm): Cartilage (neural crest): Nerve:Muscle: muscles of mastication
Cartilage: Meckel's cartilage (becomes malleus/incus)
Mandibular, Maxillary Process
Nerve: CNV Trigeminal - 13PA 2 (hyoid) Muscle (mesoderm): Cartilage (neural crest): Nerve:Muscle: Muscles of facial expression
Cartilage (neural crest): Stapes, styloid process, stylo-hyoid ligament, lesser horns of hyoid
Nerve: CNV11 Facial - 14PA 3 Muscle (mesoderm): Cartilage (neural crest): Nerve:Muscle: Stylopharyngeus
Cartilage: Greater horns of hyoid
Nerve: CNIX Glossopharyngeal - 15PA 4 Muscle (mesoderm): Cartilage (neural crest): Nerve:Muscle: Constrictors of pharynx
Cartilage: Cartilages of larynx (eg. thyroid)
Nerve: CNX Superior laryngeal - 16PA 6 Muscle (mesoderm): Cartilage (neural crest): Nerve:Muscle: Intrinsic muscles of larynx
Cartilage: Cartilages of larynx
Nerve: CNX recurrent laryngeal - 17What fuses to form the upper lip, alveolus, primary palate?Bilateral maxillary processes fuse with medial nasal process (into intermaxillary process)
- 18What does the lateral nasal process fuse to form?Alar of nose
- 19What does the mandibular process form?Lower lip/jaw
- 20When do palatal shelves develop?Late 7th/8th week
- 21What is the primary palate formed by?Extension of intermaxillary process
- 22What is the secondary palate formed by?Palatine shelves that grow medially from maxillary prominences
- 23What is cleft palate caused by?1. Palatal shelves fail to fuse during 7-10 week of development
2. Inadequate growth of shelves
3. Secondary rupture after fusion
4. Failure of shelves to elevate above tongue - 24What are 1st Pharyngeal Arch abnormalities?1. Treacher-Collins syndrome
- underdeveloped facial bones, small lower jaw
2. Acro-facial dysostosis
- no angle between neck and chin, prominent forehead
3. Hemifacial microsomia
- affects half the face and derivatives from 1st/2nd PA - 25Pharyngeal Cleft 1external auditory tube
- 26Remnants of Pharyngeal Cleft can lead toCysts
- 27Pharyngeal Pouch 1Auditory tube/middle ear cavity
- 28Pharyngeal Pouch 2Crypts of palatine tonsil
- 29Pharyngeal Pouch 3Dorsal forms inferior parathyroid glands
Ventral forms thymus - 30Pharyngeal Pouch 4Dorsal/superior forms superior parathyroid glands
- 31Pharyngeal Pouch 5 (aka ventral part of pouch 4)Ultimobrachial body - forms the parafollicular cells
- 32What are the two mesodermal origins of the tongue muscles?Lower pharyngeal arches
Hypoglossal cord - 33Ankyloglossia is whenTongue tied to bottom of oral cavity
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- Description
- Know the different tissue origins of the face (neural crest, mesoderm and ectoderm) Know what part of the face each facial primordial gives rise to in the adult face Know which facial primordia fuse to generate the upper lip, primary and secondary palate. Know the fate of the pharyngeal arches i.e which bones and muscles arise from each arch , Know the fate of the pharyngeal clefts and pouches Know the innervation of each pharyngeal arch Appreciate the link cranial and cardiac development
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- Evian Chai
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