Pharyngeal Arches Flashcards
Which nerve is the first arch derived from?
Trigeminal
What two arteries come from arch 6?
- Ductus arteriosus
- Pulmonary arteries
What is this a derivative of?
Laryngeal cartilages
4 and 6
• 3rd arch artery forms part of the ______
common carotid artery
What bone forms around meckel’s cartliage?
Mandible
What muscles are these muscles derived from?
- Mastication: temporalis, masseter, medial and lateral pterygoids
- Mylohyoid
- Ant Belly of Digastric
- Tensor Veli Palatini
- Tensor Tympani
Arch 1: Mandibular
What is the first medodermal derivative to appear?
Aoritc arch artery
What artery comes from the first arch?
Maxillary
What are some derivatives of Meckel’s caritlage?
What arch is this muscle a derivative of?
- Stylopharyngeus
3rd
What arch are these anomalies of?
- Congenital laryngeal stridor
- Laryngomalacia
- malformed larynx
- weak larynx muscles
- stridor- high pitched sound during inspiration
4 and 6
• 4th arch artery forms ______
arch of the aorta
What two arteries are derivatives of pharngeal arch 4?
Aortic arch
R subclavian
What nerve is the 2nd pharngeal arch formed from?
Facial nerve
What are these examples of?
Branchial cysts and fistulas
In 4th pouch derivatives what body fuses with the thyroid gland and contributes parafollicular cells that produce calcitonin, a hormone that regulates calcium levels
Utimobranchial body
What nerve is the 3rd pharngeal arch a derivative of?
Glossopharyngeal
What arch are these anomalies from?
- Hyoid malformation
- Muscular asymmetry of the face
- Conductive hearing loss
- malleus, incus, stapes defects
- Microtia
2nd arch
What arch forms from the maxillary and mandibular prominence?
Arch 1
What artery is from the 3rd pharngeal arch?
Common and internal carotid
What pouch are these derivatives of?
- Tympanic cavity
- pharygotympanic tube
- mastoid antrum
Pouch 1
What arch are these derived from:
Intrinsic laryngeal muscles
Arch 6
The hindbrain is “segmented” into compartments called
rhombomeres
What is the membrane where pouches meet clefts?
Pharngeal membranes
Made of ecto and edoderm
What arch are these muscles a derivative of?
- Pharyngeal constictors
- cricothyroid
- levator veli palatini
4
Anonamilies that primarily affect blood vessels comes from which arch?
3rd because of common carotid artery
What pouch are these derivatives of?
- Palatine (tonsillar) fossa
- largely obliterates pouch
- tonsilar sinus
- depression between the palatoglossal and palatopharngeal arches
Pouch 2
What arch are these muscles derived from:
- Facial expression
- post belly of digastric
- stylohyoid
- stapedius
2nd arch: Hyoid
What artery comes from the second pharngeal arch?
Stapedial
What pouch are these derivatives of?
- inferior parathyroid glands
- thymus
Pouch 3
What arch are these bones derivived from?
- Stapes
- Styloid process
- stylohyoid lig
- lesser horn and upper body of hyoid bone
2nd arch: Hyoid
What arch are these parts of the skeleton derived from?
- Maxilla
- Mandible
- Greater wing of sphenoid
- Zygomatic bone (squamous part)
- Temoral bone
- Meckel’s cartilage
- Ant. Lig. of malleus
- Sphenomandibular ligament
- Incus
- Malleus
Arch 1: Mandibular
What nerve is the 6th arch a derivative of?
Vagus (inferior and recurrent laryngeal)
What arch are these abnormalities from?
- Malformations of eyes, ears, palate and mandible
- critical period is week 6-7
- abnormalities are symmetrical and bilateral
- Failure of neural crest cell migration leads to defects or loss of musculoskeletal derivatives
Arch 1
What is this syndrome?
DiGeorge Syndrome
What is this syndrom?
Treacher Collins Syndrome
• 6th arch artery forms ______
pulmonary artery
What separates arches on the endodermal (inner side)?
Pharngeal pouches
What nerve is the 4 arch a derivative of?
Vagus (superior laryngeal)
What pouch are these derivatives of?
- superior parathyroid glands
- parafollicular cells of thyroid
What arch are these bones a derivative of?
- greater and lower body of hyoid bone
3rd
What seperates arches on the ectodermal (outer) side?
clefts
