Pharyngeal Arches Flashcards
What are the names of first two pharyngeal arches?
I - mandibular
II - hyoid
What aortic arch artery is from arch 1?
maxillary artery
What aortic arch artery is from arch 2?
hyoid artery
stapedial artery
- disappear later
What aortic arch artery is from arch 3?
internal carotid artery
What aortic arch artery is from arch 4?
right subclavian artery
aorta
What is the cranial nerve for arch 2?
CN VII (facial)
What is the cranial nerve for arch 1?
CN V (trigeminal)
What is the cranial nerve for arch 3?
CN IX (glossopharyngeal)
What is the cranial nerve for arch 4?
CN X (vagus)
What are the branchiomeric muscles for arch 1?
- muscles of mastication
- tensor tympani
- mylohyoid
- tensor veli palatini
- anterior belly of digastric
What are the branchiomeric muscles for arch 2?
- muscles of facial expression
- stapedius
- stylohyoid
- posterior belly of digastric
What are the branchiomeric muscles for arch 3?
- stylopharngeus
What are the branchiomeric muscles for arch 4?
- pharyngeal and laryngeal musculature
What are the skeletal derivatives of arch 1?
- malleus
- incus
- sphenomandibular ligament
- Meckel’s cartilage
- tympanic ring
What are the skeletal derivatives of arch 2?
- stapes
- styloid process
- stylohyoid ligament
- less horn of the hyoid
- part of the body of hyoid
What are the skeletal derivatives of arch 3?
- greater horn of hyoid
- part of body of hyoid
What are the skeletal derivatives of arch 4?
Laryngeal cartilages
What is in the pharyngeal groove (1) of arch 1 and 2?
external auditory meatus
external ear
What is in the pharyngeal groove between arches II, III, and IV?
cervical sinus (temporary)
What is in the pharyngeal pouch 1?
middle ear
auditory tube
What is in the pharyngeal pouch 2?
supratonsilar fossa
What is in the pharyngeal pouch 3?
thymus
inferior parathyroid gland
What is in the pharyngeal pouch 4?
superior parathyroid gland
post branchial body
What are the two processes of the first (mandibular) arch?
maxillary and mandibular
Which pharyngeal arches develop into facial and neck structures that can be observed externally?
1
2
What is stern’s rule?
What is the adult derivative of the 1st pharyngeal pouch?
- auditory (pharyngotympanic, eustachian) tube
- middle ear (tympanic cavity)
- part of the eardrum (tympanic membrane)
What is the adult derivative of the 2nd pharyngeal pouch?
- tonsillar crypt
What is the adult derivative of the 3rd pharyngeal pouch?
- inferior parathyroid glands
- thymus gland
What is the adult derivative of the 4th pharyngeal pouch?
- superior parathyroid gland
- ultimobranchial body
What is the adult derivative of the 5th pharyngeal pouch?
- ultimobranchial body
