Embryology Flashcards
where would you find pharyngeal arches
face and neck
when do pharyngeal arches develop
week 4 and 5
what 4 things do pharyngeal arches contain
core mesenchyme derived from paraxial and lateral plate mesoderm
neural crest cells
cranial nerve component
artery
How many arches are there
5 (1,2,3,4,6)
What does the mesenchyme control
musculature of the face and neck
what controls the skeletal components of the face
neural crest cells
where are clefts found
in the ectoderm in between the arches
what separates the arches internally in endoderm side
Pouches
what nerve arises from the 1st pharyngeal cleft
Trigeminal nerve- mandibular and maxillary divisions
which arch does the facial nerve arise from
2nd arch
What nerve arises from the 3rd pharyngeal arch
glossopharyngeal nerve
Where does the superior laryngeal branch form?
arch 4
what arises from 6th arch
recurrent laryngeal nerve
in the first arch, what 3 things make up the skeletal component in maxillary process
maxilla, part of temporal bone and zygomatic process
what is contained within mandibular process (3)
incus, malleus and mandible
what muscles arise from the first arch
mastication muscles, mylohyoid, tensor tympani and palatini
What is the nerve that innervates the face
trigeminal
what skeletal components make up the 2nd arch
stapes, styloid process of temporal bone and stylohyoid ligament
What muscles arise form the 2nd arch
facial expression muscles, stapedius, stylohyoid, auricular muscles
what nerve supplies the 2nd arch
facial nerve
what is the skeletal, muscular and nerves that arise from the 3rd arch
greater horn and lower part of body of hyoid, stylopharyngeus, glossopharyngeal nerve
what muscles would you find in arch 4 and what is their innervation
cricothyroid, levator palatini, pharyngeal constrictors- superior laryngeal nerve
what muscles arise form the 6th arch
intrinsic laryngeal muscle, by recurrent laryngeal nerve
what is found in the first pouch
middle ear, eustachian tube, tympanic membrane
