Pharyngeal Arches Flashcards
What are the two main sources of the mesenchyme core of the pharyngeal arch?
Mesoderm and neural crest
What is the name of the first pharyngeal arch?
Mandibular arch
Name the muscles derived from the first pharyngeal arch
Muscles of mastication Ant. Belly of digastric Mylohyoid Tensor tympani Tensor veli palatini
Name the skeletal elements derived from the first pharyngeal arch
Maxilla Zygoma Mandible Malleus Incus
Name the nervous supply to structures derived from the first pharyngeal arch
Trigeminal
Name the arteries that supply structures of the first pharyngeal arch
Maxillary
External carotid
What is the name of the second pharyngeal arch?
Hyoid arch
Name the muscles derived from the second pharyngeal arch
Muscles of facial expression
Stapedius
Stylohyoid
Posterior belly of digastric
Name the skeletal elements derived from the second pharyngeal arch
Styloid process
Stylohyoid ligament
Lesser horn and upper body of hyoid bone
Name the nervous supply to structures of the second pharyngeal arch
Facial
Name the muscle derived from the third pharyngeal arch
Stylopharyngeus
Name the skeletal derivatives of the third pharyngeal arch
Greater horn of hyoid and lower body
Name the nervous supply to the third pharyngeal arch
Glossopharyngeal
Name the vascular derivative of the third pharyngeal arch
Common carotid arteries
Name the musculature derived from the 4th and 6th pharyngeal arches
4th - muscles of the pharynx
6th - muscles of the larynx
Name the nervous and arterial supply of the fourth pharyngeal arch
Vagus - superior laryngeal
Left gives aortic arch, right gives subclavian
Which nerve supplies the 6th pharyngeal arch?
Recurrent laryngeal
Which vessels are derived from the 6th pharyngeal arch?
Pulmonary vessels
What is derived from paraxial mesoderm?
All voluntary muscles, arteries, neurocranium, meninges, dorsal skin
What type of tissue are the laryngeal cartilages derived from?
Lateral plate mesoderm
What type of tissue is the viscerocranium derived from?
Neural crest cells
Which two tissues interact to form neural sensory ganglia?
Neural crest cells and ectodermal placodes
What gives rise to the external auditory meatus?
Dorsal part of the first cleft
Which clefts form the cervical sinus?
2nd 3rd and 4th
