Branchial Arches Flashcards
each brachial arch has its own….?
- muscular component, arterial component, cranial nerve, and cartilage component
what muscles are a part of the first pharyngeal arch?
Temporalis, mylohyoid and masseter
What muscles are derived from the second pharyngeal arch?
- frontalis
- orbicularis occuli
- buccinator
- orbicularis oris
- auricularis
- stylohyoid
- posteror belly of digastric
- platysma
what muscles are derived from the third pharyngeal arch?
the stylopharyngeus
what muscles are derived from the 4th and 6th pharyngeal arches?
pharyngeal muscles
what cranial nerves are associaed with the 1st, 2nd and 3rd brachial arches?
1st = trigeminal
2nd = facial
3r = glossopharyngeal
4 and 6th = vagus
What structures are derived from the first arch?
Trigeminal Nerves
- Masseter
- temporalis
- pterygoids (lat and med)
- tensor tympani
- tensor palatini
- mylohyoid
- anterior belly digastric
- sensory to face
second arch provides what structures?
Facial nerve
- stapes bone
- hyoid bone
- styloid process
- stylohyoid ligament
- stapedius
- stylohyoid
- posterior belly digastric
- muscles of facial expression
what structures arise from the third brachial arch?
glossopharyngeal
- part of hyoid bone
- stylopharyngeus
- posterior 1/3 of tongue sensory
- carotid sinus
- common carotid
- proximal internal carotid
- external carotid
*
what structures arise from the 4th and 6th arches?
Vagus nerve
- cartilages of the larynx
- cricothyroid
- levator palitini
- constrictors of the pharynx
- superior laryngeal nerve
- right subclavian
- arch of aorta
- cricoid cartilage
- pulmonary artery
- ductus arteriosus
what structures arise from the first pouch?
middle ear
eustachian tube
tympanic membrane
what structures arise from the second pouch?
tonsillary crypt/fossa
what structures arise from the third pouch?
thymus gland
inferior parathyroids
what structures arise from the fourth pouch?
superior parathyroids and the ultimobranchial body
what structures arise from the 1st cleft?
external auditory meatus
