Branchial arch skeletal, muscle, nervees, and other derivatives (dave's notes) Flashcards
What are the skeletal derivatives of the first branchial arch?
Mandible and maxilla
What are the skeletal derivatives of the second branchial arch?
Stapes, styloid process, stylohyoid ligament, lesser horn and upper body of hyoid
What are the skeletal derivatives of the third branchial arch?
Greater horn and caudal part of the body of the hyoid
What are the skeletal derivatives of the 4th, 5th, and 6th branchial arches?
Thyroid, cricoid, epiglottic and arytenoid cartilages
What are the muscles of the first branchial arch?
Muscles of mastication, mylohyoid, anterior belly of digastric and tensor muscles
What are the muscles of the second branchial arch?
Muscles of fascial expression, stapedius stylohyoid, posterior belly of digastric
What are the muscles of the third branchial arch?
Stylopharyngeus
What are the muscles of the 4th, 5th and 6th branchial arches?
Intrinsic muscles of the larynx, muscles of the pharynx, levator palati
What is the nerve of the first branchial arch?
Mandibular nerve
What is the nerve of the second branchial arch?
Facial nerve
What is the nerve of the third branchial arch?
Glossopharyngeal nerve
What is the nerve of the 4th, 5th, and 6th branchial arches?
Laryngeal and pharyngeal branches of the vagus
What does the endoderm of the first branchial arch develop into?
Middle ear and mastoid antrum
What does the dorsal diverticulum of the second branchial arch develop into?
The formation of the tympanic cavity
What does the external branchial groove of the first branchial arch become?
The external acoustic meatus
What does the ventral development of the second branchial arch become?
The tonsillar crypts and supratonsillar fossa )GPn and Fn)
What does external surface of the third branchial arch become?
The thymic rudiment becomes the thymus gland
What does the ventral surface of the fourth pouch become?
The pouch is attached to the thyroid, preventing descent of the fourth parathyroid glands (the superior parathyroids in the adult)
What does the dorsal surface of the fourth pouch become?
the superior parathyroid gland
