Pharyngeal Derivatives Flashcards
Pharyngeal Arch 1:Cartilage Derivatives
The M’s and T’s Maxillary process
- Maxilla
- zygoMatic bone Mandibular Process
- Meckel cartilage
- Mandible
- Malleus
- Incus
- sphenoMandibular ligament
Pharyngeal Arch 1:Muscle Derivatives
The M’s and T’s Muscles of Mastication
- Masseter
- Medial ptyregoid
- Lateral ptyregoid
- Temporalis
- Myelohyoid
- tensor Tympani
- Tensor Veli Palantini
- Anterior Belly of the Digastric
- Ant 2/3 of Tongue
Pharyngeal Arch 1:Nerve Derivatives
The M’s and T’s
- Mandibular branch of Trigem V3
- Maxillary branch of Trigem V2
- (Chew)
Pharyngeal Arch 2:Cartilage Derivatives
S Structures
- Stapes
- Styloid Process
- Stylohyoid Ligament
- Lesser horn of hyoid
Pharyngeal Arch 2:Muscle Derivatives
S Structures
- Muscles of facial expression
- Stapedius
- Stylohyoid
- platySma
- posterior belly of digastric
Pharyngeal Arch 2:Nerve Derivatives
S Structures CN Seven (facial expression Smile)
Pharyngeal Arch 3:Cartilage Derivatives
Think Pharyngeal
* Greater horn of hyoid
Pharyngeal Arch 3:Muscle Derivatives
Think Pharyngeal Stylopharyngeus
- (forms posterior 1/3 of tongue with Arch 4)
Pharyngeal Arch 3:Nerve Derivatives
Think Pharyngeal Glossopharyngeal (CN 9) (innervates stylopharyngeous; swallow Styl-ishly
Pharyngeal Arch 4:Cartilage Derivatives
Think Cricoid, Thyroid, and LarynxThis also forms structures in conjunction with Arch 6
- Arytenioids
- Corniculate
- Cuniform
- Cricoid cartilage
- Thyriod cartilage
- Cartilage of larynx
Pharyngeal Arch 4:Muscle Derivatives
Think Cricoid, Thyroid, and Larynx
- Cricothyroid muscles
- Pharyngeal Muscles (pharyngeal constrictors) (Swallowing)
- Levator veli palatini
- (forms posterior 1/3 of tongue with Arch 3)
Pharyngeal Arch 4:Nerve Derivatives
Think Cricoid, Thyroid, and LarynxThis also forms structures in conjunction with Arch 6 CN 10 (4+6=10)
- Superior Laryngeal
- (Simply Swallow)
Pharyngeal Arch 5:Cartilage Derivatives
THIS ARCH DOES NOT DEVELOP/PROGRESS
Pharyngeal Arch 5:Muscle Derivatives
THIS ARCH DOES NOT DEVELOP/PROGRESS
Pharyngeal Arch 5:Nerve Derivatives
THIS ARCH DOES NOT DEVELOP/PROGRESS
Pharyngeal Arch 6:Cartilage Derivatives
Think Cricoid, Thyroid, and LarynxThis also forms structures in conjunction with Arch 4
- Arytenioids
- Corniculate
- Cuniform
- Cricoid cartilage
- Thyriod cartilage
- Cartilage of larynx
Pharyngeal Arch 6:Muscle Derivatives
Think Cricoid, Thyroid, and Larynx
- Rest of Laryngeal Muscles (speech) not formed by Arch 4
- I.E. All intrensic muscles of the larynx EXCEPT CRICOTHYROID
Pharyngeal Arch 6:Nerve Derivatives
Think Cricoid, Thyroid, and LarynxThis also forms structures in conjunction with Arch 4 CN 10 (4+6=10)
- Reccurent laryngeal
- Speak
1st Pharyngeal CleftDerivatives
- External auditory meatus
2nd Pharyngeal CleftDerivatives
Temporary Cervical Sinuses
* With the 3rd and 4th Clefts
* (are eventually obliterated by proliferation of 2nd arch mesenchyme)
(If persistant→ Branchial Cleft Cyst in lateral neck; anterior to sternocleidomastoid muscle and immobile during swallowing (contrasting to Thryoglossal Duct Cyst which is midline and mobile w/ swallowing))
3rd Pharyngeal CleftDerivatives
Temporary Cervical Sinuses
* With the 2nd and 4th Clefts
* (are eventually obliterated by proliferation of 2nd arch mesenchyme)\
(If persistant→ Branchial Cleft Cyst in lateral neck; anterior to sternocleidomastoid muscle and immobile during swallowing (contrasting to Thryoglossal Duct Cyst which is midline and mobile w/ swallowing))
4thPharyngeal CleftDerivatives
Temporary Cervical Sinuses
* With the 2nd and 3rd Clefts
* (are eventually obliterated by proliferation of 2nd arch mesenchyme)
(If persistant→ Branchial Cleft Cyst in lateral neck; anterior to sternocleidomastoid muscle and immobile during swallowing (contrasting to Thryoglossal Duct Cyst which is midline and mobile w/ swallowing))
1st Pharyngeal PouchDerivatives
- Middle Ear Cavity
- Eustachian tubes
- Mastoid air cells
(contributes to the endoderm lined structures of the ear)
2nd Pharyngeal PouchDerivatives
- Epithelial lining of the palatine tonsils
3rd Pharyngeal PouchDerivatives
Dorsal wings
- Inferior parathyroid glands Ventral wings
- Thymus
4thPharyngeal Pouch Derivatives
Dorsal Wings
- Superior Parathyroid glands Ventral Wings
- Ultimobranchial body
- Parafollicular (C) Cells of the Thyroid
1st Aortic Arch
Part of Maxillary artery
* (a branch of the external carotid)
(1st arch is MAXimal)
2nd Aortic Arch
- Stapedial artery
- Hyoid artery
(Second = Stapedial)
3rd Aortic Arch
- Common Carotid artery
- Proximal part of Internal Carotid artery
(C is the 3rd letter of the alphebet)
4th Aortic Arch
On Left
* Aortic Arch On Right
* Proximal part of Right Subclavian
(4th arch (4 limbs) = Systemic)(Right recurrent Laryngeal nerve loops around proximal right sublavian from 4th)(Left recurrent Laryngeal nerve loops around aortic arch DISTAL to ductus arteriosus (not sure if that portion of the arch is from 4th)
6th Aortic Arch
- Proximal part of pulmonary arteries (part proximal to that is from truncus arteriosus)
- Ductus arteriosus
(6th arch = pulmonary and the pulmonary to systemic shunt)
