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EMBRYO DEVELOPMENT, Pharyngeal Apaaratus (forms face, nasal cavities,…

- - - - 4: cricothyroid, levator palantini, pharyngeal constrictors
      - 6: intrinsic muscles of larynx
    - - 4: Superior laryngeal n
      - 6: Recurrent laryngeal n
    - - Cricoid cartilage
      - Arytenoid
      - Thyroid cartilage
    - - 4: Arch of aorta & right subclavian a
      - 6: ductus arteriosus: pulmonary trunk
    - - CN X: Vagus (taste & sensation)
  - - - STYLOPHARYNGEUS
    - - GLOSSOPHARYNGEAL CN IX
    - - Greater cornu
      - Inferior body of hyoid
    - - Common carotid a
      - Root of ICA
    - - CN IX receives taste &
        General sensory from region
  - - - Occipitofrontalis, orbicularis orris/oculi
        buccinator
        Labial muscles
        Zygomaticus major & minor
        nasalis
        Platysma
        POSTERIOR DIGASTRIC (anterior came from arch 1)
        Stylohyoid
        stapedius
    - - FACIAL CN VII
    - - Styloid process
      - Stylohyoid ligament
      - Stapes
      - Lesser cornu/horn & superior body of hyoid
    - - Stapedial a (regresses)
    - - Taste from anterior 2/3 of tongue
        via chorda tympani branch of CN VII (TASTE)
  - - - ANTERIOR Digastric
      - Mylohyoid
      - Muscles of mastication
        (Masseter, Temporalis, Pterygoids)
      - Tensor tympani
      - Tensor veil palatini
    - - TRIGEMINAL (CN V V2&V3)
    - - Mandibular process (mandible and Squamous temporal bone)
      - Mallelus
        
        EAR
        (SSA Fibers)
      - Maxillary process (maxilla, zygomatic bone, some vomer)
      - Incus
      - sphenomandibular ligament
    - - Maxillary a.
    - - Two lateral lingula swellings (distal tongue buds) OVERGROW median
        •Forms mucosa of anterior 2/3 of tongue
        Innervated by CN V (SENSATION ONLY)
        
        TONGUE
- - - - 2 Lateral NP
      - Nasal Pit
        
        Nasal cavity
      - 2 Medial NP
        
        Fuse--> Philtrum
        
        Fuse--> +primary palate/premaxilla
        intermaxilary segment
        
        Fuse w
        Medial
        
        Upper jaw & upper lip
        
        1 palate
        premaxila)
        
        1 more item...
        
        2 palatineshelves
        Hard pallet
        
        1 more item...
  - - - Maxilla
        
        fuses=continuity b/w
        lateral nose & cheek
  - - - Mandible
        
        Lower lip & Lower Jaw
        ALLOWS Ears ACCEND
- - - - Fuses/closes & REMNANAT is FORAMEN CECUM
- - - - Neural Groove
        
        Neural folds
        (neural crest migrate away)
        
        Neural tube
        
        Fusion continues
        rostrally and caudally
        
        Rostral neuropre
        
        Vesicle formation
        Week 3-4
        
        3 more items...
        
        Caudal neuropore
        
        CNS cells differentiate
        (EXCEPT microglia come from mesenchymal cells)
        
        PNS cells differentiate from
        NEURAL CREST cells