5A

• cranial cavity contains brain
• nasal cavity:

  • ALWAYS open
  • ANT. nares
  • POST. choanae
• oral cavity:

  • CAN be closed
  • ANT. oral fissure
  • POST. oropharyngeal isthmus
• 4 compartments of neck

  • Vertebral: cervical vertebrae + muscles
  • Visceral: glands, respiratory and digestive tracts
  • 2 vascular: blood vessels and vagus n. (X)
• 3 joints in skull:

  • temporomandibular joint (art. in temporal b. and mandibular b.)
  • 2 in the middle ear
• Fontanelles - membranous unossified gaps, close by age 1 yr
• Suture osffication beings 20 years and completed at 50 years
• 3 sutures:

  • coronal: ANT.
  • saggital
  • lamboid: POST.
• coronal: parietal + frontal b.

  saggital: parietal b. + parietal b.

  lamboid: parietal b. + occipital b.
• skull includes 22 bones
• calvaria: upper dome containing brain aka skull cap

  base: floor of cranial cavity

  facial skeleton: lower anterior part
• touch your supercilliary arch

  
• touch your glabella, supercilliary arch, zygomatic process, and supra-orbital formaen (notch)

  
• touch your naison, frontonasal suture, how many nasal bones? 2.

  
• Are maxilla bones paired?

  Yes.
• Does your maxilla move?

  NO.
• Touch your maxilla:

  • ANT. nasal spine
  • Zygomatic process of maxilla
  • infra-orbital foramen
  • alveolar process (contain teeth)

  
• Mandible is an unpaired bone.
• Touch your: MANDIBLE

  • body and ramus
  • mental protuberance and foramen
  • oblique line - point of att. for muscles

  
• LATERAL VIEW OF SKULL contains:

  • paired: parietal, temporal, occipital, and zygomatic bones
  • unpaired: occipital and sphenoid bones
• Temporal bone 3 parts:

  • squamous
  • tympanic
  • mastoid
• Temporal b. 3 processes:

  • mastoid
  • styloid
  • zygomatic
• LAT VIEW 7 sutures

  
• coronal and lamboid sutures are parallel to each other.
• Touch your pterion:

  • thin bone overlying middle meningeal a.
• 2 zygomatic foramen:

  • zygomaticotemporal
  • zygomaticofacial
• smallest bone?

  lacrimal
• unpaired, separates nasal cavity from brain, cribiform plate?

  ethmoid b.
• Bones of the base of the cranial cavity

  UNPAIRED: frontal, ethmoid, sphenoid, occipital

  PAIRED: temporal, parietal

  
• occiptal b. - UNPAIRED bone

  • squamous part
  • external occipital crest
  • superior/inferior nuchal lines
  • inion
• Calvaria: junctions (2)

  • bregma - ANT.
  • lambda - POST.
• hard palate: roof of the mouth - maxilla + palantine b.

  nonfusion of palatine bones = cleft palate
• Vomer bone is unpaired?

  True