Lecture 23 Flashcards
Visceral component of the skull
Bones around the mouth
Neural component of the skull
Bones protecting the brain
To what does “cranium” refer?
The skull minus the mandible
Viscerocranium
Formed by the union of the maxillary bones and the zygomatic bones
Neurocranium
- Formed by bones making “calvaria” (skull cap)
- Fused frontal bones, paired parietal bones, squamous portion of temporal bones, and occipital bones
- Separated by sutures
Inner table
- Compact bone
- Periosteuim attaches to dura mater
Outer table
- Compact bone
- Periosteuim attaches to scalp
Dipolë
- Cancellous bone
- Cancellous bones contains veins which are named for the area where they are located.
Ex: occipital
Sagittal suture
Separates the two parietal bones
Coronal suture
Separates the frontal bone from the parietal bones and helps form the “soft spot,” or “bregma”, in the infant
Lambdoidal suture
separates the occipital bone from the parietal bones
Metopic suture
Separates the frontal bones prior to their fusion around 6 or 8 months of age
Squamosal suture
Separates parietal from squamous portion of temporal bone
Small Wormian/Suture bones
- may be found lying within the sutures of individual calvaria bones
Diploic veins coursing within the dipolë
- Frontal veins
- Anterior temporal veins
- Posterior temporal veins
- Occipital veins
Emissary veins
May pierce the skull and connect the veins of the scalp with diploid veins and internal venous sinuses
