Sphenoid bone is mainly ossified from pre- and post-sphenoid centers with some contribution from alisphenoid
and orbitosphenoid centers.
The foramina of the carotid circulation consist of pattern 1 (sensu Voss, 1988); a thick alisphenoid
strut is present, and the subsquamosal fenestra is large (Figs.
In this study the evaluation of the FS and FV and their respective relationships to FO may provide a reliable osteometric standardization of the alisphenoid
structures in the middle cranial fossa.
First ossification of Dentary Premaxilla Maxilla Frontal Jugal Parietal Squamosal Alisphenoid
Basioccipital Basisphenoid Exoccipital Periotic Other skeletal elements Membrane bones approach midline Cartilage in basioccipital region Closure of secondary palate First appearance of tooth buds Differentiation of malleus and incus Differentiation of condylar cartilage Joint capsule at dentary-squamosal joint Muscle First alignment of myoblasts (tongue) First appearance of striations Craniofacial muscles distinguishable Central nervous system Evagination of telencephalon Differentiation of pigment in retina Connections between olfactory nerve and epithelium Layering in cortex Swelling of thalamus and hypothalamus Primary lens cells fill lens vesicle Developmental Events Examined