cranial sutures

2. The cranial sutures are fibrous joints connecting
the bones of the skull. To the unknowing individual
these shallow grooves may look like fractures. In
fact the intricate windy lines of these thin lines
mark the adherence between the bones and the
growth and closure of the cranial fontanelles.
The dense fibrous tissue that connects the sutures
is made mostly out of collagen. These joints are
fixed, immovable, and they have no cavity. They
are also referred to as the synarthroses. In
fetal skull the sutures are wide and allow slight
movement during birth, but later they become rigid
and fixed just like in the adults.

5.  Frontonasal suture - between the frontal bone
and nasal bones
 Frontozygomatic suture - between the frontal
bone and zygomatic bone
 Zygomaticomaxillary suture - between
zygoma and the maxilla
 Intermaxillary suture - between two maxilla
 Metopic suture - found in children; on the
midline of the frontal bone

6.  Sagittal suture - between two parietal bones
 Lambdoid suture - between the parietal bone
and occipital bone
 Lambda - convergence of the sagital and
lambdoid suture (resembles to a greek letter
'lambda')

7.  Coronal suture - between the frontal bone
and the parietal bone
 Bregma - convergence of the saggital and
coronal sutures

8.  Squamous suture - between the parietal bone
and temporal bone
 Sphenofrontal suture - between the frontal
bone and sphenoid bone
 Sphenoparietal suture - between the
sphenoid bone and parietal bone
 Occipitomastoid suture - between the
occipital bone and mastoid process of the
temporal bone
 Temporozygomatic suture - between the
temporal bone and zygomatic bone

9.  Median palatine suture - between the hotizontal
plates of the palatines
 Transverse palatine suture - between the palatine
process of the maxillary bone and the palatine
bone
 Petro-occipital suture - between the occipital
bone and petrous part of the temporal bone
 Spheno-occipital suture - between the sphenoid
bone and occipital bone
 Petrosquamous suture - between the petrous and
squamous parts of the temporal bone
 Petrotympanic suture - between the
temporomandibular joint and the tympanic cavity