Sutures of the Skull
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E. Junctions of the cranial sutures
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Sutures of the Skull
- Are the immovable fibrous joints between the bones of the skull.
A. Coronal suture : lies between the frontal bone and the two parietal bones.
B. Sagittal suture : lies between the two parietal bones.
C. Squamous (squamoparietal) suture : lies between the parietal bone and the squamous part of the temporal bone.
D. Lambdoid suture : lies between the two parietal bones and the occipital bone.
E. Junctions of the cranial sutures
- Lambda : intersection of the lambdoid and sagittal sutures.
- Bregma : intersection of the sagittal and coronal sutures.
- Pterion : a craniometric point at the junction of the frontal, parietal, and temporal bones and the great wing of the sphenoid bone.
- Asterion : a craniometric point at the junction of the parietal, occipital, and temporal (mastoid part) bones.
- Nasion : a point on the middle of the nasofrontal suture (intersection of the frontal and two nasal bones).
- Inion : most prominent point of the external occipital protuberance, which is used as a fixed point in craniometry.
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