The four major sutures are the coronal
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The four major sutures of the skull are the coronal, sagittal, lambdoid, and squamous sutures. Sutures connect the frontal, parietal, temporal, and occipital bones of the skull and allow movement during birth by acting as expansion joints that enable even growth of the bones and brain. There are also two fontanelles between the skull bones, the anterior and posterior fontanelles, which are soft spots in an infant's skull that close during the first two years of life.
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The skull is composed of 22 bones, including 8 cranial bones and 14 facial bones. The cranial bones are the frontal, occipital, ethmoid, sphenoid, and two parietal and temporal bones each. The facial bones include the vomer, mandible, two maxillae, two zygomatic, two nasal, two nasal concha, two lacrimal, and two palatine bones. Key skull features include the sagittal, coronal, lambdoidal, and squamosal sutures, as well as the orbit.
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SWERNY SKELETAL 2.pdf
The document provides an overview of the axial and appendicular skeleton. The axial skeleton consists of the skull, vertebral column, and rib cage. It describes the bones that make up the skull in detail. The functions of the skull are to protect the brain and sense organs. The vertebral column consists of vertebrae and provides structure, protection of the spinal cord, and allows for movement. The thoracic cage surrounds the heart and lungs and its bones provide attachment points for muscles. The appendicular skeleton includes the shoulder girdle and pelvic girdle bones that attach the arms and legs.
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a_4_skull.ppt
The skull is composed of 28 bones that protect the brain and provide attachment points for muscles. The cranium consists of 8 bones that form the cranial vault surrounding the brain. The facial skeleton consists of 15 irregular bones that form the face and hold the teeth. Several sutures connect the cranial bones, including sagittal, coronal, squamosal, and lambdoidal sutures. In infants, fontanelles between bones allow the skull to flex during birth and accommodate brain growth.
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The skull is composed of 22 bones that make up the cranium and face. The 8 bones of the cranium are the frontal, two parietal, occipital, two temporal, sphenoid, and ethmoid bones. Each of these bones has characteristic structures and parts that were formed through either intramembranous or endochondral ossification. The 14 bones of the face are the two zygomatic, two maxillae, two nasal, two lacrimal, vomer, two palatine, two inferior conchae, and single mandible. Together, these bones protect the brain and form cavities for sensory structures.
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Axial skeleton 2.pptx
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Osteology of the Skull by DR. KENNEDY MUNISI, MD, MMed, MSc. PhD..pptx
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The four major sutures are the coronal
- 1. The four major sutures are the coronal, sagittal, lambdoid, and squamous sutures. They connect the frontal, parietal, temporal, and occipital bones. The coronal suture joins the frontal bone to the parietal bones. The sagittal suture joins the two parietal bones to each other. The lambdoid suture joins the parietal bones to the occipital bone. The squamous suture joins the parietal bones to the temporal bones. Although the skull appears to be one large bone, there are actually several major bones that are connected together. The major bones that compose the skull of a newborn include the following: 2 frontal bones 2 parietal bones 1 occipital bone These bony plates cover the brain and are held together by fibrous material called sutures. What are sutures? Some sutures extend to the forehead, while others extend to the sides and back of the skull. One suture in the middle of the skull extends from the front of the head to the back. The major sutures of the skull include the following:
- 2. metopic suture - extends from the top of the head down the middle of the forehead, toward the nose. The two frontal bone plates meet at the metopic suture. coronal suture - extends from ear to ear. Each frontal bone plate meets with a parietal bone plate at the coronal suture. sagittal suture - extends from the front of the head to the back, down the middle of the top of the head. The two parietal bone plates meet at the sagittal suture. lambdoid suture - extends across the back of the head. Each parietal bone plate meets the occipital bone plate at the lambdoid suture. Sutures allow the bones to move during the birth process. They act like an expansion joint, allowing the bone to enlarge evenly as the brain grows and the skull expands, resulting in a symmetrically shaped head. However, if any of the sutures close too early (fuse prematurely), there may be no growth in that area. This may force growth to occur in another area or direction, resulting in an abnormal head shape. What are fontanelles? There are two fontanelles (the space between the bones of an infant's skull where the sutures intersect) that are covered by tough membranes. The fontanelles include: anterior fontanelle (Also called soft spot.) - the junction where the two frontal and two parietal bones meet. The anterior fontanelle remains soft until about 2 years of age. posterior fontanelle - the junction of the two parietal bones and the occipital bone. The posterior fontanelle usually closes first, before the anterior fontanelle, during the first several months of an infant's life.