Injury during birth, head trauma, vitamin A toxicity, separated or malformed sutures, application of pressure, or rare congenital conditions can cause indentations in the skull, according to Healthline. When one of the skull's bones cracks, the depressed skull fracture sometimes dents inward, according to Drugs.com.Know More
As children develop, the six bony plates in the skull normally fuse together to form a suture, strong and flexible tissues, at the edges of the plates, according to Healthline. In rare cases, the sutures separate, causing large gaps in the skull that sometimes form an indentation or bulging area, most notably on the top of the head. Hypervitaminosis A is toxic levels of vitamin A that in children and infants can cause softening of the skull bone and bulging of the soft spot at the top of the head.
Positional plagiocephaly, prolonged pressure to the skull while in the uterus or during birth, is the most common cause of skull deformities in children, according to the Craniofacial Center. A less common cause of dents and bulges in the skull is craniosynostosis, in which one or more of the cranial sutures prematurely fuses together. Though the sutures that connect the skull bones cannot be pulled apart once formed, injury or trauma can cause misalignment of the cranial plates, leading to indentations and bumps in the skull, notes Van Family Chiropractic and Wellness Center.Learn more about Bones
Flat bones in the human body include the ribs, sternum (breastbone), scapula (shoulder blade), pelvic girdle and many of the 29 bones that make up the skull. Flat bones act as protection for essential organs or as attachment points for major muscle groups.Full Answer >
Rutgers University explains that the axial skeleton consists of the skull, mandible, sternum, sacrum and ribs. These bones combine to form the axis of the entire skeleton, which is why they are collectively called the axial skeleton.Full Answer >
BBC states that the only movable joint on the skull is part of the mandible, or the lower jaw bone. According to the University of Washington School of Medicine, the joint formed around the mandible is known as the temporomandibular joint.Full Answer >
According to About.com, the odontoid process serves as a pivot point for the skull and first cervical vertebrae, which allows the head and neck to rotate. The odontoid process is a projection that grows off the front portion of the second cervical vertebrae, which is also called the axis.Full Answer >