Craniovertebral junction abnormalities refer to structural issues at the area where the skull meets the spine. This region is crucial for supporting the head and allowing movement. Common conditions include Chiari malformation, atlantoaxial instability, and basilar invagination, which can lead to neurological symptoms and physical limitations. These abnormalities can result from congenital factors, trauma, or degenerative diseases. Diagnosis typically involves imaging techniques like MRI or CT scans. Treatment options may include observation, physical therapy, or surgical intervention, depending on the severity and symptoms experienced by the patient.