👉 A subbrachycephalic is a medical condition that refers to a skull deformity characterized by an abnormal position of the brainstem, which is located behind the cranium. It can be caused by various factors such as trauma or birth defects, and it is usually associated with other head injuries. The subbrachycephalic deformity may involve the development of a small cranial cavity between the brainstem and skull, which is often referred to as a "subdural space".