Final answer:
Craniosynostosis is an abnormality in which normal development is interrupted due to the premature closure of sutures in the skull. This condition can result in abnormal skull growth and deformity of the head.
Step-by-step explanation:
The abnormality in which normal development is interrupted due to extrinsic force is craniosynostosis. This condition occurs when the sutures in the skull close prematurely, resulting in abnormal growth of the skull and deformity of the head. Craniosynostosis can be caused by genetic factors, but the underlying cause is unknown. It is a relatively common condition, occurring in approximately 1:2000 births.