Lie on your back with the leg you want to exercise straight. The other knee should be bent to support your lower back. Tighten the muscle on the top of your thigh and lift to the level of your other knee. Slowly lower.
While it was originally believed that most vascular malformations are present at birth (congential), cavernous malformation lesions may develop throughout the lifetime of the affected individual. Other vascular malformations are not congenital, but are caused by trauma, radiation, or other injury to the spinal cord.
Chiari I malformation is characterized by herniation of the cerebellar tonsils through the foramen magnum into the cervical spinal canal (see the images below). The cerebellar tonsils often are elongated and peglike.ote that the ectopic cerebellar tonsils are positioned snugly in the posterolateral subarachnoid space of the cervical spinal canal. Chiari I malformation is not directly associated with other congenital brain malformations, specifically myelomeningocele, which is a feature of Chiari II malformation.