Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Graph displaying the peak caudad and cephalad velocities (in cm/s) in the subarachnoid space of the foramen magnum in patients with a Chiari I malformation before and after suboccipital decompression. In most patients, the caudad (systolic) and cephalad (diastolic) velocities are diminished following surgery.
