A birth defect caused by incomplete closure of the spine is

Which piece of equipment is used to drill holes into the cranium?

___ nerve supplies the muscles that act in adjusting the amount of light that enters the eyes.

Which is the main artery for blood supply for the brain?

A temporary stroke in which the symptoms usually resolve, however may be a sign of a future severe stroke is __________.

The ______ permits the neurosurgeon to remove large tumors from the inside out, “debulking” them quickly and effectively, without traction or manipulation and with minimal transmission of movement to adjacent normal tissues.

A spinal stenosis refers to ________ of the spinal canal.

What organ secretes erythropoietin?  

What lessens the chance that a biconcave erythrocyte gets stuck within the narrow confines of a capillary?

Which of the following is correct about sickle cell hemoglobin? Mark all that apply.