Considering the function of Coriolis force in rotation reference system, the article discusses the trajectory, radius, speed and period of conical pendulum and compares it with the conical pendulum in inertia reference system.

With three displacement sensors,an approximate algorithm derived from vector product was given to measure the pendulum angle of quasi-taper swinging movement.

Relationship among the traumatic spinal canal stenosis,location of conus medullaris,and neurologic deficits in burst fracture of the first lumbar vertebra

Aim: To study the diagnosis and treatment of ependymoma in conus medullaris and cauda equins.

Objective To explore the clinical features and surgical findings of cauda equina and conus medullaris tumors.