Discussion of Recent Deterrence Studies. The Criminal Justice Legal Foundation has collected many recent deterrence studies, including ones by Hashem Dezhbakhsh, Paul H. Rubin, Joanna M. Shepherd, H. Naci Mocan & R. Kaj Gittings and others claiming a deterrent effect to the death penalty. These studies may be found here.
Spinal headaches are caused by leakage of spinal fluid through a puncture hole in the tough membrane (dura mater) that surrounds the spinal cord. This leakage decreases the pressure exerted by the spinal fluid on the brain and spinal cord, which leads to a headache. Spinal headaches typically appear within 48 hours after a spinal tap or spinal anesthesia.
1 Tension headaches can be caused by physical or psychological stress. Physical activity that results in tension in the neck and shoulders can result in a tension headache. Mental stress due to lack of sleep, work stress, or decreased caffeine use can also lead to a tension headache and nausea.  Other Causes.