Table 1.

Ratio of the Number of Studies That Report a Significant Increas in Inflammatory Cytokines to Total Number of Studies

Type of Stress	IL-1β	TNF-α	IL-6
Acute stress
Hypothalamus	18/57	1/20	6/29
Hippocampus	16/59	10/37	8/33
Prefrontal cortex	5/13	4/17	2/15
Chronic stress
Hypothalamus	6/18	0/10	2/6
Hippocampus	65/86	45/68	32/55
Prefrontal cortex	21/37	19/35	14/26