| This is your own natural stress control mechanism, known as the ultradian rhythm. |
| Still slower ultradian rhythms, with a period of 2 h, and circadian rhythms have also been observed. |
| As a result, ultradian, circadian, and other body rhythms are important under physiological and pathophysiological conditions. |
| In addition, the timing of an ultradian rhythm, the defecation cycle, is lengthened compared to wild type. |
| Prepubertal and early adolescent bipolarity differentiate from ADHD by manic symptoms, grandiose delusions, ultrarapid or ultradian cycling. |
| Serum testosterone levels exhibit ultradian and circadian variation, providing physiologic sources of biologic variability. |
