As humans grow from children into adults, they pass through a stage called adolescence. Adolescence is time of major social, environmental, and biological change in person’s life. The start puberty, which often happens around the teenage years, an important period human physical emotional development. In addition to more obvious bodily changes that happen during this time, adolescent’s brain al...

To summarize the maintenance of homeostasis in our body terms signal transduction, there are two major axes: autonomic nervous system and hormones. The system, one peripheral nerves, secretes neurotransmitters such as norepinephrine acetylcholine to affect target organs quickly efficiently. Hormones can be viewed signals that trigger larger changes DNA level after they secreted into blood reach...

background: hormonal changes as a factor influencing the emotional state of women have an important role in the incidence of suicide. the aim of this study is to investigate changes in fsh-lh, estrogen, and progesterone hormones in women attempting suicide by drugs and chemicals. methods: in this cross-sectional study, women of reproductive diagnosed with drug and chemical poisoning who were ho...

the study on biochemical changes in brain tissue indicates that there are considerable variations in metabolism of energy in this tissue within the first three weeks of life. this phenomenon coincides with the increase of brain energy during that period of life. there are, indeed, various factors, involved in the changing process. hormones and thyroid hormones in particular are of the most impo...

Introduction: Leptin and Ghrelin are hormones that have been discovered in the last decade and were shown to be involved in appetite and metabolism regulation and body weight. Thyroid hormones are also    involved in general metabolism and changes in their circulating levels bring about changes in appetite and body weight. Results of animal and human studies regarding Leptinlevel and its re...

due to the increasing presence of electromagnetic radiation in advanced societies, investigation of the effects of this radiation on humans has attracted the interest of many researchers. the non- ionizing radiation can induce numerous effects through biomolecules in the tissue and cells. in the current study, effects of 12 hz electromagnetic waves investigated on neuronal hormone levels in rat...

to determine the prevalence of pituitary hormone deficiencies after moderate traumatic brain injury (tbi). we conducted a prospective cohort and included 75 patients with moderate tbi with gcs between 9 and 13 who referred to emergency department of shariati hospital, tehran/iran, during 2004-2007. pituitary hormones were assessed 3 and 6 months after injury. in 3rd month post-injury, 39 cases ...