Low testosterone can also affect mood and mental health. As men age, testosterone levels naturally decline. One particularly concerning aspect of steroid abuse is its potential impact on brain plasticity and neurogenesis – the brain’s ability to form new neurons and neural connections. The problems arise when there’s an imbalance, particularly when testosterone levels are artificially elevated to supraphysiological levels. This occurs when brain cells are overactivated by neurotransmitters, leading to cell death. It’s like unleashing a horde of microscopic vandals in your brain’s neighborhood. Excessive testosterone can increase the production of reactive oxygen species (ROS), essentially free radicals that can damage cellular structures. Picture your brain cells as delicate flowers in a garden. Speaking of mood, did you know that there might be a connection between brain tumors and certain mood-related issues? This intricate interplay helps explain why hormonal fluctuations can have such profound effects on mood and behavior. Other factors, such as thyroid function, can also play a significant role. The key lies in maintaining balanced, healthy levels of testosterone. So, how do we navigate this complex terrain of testosterone and brain health? However, it’s important to note that this research is still ongoing, and more studies are needed to fully understand these potential benefits. Testosterone has been shown to promote the growth of new neurons, support the health of existing neurons, and even potentially protect against neurodegenerative diseases like Alzheimer’s. In line with these findings is the lack of an association between actual salivary testosterone levels and mental rotation in men and women (Puts et al., 2010). Not surprisingly, observational studies have focused on the association between testosterone and spatial abilities. At least in one small study, depressive women had higher testosterone (Weber et al., 2000). Similarly, in women testosterone concentrations are lower in depressive patients when compared to healthy controls (Kumsar et al., 2014). Nevertheless, it is only one of many biological factors potentially responsible for the sex differences in depression. It has been shown that prenatal and neonatal testosterone affects stress coping and the effects of stress on learning abilities, at least in rodents (Shors and Miesegaes, 2002). This effect might be mediated by the organizational effect of testosterone on brain structures such as amygdala or hippocampus (Ackermann et al., 2012). Similarly to other behavioral measures memory will be influenced also by prenatal concentrations of testosterone (Bull et al., 2010). At least in men, it has been demonstrated that moderate dosing resulted in improved memory, but not low and very high increases of testosterone (Cherrier et al., 2007). It seems that the effect of testosterone is dose-dependent and could be curvilinear even within sexes. Readers interested in sex differences and brain structures might find the needed information in the recently published focused review (Filova et al., 2013). Testosterone has also been intensively studied in relation to sex differences and behavioral functions. Some of these may be socially induced, but scientists have showed on intact animals that other factors such as genetics and gender itself are mostly responsible forthe sex differences in behavior and cognition. But it’s not just about cognitive function. While we’ve spent some time discussing the potential dangers of excessive testosterone, it’s equally important to address the other end of the spectrum – testosterone deficiency. It’s a reminder that brain health is influenced by multiple factors, and a holistic approach to health is crucial. In addition, blockade of the dihydrotestosterone transformation to 3-alpha androstanediol by a 3-alpha hydroxysteroid dehydrogenase inhibitor prevented the anxiolysis (Frye and Edinger, 2004). This suggests that the association between testosterone and anxiety might not be linear. On the other hand, flutamide alone had anxiolytic effects in the open field. From all behavioral parameters, the anxiety seems to be most sensitive to testosterone.
