Whether we like it or not, digital devices are everywhere. While these devices can enhance learning and build community, they can also interfere with everything from sleep to creativity. Pediatrician Michael Rich, wants to understand how—and help children and parents manage their online behavior in this ever-changing digital landscape. Get more HMS news here.
A radical new neural network design could overcome big challenges in AI
Dyslexia - Symptoms and causes - Mayo Clinic
Sexual orientation is an enduring pattern of romantic or sexual attraction or a combination of these to persons of the opposite sex or gender , the same sex or gender , or to both sexes or more than one gender, or none of the aforementioned at all. However, advances in neuroscience explain and illustrate characteristics linked to sexual orientation. Many theories concerning the development of sexual orientation involve fetal neural development, with proposed models illustrating prenatal hormone exposure, maternal immunity, and developmental instability. Other proposed factors include genetic control of sexual orientation. No conclusive evidence has been shown that environmental or learned effects are responsible for the development of non-heterosexual orientation. As of , sexual dimorphisms in the brain and behavior among vertebrates were accounted for by the influence of gonadal steroidal androgens as demonstrated in animal models over the prior few decades.
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November 1, Understanding how and when such cells switch their purpose in an embryo is an important and complex goal for developmental biologists. A recent study, led by researchers at the California Institute of Technology Caltech , provides new clues about this process—at least in the case of neural crest cells, which give rise to most of the peripheral nervous system, to pigment cells, and to large portions of the facial skeleton. According to Bronner, DNMT arranges this transition by silencing expression of the genes that promote central nervous system CNS identity, thereby giving the cells the green light to become neural crest, migrate, and do new things, like help build a jaw bone.
New neuroimaging research has found that gay, bisexual, and straight men have different brain responses to sexual stimuli. The fMRI study of 26 heterosexual, 28 bisexual, and 25 homosexual men found that sexual orientation was associated with distinct patterns of brain activation. In particular, the researchers uncovered that heterosexual and homosexual men showed different neural responses to erotic stimuli in the ventral striatum, an area of the brain associated with erotic desire. The erotic stimuli consisted of pictures of nude men, nude women, and lesbian or gay couples engaged in sexual contact.