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Handedness And Sexual Orientation
A relationship between handedness and sexual orientation has been suggested by a number of researchers, who report that heterosexual individuals are somewhat more likely to be right-handed than are homosexual individuals. The relationship between handedness and sexual orientation has been suggested within both sexes and may reflect the biological etiology of sexual orientation; work by Ray Blanchard has linked the relationship to the fraternal birth order effect, which suggests that a man with several older biological brothers is more likely to be homosexual. The psychologist Chris McManus and a team of researchers weighed in on the relationship to homosexuality and concluded: Studies Lalumière ''et al''., 2000 meta-analysis Lalumière ''et al''. conducted a meta-analysis of 20 studies with a total of 6,987 homosexual and 16,423 heterosexual participants. They found that homosexual men had a 34% greater odds of not being right-handed, and homosexual women ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handedness
In human biology, handedness is an individual's preferential use of one hand, known as the dominant hand, due to and causing it to be stronger, faster or more Fine motor skill, dextrous. The other hand, comparatively often the weaker, less dextrous or simply less subjectively preferred, is called the non-dominant hand. In a study from 1975 on 7,688 children in US grades 1–6, left handers comprised 9.6% of the sample, with 10.5% of male children and 8.7% of female children being left-handed. Overall, around 90% of people are right-handed. Handedness is often defined by one's writing hand. It is fairly common for people to prefer to do a particular task with a particular hand. Cross-dominance, Mixed-handed people change hand preference depending on the task. Not to be confused with handedness, ambidexterity describes having equal ability in both hands. Those who learn it still tend to favor their originally dominant hand. Natural ambidexterity (equal preference of either hand) d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 contiguous states border Canada to the north and Mexico to the south, with the semi-exclave of Alaska in the northwest and the archipelago of Hawaii in the Pacific Ocean. The United States asserts sovereignty over five Territories of the United States, major island territories and United States Minor Outlying Islands, various uninhabited islands in Oceania and the Caribbean. It is a megadiverse country, with the world's List of countries and dependencies by area, third-largest land area and List of countries and dependencies by population, third-largest population, exceeding 340 million. Its three Metropolitan statistical areas by population, largest metropolitan areas are New York metropolitan area, New York, Greater Los Angeles, Los Angel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Orientation And Medicine
Timeline of events related to sexual orientation and medicine 19th century 1886 *Richard Freiherr von Krafft-Ebing, a German psychiatrist, published a study of sexual perversity: Psychopathia Sexualis. 20th century 1948 *''Sexual Behavior in the Human Male'', the first "Kinsey Report", was published by Alfred Kinsey. 1953 *''Sexual Behavior in the Human Female'', the second "Kinsey Report", was published by Alfred Kinsey. 1957 *The Society for the Scientific Study of Sexuality was founded to encourage the rigorous systematic study of sexuality. 1973 *The American Psychiatric Association voted to remove homosexuality from the Diagnostic and Statistical Manual of Mental Disorders (DSM). 1975 * The Gay and Lesbian Health Caucus of the American Public Health Association is founded. 1977 *The Bay Area Physicians for Human Rights was founded in San Francisco as a support group for gay and lesbian medical students, residents, and other health care providers. The group claims to b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motor Skills
A motor skill is a function that involves specific movements of the body's muscles to perform a certain task. These tasks could include walking, running, or riding a bike. In order to perform this skill, the body's nervous system, muscles, and brain have to all work together. The goal of motor skill is to optimize the ability to perform the skill at the rate of success, precision, and to reduce the energy consumption required for performance. Performance is an act of executing a motor skill or task. Continuous practice of a specific motor skill will result in a greatly improved performance, which leads to motor learning. Motor learning is a relatively permanent change in the ability to perform a skill as a result of continuous practice or experience. A fundamental movement skill is a developed ability to move the body in coordinated ways to achieve consistent performance at demanding physical tasks, such as found in sports, combat or personal locomotion, especially those unique ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transgender
A transgender (often shortened to trans) person has a gender identity different from that typically associated with the sex they were sex assignment, assigned at birth. The opposite of ''transgender'' is ''cisgender'', which describes persons whose gender identity matches their assigned sex. Often, transgender people desire medical assistance to Gender transition, medically transition from one sex to another; those who do may identify as transsexual.. "The term ''transsexual'' was introduced by Cauldwell (1949) and popularized by Harry Benjamin (1966) [...]. The term ''transgender'' was coined by John Oliven (1965) and popularized by various transgender people who pioneered the concept and practice of transgenderism. It is sometimes said that Virginia Prince (1976) popularized the term, but history shows that many transgender people advocated the use of this term much more than Prince." Referencing .. "The use of terminology by transsexual individuals to self-identify varies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prenatal Hormones And Sexual Orientation
The hormonal theory of sexuality holds that, just as exposure to certain hormones plays a role in fetal sex differentiation, such exposure also influences the sexual orientation that emerges later in the individual. Prenatal hormones may be seen as the primary determinant of adult sexual orientation, or a co-factor. Sex-typed behavior The hormonal theory of sexuality holds that, just as exposure to certain hormones plays a role in fetal sex differentiation, such exposure also influences the sexual orientation that emerges later in the adult. Differences in brain structure that come about from chemical messengers and genes interacting on developing brain cells are believed to be the basis of sex differences in countless behaviors, including sexual orientation. Prenatal factors that affect or interfere with the interaction of these hormones on the developing brain can influence later sex-typed behavior in children. This hypothesis is originated from experimental studies in non-hum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laterality
The term laterality refers to the preference most humans show for one side of their Human body, body over the other. Examples include Handedness, left-handedness/right-handedness and left/right-footedness; it may also refer to the primary use of the left or right hemisphere in the brain. It may also apply to animals or plants. The majority of tests have been conducted on humans, specifically to determine the effects on language. Human Most humans are right-handed. Many are also right-sided in general (that is, they prefer to use their right human eye, eye, right foot and right ear if forced to make a choice between the two). The reasons for this are not fully understood, but it is thought that because the left cerebral hemisphere of the brain controls the right side of the body, the right side is generally stronger; it is suggested that the Lateralization of brain function, left cerebral hemisphere is dominant over the right in most humans because in 90–92% of all humans, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Handedness
In human biology, handedness is an individual's preferential use of one hand, known as the dominant hand, due to and causing it to be stronger, faster or more Fine motor skill, dextrous. The other hand, comparatively often the weaker, less dextrous or simply less subjectively preferred, is called the non-dominant hand. In a study from 1975 on 7,688 children in US grades 1–6, left handers comprised 9.6% of the sample, with 10.5% of male children and 8.7% of female children being left-handed. Overall, around 90% of people are right-handed. Handedness is often defined by one's writing hand. It is fairly common for people to prefer to do a particular task with a particular hand. Cross-dominance, Mixed-handed people change hand preference depending on the task. Not to be confused with handedness, ambidexterity describes having equal ability in both hands. Those who learn it still tend to favor their originally dominant hand. Natural ambidexterity (equal preference of either hand) d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fraternal Birth Order And Male Sexual Orientation
Fraternal birth order, also known as the older brother effect, has been correlated with male sexual orientation, with a significant volume of research finding that the more older brothers a male has from the same mother, the greater the probability he will have a homosexual orientation. Ray Blanchard and Anthony Bogaert first identified the association in the 1990s and named it the fraternal birth order effect. Scientists have attributed the effect to a prenatal biological mechanism, since the association is only present in men with older biological brothers, and not present among men with older step-brothers and adoptive brothers. The mechanism is thought to be a maternal immune response to male fetuses, whereby antibodies neutralize male Y-proteins thought to play a role in sexual differentiation during development. This would leave some regions of the brain associated with sexual orientation in the 'female typical' arrangement – or attracted to men. The effect becomes stro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biology And Sexual Orientation
The relationship between biology and sexual orientation is a subject of ongoing research. While scientists do not know the exact cause of sexual orientation, they theorize that it is caused by a complex interplay of Genetics, genetic, hormonal, and Environment and sexual orientation, environmental influences. However, evidence is weak for hypotheses that the postnatal social environment impacts sexual orientation, especially for males. Biological theories for explaining the causes of sexual orientation are favored by scientists. These factors, which may be related to the development of a sexual orientation, include genes, the early uterine environment (such as Prenatal hormones and sexual orientation, prenatal hormones), and Human brain, brain structure. While the Evolution, evolutionary explanation for heterosexuality in organisms that Sexual reproduction, reproduce sexually is straightforwardly understood to be a psychological adaptation resulting from Fitness (biology), greater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autism And LGBT Identities
Current research indicates that autistic people have higher rates of LGBTQ identities and feelings than the general population. A variety of explanations for the increased prevalence of LGBTQ identities have been proposed, such as prenatal hormonal exposure, which has been linked with sexual orientation, gender dysphoria and autism. Alternatively, autistic people may be less reliant on social norms and thus are more open about their orientation or gender identity. A narrative review published in 2016 stated that while various hypotheses have been proposed for an association between autism and gender dysphoria, they lack strong evidence. In a special issue of ''Autism in Adulthood'', editors note that research support for autistic sexual minority studies is lacking. Autism and sexual orientation General interest in sexuality Early claims that autistic people lack a sex drive or desire for sexuality have been regarded as an inaccurate stereotype. These claims were a result of meth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
