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Body schema is an organism's internal model of its own body, including the position of its limbs. The neurologist Sir Henry Head originally defined it as a postural model of the body that actively organizes and modifies 'the impressions produced by incoming sensory impulses in such a way that the final sensation of body position, or of locality, rises into consciousness charged with a relation ...
The biology of sexual orientation has been studied in detail in several animal model systems. In the common fruit fly Drosophila melanogaster , the complete pathway of sexual differentiation of the brain and the behaviors it controls is well established in both males and females, providing a concise model of biologically controlled courtship ...
Squatting is a posture where the weight of the body is on the feet (as with standing) but the knees and hips are bent. In contrast, sitting, involves taking the weight of the body, at least in part, on the buttocks against the ground or a horizontal object such as a chair seat. The angle between the legs when squatting can vary from zero to ...
[1] [2] The ultimate causes and mechanisms of sexual orientation development in humans remain unclear and many theories are speculative and controversial. However, advances in neuroscience explain and illustrate characteristics linked to sexual orientation. Studies have explored structural neural-correlates, functional and/or cognitive ...
In human anatomy, the anatomical planes are defined in reference to a body in the upright or standing orientation. A transverse plane (also known as axial or horizontal plane) is parallel to the ground; it separates the superior from the inferior, or the head from the feet.
The body behind the head compensates the asymmetric body orientation in the opposite direction, by turning to the right. (See schema.) Due to these oppositely directed compensations of the anterior head and the rest of the body, the animal becomes twisted. [10] The optic tract grows from the retina to the optic tectum.
[11] [12] [13] Although scientists favor biological models for the cause of sexual orientation, [11] they do not believe that the development of sexual orientation is the result of any one factor. They generally believe that it is determined by a complex interplay of biological and environmental factors , and is shaped at an early age.
Consequently, many feminists consider sex to only be a matter of biology and not a social construction. [ 108 ] [ 109 ] Gayle Rubin , for example, defines her influential concept of the sex/gender system as "the set of arrangements by which a society transforms biological sexuality into products of human activity”.