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Orthostatic intolerance occurs in humans because standing upright is a fundamental stressor, so requires rapid and effective circulatory and neurologic compensations to maintain blood pressure, cerebral blood flow, and consciousness. When a human stands, about 750 ml of thoracic blood are abruptly translocated downward.
Standing with folded arms; Standing contrapposto, with most of the weight on one foot so that its shoulders and arms twist off-axis from the hips and legs in the axial plane; Standing at attention, upright with an assertive and correct posture: "chin up, chest out, shoulders back, stomach in", arms at the side, heels together, toes apart
Standing, also referred to as orthostasis, is a position in which the body is held in an upright (orthostatic) position and supported only by the feet. Although seemingly static, the body rocks slightly back and forth from the ankle in the sagittal plane , which bisects the body into right and left sides.
In fact, one in three adults aged 65 and over will fall each year. [5] In the case of an individual standing quietly upright, the limit of stability is defined as the amount of postural sway at which balance is lost and corrective action is required. [6]
A woman with a thigh gap. A thigh gap is a space between the inner thighs of some women when standing upright with knees touching. [1]In the 21st century, some people in the West have begun to consider the thigh gap a special feature of physical attractiveness and physical fitness in women.
This position is one in which a person is standing, feet apace, with palms forward and thumbs facing outwards. [11] Just as maps are normally oriented with north at the top, the standard body "map", or anatomical position, is that of the body standing upright, with the feet at shoulder width and parallel, toes forward.
For example, as humans are approximately bilaterally symmetrical organisms, anatomical descriptions usually use the same terms as those for other vertebrates. [59] However, humans stand upright on two legs, meaning their anterior/posterior and ventral/dorsal directions are the same, and the inferior/superior directions are necessary. [60]
Astasia-abasia refers to the inability to either stand or walk in a normal manner. Astasia refers to the inability to stand upright unassisted. Abasia refers to lack of motor coordination in walking. The term abasia literally means that the base of gait (the lateral distance between the two feet) is inconstant or unmeasurable.