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This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal.
In obstetrics, position is the orientation of the fetus in the womb, identified by the location of the presenting part of the fetus relative to the pelvis of the mother. Conventionally, it is the position assumed by the fetus before the process of birth, as the fetus assumes various positions and postures during the course of childbirth .
In an occiput posterior position, labor becomes prolonged, and more operative interventions are deemed necessary. [4] The prevalence of the persistent occiput posterior is given as 4.7%. [4] The vertex presentations are further classified according to the position of the occiput, both right, left, or transverse and anterior or posterior:
During sexual intercourse in the missionary position, the tip of the penis may reach the anterior fornix, while in the rear-entry position it may reach the posterior fornix. [1] The anterior fornix is also called the a-spot, an analogue to the g-spot (Gräfenberg spot), which is closer to the vaginal opening, and also on the anterior side of ...
Anterior axillary line: A vertical line on the anterior torso marked by the anterior axillary fold. Midaxillary line: A vertical line passing through the apex of the axilla. Posterior axillary line: A vertical line passing through the posterior axillary fold. Scapular line: A vertical line passing through the inferior angle of the scapula.
Parallel are the anterior axillary line, which passes through the anterior axillary skinfold, and the posterior axillary line, which passes through the posterior axillary skinfold. The mid-clavicular line , a line running vertically down the surface of the body passing through the midpoint of the clavicle .
Posterior The direction toward the back of an individual's head, as opposed to anterior, which refers to the directions toward an individual's lips. The term posterior teeth refers to premolars and molars, as opposed to incisors and canines, which are anterior teeth. [1] [5] Proximal The surfaces of teeth that normally lie adjacent to another ...
Sacrum posterior (SP)—the buttocks face posteriorly. Shoulder presentations with transverse lie are classified into four types, based on the location of the scapula (shoulder blade). This presentation needs to be delivered by cesarean section. Left scapula-anterior (LSA) Right scapula-anterior (RSA) Left scapula-posterior (LSP)