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In obstetrics, a cephalic presentation or head presentation or head-first presentation is a situation at childbirth where the fetus is in a longitudinal lie and the head enters the pelvis first; the most common form of cephalic presentation is the vertex presentation, where the occiput is the leading part (the part that first enters the birth canal). [1]
Shoulder presentations are uncommon (about 0.5% of births) [1] since, usually, toward the end of gestation, either the head or the buttocks start to enter the upper part of the pelvis, anchoring the fetus in a longitudinal lie. It is not known in all cases of shoulder presentation why the longitudinal line is not reached, but possible causes ...
Like many medical terms, 'trigonocephaly' is derived from Greek, and indicates the head in question is triangular in shape. A facial feature of metopic synostosis is hypotelorism ; in the frontal view, it can be seen that the width between the eyes is smaller than usual.
Meaning Origin language and etymology Example(s) capill-of or pertaining to hair Latin capillus, hair capillus: capit-pertaining to the head as a whole Latin caput, capit-, the head capitation, decapitation carcin-cancer: Greek καρκίνος (karkínos), crab carcinoma: cardi-of or pertaining to the heart: Greek καρδία (kardía), heart ...
Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE. "Say" for EG, used to mean "for example". More obscure clue words of this variety include: "Model" for T, referring to the Model T.
"Caudal" means "towards the tail (Latin cauda"), but not "towards the back of the cranial cavity", which is "posterior" (behind, in ordinary motion). The rostro-caudal axis of the human central nervous system (magenta in the diagram) makes a near 90° bend at the level of the midbrain and continues through the brain-stem and spinal cord.
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In obstetrics, asynclitic birth, or asynclitism, refers to the malposition of the fetal head in the uterus relative to the birth canal. [1] Many babies enter the pelvis in an asynclitic presentation, but in most cases, the issue is corrected during labor. [2] Asynclitic presentation is not the same as shoulder presentation, where the shoulder ...