Motor Speech Disorders

Motor Speech Disorders - Term Definition Pre embryonic...

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Term: Pre embryonic stage Definition: Fertilization through 2 to 3 weeks. Germ cel layers are established. Ectoderm, mesoderm, endoderm. Notochord develops, that turns into vertebral column, ribs, sternum, skull. Term: Embryonic stage Definition: 3-4 weeks through eight weeks. All major organ systems begin. Principal components of the face develop. Humanlike appearance. At seven weeks tastebuds develop. Critical period. Exposure can cause birth defects. drugs infections toxins. Term: Fetal development Definition: Nine weeks through birth. Genetic and chromosomal factors are what we look at in terms of defects at this age. Vulnerable to injury from the environment such as infections drugs radiation and mechanical compromise. Any change in the fetus can result in malformations of organ systems. Rapid growth and completion of organ differentiation. Head is almost half of the length. Less susceptible to death. Gains substantial weight. Changes are less dramatic then the embryonic state but necessary to prepare it before extrauterine survival.
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Term: Ectoderm Definition: Tissues:Skin Hair nails lens inner ear teeth enamel pituitary gland. Organ systems: Central nervous system bring spinal cord meninges peripheral nervous system Term: Mesoderm Definition: Tissues: Cartilage, bone, connected tissues, striated/smooth muscles. Organs: Heart, kidneys, gonads, spleen. Term: Endoderm Definition: Tissues: Digestive/respiratory, eustachian tube, middle your cavity, thyroid/parathyroid. Organs: Liver/ pancreas. Term: Fetal Oral Motor Development Definition: At nine weeks there is mouth and lower face movement. 23 to 24 sucking begins. 24 to 25 rooting reflex begins. 26 to 27 gag reflex. 26 to 29 lungs breathe air with difficulty. 27 to 28 swallow reflex. 28 phasic bite reflex. 32 rooting reflex present. 24 to 26 suck swallow breathing development- can begin oral feeding.
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Term: Placenta placement Definition: Normal placenta is located in the upper third of the uterus. Placenta previa the placenta is abnormally placed so that it lies over the cervical opening. Abruptio placenta a normally placed placenta becomes partially separated from the uterine wall in the second or third trimester and bleeding results. Term: Gestation Definition: Preterm less than 37 weeks. Full term 37 to 42 weeks. Postterm 42 weeks or above. Term: Birth weight Definition: Macrosomia is more than 4000 grams 8.8 lbs. Normal birth weight 2500-3999 lbs about 7.5 lbs. low birth weight 1500 to less than 2500 g. Very low birth weight less than 1500 g. birth weight is considered one of the most important predictors of an infant's health and survival.
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