The term isozephal is a term sometimes used in the visual arts to describe figures that have a part of the body, all composed at about the same level (iso– means “equal”). What part of the isocephalic body does it refer to? The width/longitude (width X 100) / longitude ratio is called the cephalic index or width index. The combined -cephalic form is a variant of -cephalon, as in the diephalon. The human nervous system develops from a small, specialized cell plate on the surface of the embryo. At the beginning of development, this cell plate forms the neural tube, a narrow shell that closes between the third and fourth week of pregnancy to form the brain and spinal cord of the embryo. Four main processes are responsible for the development of the nervous system: cell proliferation, the process by which nerve cells divide to form new generations of cells; cell migration, the process by which nerve cells move from their place of origin to the place where they will remain for life; cell differentiation, the process by which cells acquire individual properties; and cell death, a natural process in which cells die. Understanding the normal development of the human nervous system, one of the research priorities of the National Institute of Neurological Disorders and Stroke, can lead to a better understanding of head diseases. What are the words that use the combined form – cephalic? The amnion forms a small fold covered with the extreme head of the embryo, which is deeply embedded in the yolk. At the end of this stage, the total number of post-cephalic segments was established. These sample sentences are automatically selected from various online information sources to reflect the current use of the word “cephalic” The opinions expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us your feedback.

During the Bronze Age, the head index increased throughout Central and Western Europe. ANENCEPHALY is a neural tube defect that occurs when the cephalic end (head) of the neural tube does not close, usually between the 23rd and 26th day of pregnancy, resulting in the disappearance of much of the brain, skull and scalp. Infants with this disorder are born without a forebrain – most of the brain consists mainly of the brain, which is responsible for thinking and coordination. The remaining brain tissue is often exposed – not covered with bone or skin. Now, if we divide the maximum width by the maximum length and multiply the result by 100, we get what is called the skull head index. An example of a botanical term that uses -cephalic is monocephalous, which means “to carry a flower head,” such as a dandelion or domesticated sunflower. Add cephalic to one of your lists below or create a new one. The phase 1 insulin response, called the cephalic reaction, occurs even before the food is consumed. E seems to be a bit abnormal because the head area is not as clearly separated from the trunk as it is common.

The first phase is also known as the cephalic phase because it comes from the brain. The combined form -cephalic is used as a suffix meaning “to have a head or heads”. It is often used in medical and scientific terms. ECENCEPHALY is a condition in which the brain is located outside the skull. This condition is usually found in embryos as an early stage of anencephaly. As an exencephalic pregnancy progresses, nerve tissue gradually degenerates. It is unusual to find an infant who can cope with this condition because the defect is incompatible with survival. This is called the cephalic phase of insulin secretion and is due to the hypothalamic-entero-insular axis mediated by the vagus nerve1 The corresponding forms of -cephalic combined at the beginning of the words are cephalo- and cephalon-, about which you can learn more in our words that the articles use, for each form. “Cephalic.” dictionary Merriam-Webster.com, Merriam-Webster, www.merriam-webster.com/dictionary/cephalic.

Retrieved 21 September 2022. Another group of less common head diseases are cranial stenosis. Craniostenes are deformities of the skull caused by premature fusion or connection of cranial sutures. Cranial sutures are fibrous joints that connect the bones of the skull together. The nature of these malformations depends on the sutures affected. They are known as the head, stomach and intestines. Subscribe to America`s largest dictionary and get thousands of additional definitions and advanced search – ad-free! The -cephalic form comes from the Greek kephalḗ, which means “head”. NINDS health-related materials are provided for informational purposes only and do not necessarily constitute an endorsement or official position of the National Institute of Neurological Disorders and Stroke or any other federal agency.

Advice on the treatment or care of an individual patient should be obtained by consulting a physician who has examined that patient or who is familiar with that patient`s medical history. Cephalic disorders are not necessarily caused by a single factor, but can be affected by hereditary or genetic conditions, or by environmental influences during pregnancy, such as medications taken by the mother, maternal infections, or radiation exposure. Some cephalic disorders occur when cranial sutures (the fibrous joints that connect the bones of the skull) connect prematurely. Most head diseases are caused by a disorder that occurs very early in the development of the fetal nervous system. Head diseases are congenital diseases that are due to damage or abnormal development of the booming nervous system. Cephalic is a term that means “head” or “head of the body”. Congenital means that the disorder is present at and usually before birth. Although there are many congenital developmental disorders, this fact sheet briefly describes only cephalic conditions. Scientists are also focusing their efforts on understanding the complex processes responsible for the normal early development of the brain and nervous system, and how disruption of any of these processes leads to birth defects such as head disease. Understanding how genes control the migration, proliferation, differentiation and death of brain cells, and how radiation, drugs, toxins, infections and other factors disrupt these processes will help prevent many congenital neurological disorders.

Middle French cã©phalique, from the Latin cephalicus, from the Greek kephalikos, from the head of kephalÄ; similar to the old Skull of The High German Gebal, the Old Norse Gafl gable, the Tocharian Head A ÅpÄl What are diseases of the head? What are the different types of head diseases? What are the other less common cephaly? What research is underway? Where can I get more information? Porencephaly most likely has a number of different, often unknown, causes, including lack of brain development and destruction of brain tissue. The presence of porencephalic cysts can sometimes be detected by transillumination of the skull in early childhood. The diagnosis can be confirmed by computed tomography, MRI or ultrasound. Of the thirty-two men, nine are brachycephalic – that is, their head index is greater than 80; twenty of the thirty-two are midphalic, with a cephalic index between 75 and 80; And only three are dolichozephal – that is, the cephalic index is less than 75. The first part of the monocephalus may seem familiar to you. Mono– means “one, single, alone”. The second part of the word, -cephalic, means “to have a head”, as we have seen. Monocephalus literally means “to have one head”. ACEPHALY literally means absence of the head. This is a much rarer condition than anencephaly. The acephalic fetus is a parasitic twin attached to an otherwise intact fetus.

The acephalic fetus has a body, but it lacks a head and a heart; The neck of the fetus is attached to the normal twin. Blood flow to the acephal fetus is provided by the twin`s heart. The acephalic fetus cannot exist independently of the fetus to which it is attached. Megalencephaly, also called macrephaly, is a condition in which there is an exceptionally large, heavy and usually defective brain. By definition, brain weight is above average for the age and sex of the infant or child. The enlargement of the head may be evident at birth or the head may become unusually large in the first years of life. Between the enlargements of the head and the swelling of the tail is the rudimentary trunk of the embryo. The word “cephalic” comes from the Middle French “cephalic”, from the Latin “cephalicus”, from the Greek “kephalikos”, which means head. Medterms Medical Dictionary List A-Z / Cephalic Definition. In general, the life expectancy of people with microcephaly is reduced and the prognosis for normal brain function is poor.

The prognosis varies depending on the presence of associated abnormalities. Most people with iniencephaly have other associated abnormalities such as anencephaly, cephalocele (a disorder in which part of the contents of the skull protrudes from the skull), hydrocephalus, cyclopsia, absence of a lower jaw (mandibular bone), cleft lip and palate, cardiovascular disease, diaphragmatic hernia and gastrointestinal malformation. The disorder is more common in women. Hydranencephaly is an extreme form of pore cephaly (a rare disease discussed later in this fact sheet and characterized by a cyst or cavity in the hemispheres of the brain) and can be caused by a vascular insult (such as a stroke) or injuries, infections or traumatic disorders after the 12th week of pregnancy. The outlook for children with hydranencephalus is generally poor, and many children with this disorder die before the age of 1 year. However, in rare cases, children with hydranencephaly can survive for several years or more. The cause of anencephaly is unknown.