Holoprosencephaly

Sorry, no news articles match your request. Your search criteria may be too narrow.

Holoprosencephaly (HPE, once known as arhinencephaly) is a cephalic disorder in which the prosencephalon (the forebrain of the embryo) fails to develop into two hemispheres. Normally, the forebrain is formed and the face begins to develop in the fifth and sixth weeks of human pregnancy. Hox genes, which guide placement of embryonic structures, fail to activate along the midline of the head, allowing structures that are normally paired on the left and right to merge. The condition also occurs in other species, as with Cy, the Cyclops kitten.

The condition can be mild or severe. According to the National Institute of Neurological Disorders and Stroke (NINDS), "in most cases of holoprosencephaly, the malformations are so severe that babies die before birth.

When the embryo's forebrain does not divide to form bilateral cerebral hemispheres (the left and right halves of the brain), it causes defects in the development of the face and in brain structure and function.

In less severe cases, babies are born with normal or near-normal brain development and facial deformities that may affect the eyes, nose, and upper lip.

This text uses material from Wikipedia licensed under CC BY-SA

Latest Spotlight News

Stroke damage mechanism identified

Researchers have discovered a mechanism linked to the brain damage often suffered by stroke victims—and are now searching for drugs to block it.

"Body recognition" compares with fingerprint ID

(Medical Xpress)—University of Adelaide forensic anatomy researchers are making advances in the use of "body recognition" for criminal and missing persons cases, to help with identification when a face ...

Berberine compound may play role in treating obesity

(Medical Xpress)—Weight-gain warnings are especially uncomfortable during holiday seasons with all the oversized and double helpings of calorie-rich pies, creamy dips and savory holiday stuffings. Nonetheless, ...