Accelerated Evolution of the ASPM Gene Controlling Brain Size Begins Prior to Human Brain Expansion
- Brains under pressure. Casci, Tanita // Nature Reviews Genetics;Nov2005, Vol. 6 Issue 11, p803
The article focuses on a research which discovered the two genes that regulate brain size. Microcephalin and abnormal spindle-like microcephaly (ASPM) associated genes have been under strong selective pressure in the human evolutionary lineage since humans split off from the chimpanzee lineage....
- Microcephaly: a radiological review. Tarrant, Ailbhe; Garel, Catherine; Germanaud, David; de Villemeur, Thierry Billette; Mignot, Cyril; Lenoir, Marion; le Pointe, Hubert Ducou // Pediatric Radiology;Aug2009, Vol. 39 Issue 8, p772
Microcephaly results from inadequate brain growth during development. It may develop in utero, and therefore be present at birth, or may develop later as a result of perinatal events or postnatal conditions. The aetiology of microcephaly may be congenital (secondary to cerebral malformations or...
- microcephalia. // Taber's Cyclopedic Medical Dictionary;2005, p1357
A definition of the term "microcephalia" is presented, which means microcephaly. The reference entry is from the "Taber's Cyclopedic Medical Dictionary," published by F.A. Davis Co. The pronunciation of the term is also provided.
- microcephalus. // Taber's Cyclopedic Medical Dictionary;2005, p1357
A definition for the term "microcephalus" is presented. The term refers to individual with an exceptionally small head. The reference entry is from the "Taber's Cyclopedic Medical Dictionary," published by F.A. Davis Co. The pronunciation of the word is also presented.
- Extreme Microcephaly With Agyria-Pachygyria, Partial Agenesis of the Corpus Callosum, and Pontocerebellar Dysplasia. Sztriha, L�szl�; Johansen, Johan G.; Al-Gazali, Lihadh I. // Journal of Child Neurology;Feb2005, Vol. 20 Issue 2, p170
A 1-year-old boy with extreme microcephaly and a complex brain malformation is reported. Magnetic resonance imaging revealed an abnormal gyral pattern with features of the agyria-pachygyria spectrum, partial agenesis of the corpus callosum, severely hypoplastic posterior cerebellar vermis, and...
- microcephaly. Peters, Michael // BMA A-Z Family Medical Encyclopedia;2004, p505
An encyclopedia entry for "microcephaly" is presented. It refers to an abnormally small head that is associated with learning difficulties. The condition may be the result of certain chromosomal abnormalities and may occur if the brain is damaged before or during birth, or if it is injured or...
- nanocephaly. // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p1539
An encyclopedia entry for the term "nanocephaly" is presented.
- It's a hobbit� no, it's a human� no, it's a hobbit. // New Scientist;10/14/2006, Vol. 192 Issue 2573, p18
This article focuses on the conflicts related to hobbit, a human fossil. It lived 18,000 years ago on the Indonesian island of Flores. Some scientists say that it is a stone-age human with a mild form of microcephaly which results in less developed brain and small stature. They don't believe in...
- microcephaly. // Taber's Cyclopedic Medical Dictionary (2009);2009, Issue 21, p1461
A definition of the medical term "microcephaly," which refers to the abnormal smallness of head often seen in mental retardation, is presented.