Hyperlexia They are extremely good at decoding language and thus often become very early readers. Some hyperlexic children learn to spell long words (such as "elephant") before they are two years old and learn to read whole sentences before they turn three. An fMRI study of a single child showed that hyperlexia may be the neurological opposite of dyslexia. The word hyperlexia is derived from the Greek terms "hyper" ("over") and "léxis" ("diction", "word"). Although hyperlexic children usually learn to read in a non-communicative way, several studies have shown that they can acquire reading comprehension and communicative language after the onset
Heterogeneous condition Heterogeneous condition Heterogeneous medical condition in medicine are those medical conditions which have several etiologies, like hepatitis or diabetes. Medical conditions are normally defined pathologically (liver inflammation) or clinically (excessive urination) and not etiologically, and therefore it is normal to have more than one cause for them. The word is used as an opposition to homogeneous, meaning that given a group of patients, the disease is the same for all of them. When a condition is heterogeneous, it is normally divided in endotypes. An endotype is a subtype of a condition, which is defined by a distinct functional or pathobiological