DEMENTIA has evolved into many different forms of cognitive deficit, and the "atypical" forms of the disease are starting to gain more recognition. These types of cognitive decline, however, tend to ...

Primary progressive aphasia (PPA) is a clinical syndrome caused by selective neurodegeneration of the language-dominant cerebral hemisphere, thus affecting the language network The language disorder ...

Primary progressive aphasia (PPA) is a neurological condition that affects a person’s ability to communicate. PPA has three subtypes. Damage due to frontotemporal dementia or Alzheimer’s disease is ...

Variant syndromes of Alzheimer disease (AD), led by deficits that extend beyond memory dysfunction, are of considerable clinical and neurobiological importance. Such syndromes present major challenges ...