Etiology
Dyscalculia is a neurologically based disorder of mathematical abilities. It originates as a genetic or congenital disorder of the brain and causes a discrepamcy between an individual's general cognitive level and mathematical abilities.
Types of Dyscalculia:
Lexical Dyscalculia- understand mathematical concepts when talking about them, but has difficulty reading symbols such as numerals, and cannot understand them when they occur in number sentences or equations.
Graphical Dyscalculia- difficulties with writing mathematical symbols, including but not limited to numbers.
Verbal Dyscalculia- difficulty with talking about mathematical concepts or relationships.
Ideognistic Dyscalculia- has trouble with tasks that require an understanding of mathematical ideas and relationships, such as identifying which sequence of numbers is larger to smaller.
Practognostic Dyscalculia- difficulty translating their abstract mathematical knowledge into real-world actions or procedures.
Operational Dyscalculia- difficulty with performing mathematical operations or calculations.