Lateralized+Temporal-Sequential+Function

A side effect of lesions localized to the inferior parietal lobule is a disruption of visual-spatial functioning, temporal-sequencing ability (e.g. apraxia), as well as logic, grammar, and the capacity to perform calculations; depending on which hemisphere is compromised. Individuals with lesions involving the inferior-parietal-occipital border of either hemisphere may have difficulty carrying out spatial-sequential tasks
 * Ex:** drawing "a square beneath a circle and a triangle beneath a square". Often they may draw the objects in the order described (i.e. square, circle, triangle, square). That is, they have difficulty in conceptualizing how to place the objects in relation to each other.

Those with left inferior parietal lesions have trouble with more obvious sequential-grammatical relationships. Because the right brain does not understand grammatical relationships, a sentence that starts which the name "John" is interpreted by the right parietal area as all about "John". i.e. the first word of the sentence is undertood by the right brain as the "agent" regardless of semantics or grammar. In this manner, if presented with the sentence, "give me the book after you give me the pencil", the right brain would respond to the order of presentation rather than their grammatical relationship and would thus present the book then the pencil. When left parietal input is abolished, proper temporal-sequential and grammatical programming/comprehension thus suffers.
 * Ex:** may be unable to understand the question: "John is taller than Jim but shorter that Pete. Who is taller?" In part, this is not only a function of left parietal dysfunction but the right hemispheres difficulty in dealing with temporal-sequential and grammatical relations.