Language

Language and Communication



[Similar images on p. 146, Carter] Catscan image credit, John norseen, George Washington University. Reveals differential patterns of functional brain activation. Shown are neural activation patterns associated with four different operations within the realm of verbal processing. Shown is the left hemisphere and most people are left hemisphere dominant for language processing.


Hearing words show temporal cortex activation (location of auditory cortex); seeing words shows occipital cortex activation (visual cortex); speaking words shows frontal (motor cortex); and generating words shows prefrontal cortex activation (uhhhh.... executive functions, coming up with new ideas, response flexibility, following rules).

Conceptual over view, cognitive science:

LOCALIZATION of Function: specific regions (locations) of the brain have specific functions. Damage to that region leads to impairment or loss of specific functions. In the absence of damage, individuals with varying degrees of efficiency and/or interconnnectivity in that region may show varying degrees of proficiency in it's specific function. Taken to an extreme, this concept suggests MODULARITY wherein independent modules of the mind-brain perform specific and unique processing on particular forms of information.

DISTRIBUTION of Function: any function or process of the mind-brain will involve multiple regions (either nuclei or pathways) distributed throughout the nervous system. Therefore, the location is not as important as the overall mass action of the brain. Taken a bit to an extreme suggests the concept of EQUIPOTENTIALITY wherein any brain region can be organized or re-organized to perform any task. Recovery of Function is also possible to an extent we once did not realize.

Tha Main areas: BROCA'S AREA, frontal, and WERNICKE'S AREA, temporal.

Varieties of APHASIA (language disorder; Carter, p. 147):
1. Broca's aphasia - motor, nonfluent, expressive
2. Wernicke's aphasia - sensory, receptive
3. Conduction aphasia - central
4. Anomic aphasia - anomia, naming items
5. Transcortical motor aphasia
6. Transcortical sensory aphasia

Review of the "A"s so far:

Amnesia, Agnosia, Aphasia, Anomia, Ataxia (motor), Apraxia (motor-conceptual)