Neural basis of naming
DOI link for Neural basis of naming
Neural basis of naming book
What brain structures are critical for word production? The classical Wernicke-Lichtheim model (see Figure 1.1) gives a rather straightforward account. In any word production task, the auditory image of a word is retrieved at Wernicke's area in the left superior-posterior temporal lobe and fed to Broca's area (the posterior part of the third frontal gyrus) via a cortico-cortical pathway called the arcuate fasciculus. At Broca's area, the motor image for that word is evoked and used for guiding articulatory movements. If the word production task employed requires intentional/ conceptually driven communication (e.g., carrying a conversation or listing names of various animals on request of an examiner) rather than more automatic activity like repeating a heard word, a "concept centre" suggested by Lichtheim would take part in the process. This "center" was not localised in any specific area but was thought to be subserved by the regions outside the classical language zone. However, some early authors actually attempted to localise the "naming centre" in the posterior inferior regions of the (left) temporal lobe, following the assumption that it would serve as a convergence point for all incoming sensory information (Mills & McConnell, 1895).