**Figure 6.**

*ERD/ERS percentage change of Power Spectral Densities (PSDs)of Theta frequency wave form when compared among male and females in all the three conditions where significant difference could be appreciated at F3 in Retention condition; at FP1,F8 in Semantic manipulation condition and at AFz in Backward manipulation condition and results could reflect same as Alpha frequency wave form that females outperformed in the visuospatial DMTS task compared to males using T-test at 5% confidence level. The contextual inference from the present study in relation to the above stochastic phase-space trajectory of Off-Centre α ERS (Central)-On-Surround α ERD-On Surround θ ERS document a significantly enhanced PSD values of said trajectorial path in females as compared to that observed in males, endowing the female gender with neurophysiologically efficient neural dynamics of working memory.*

• The Alpha frequency waveform ERD with Lateral Asymmetry Index spreading through parietal region during retention and semantic forward information processing conditionis suggestive of *laterality restricted looping of ERS-ERD console within the left hemisphere*.

The precept of *Hemispheric Encoding/Retrieval Asymmetry (HERA)* so documented had been first hypothesised by Tulving et al. [53] supported by Nyberg et al. [54] as well that advocates the premise of **preferential and skewed involvement of left hemisphere in semantic (algorithmic non-linear neural information flow) retrieval and encoding** whereas **right hemisphere seems to be more involved with the episodic retrieval.**

The visual sensory inputs/information so perceived in the form of varied protocols of *Delayed Matched to Sample Task (DMTS)* is essentially relayed to primary visual cortex underlying EEG occipital region electrode pairs where information is processed. Primary visual cortex (V17) [55] subserves the qualia of perception and visual association areas (V18, 19) [56]. Lisman and Jensen [57] concluded **the process of recognition through** *patterned-matching of the gamma-burst, alpha-theta waveforms looping or the bootstrapping (piggy-back riding) of gamma burst onto alpha-theta combine waveforms***.** The visual inputs as a part of visuo-spatial *DMTS* are perceived by occipital region and it has been modelled [58] that such visual impulses are then translated and transmogrified into auditory impulses in the differently-abled angular gyrus (anterolateral region of parietal lobe, near the superior edge of temporal lobe and immediately posterior to the supramarginal gyrus), a feature that could be observed as *increase in the amplitude (ERS) of Theta Frequency wave-form in EEG*. The visual–auditory interface impulse is then transferred onto Wernicke's area/auditory neural codes (Brodmann area 22, superior temporal gyrus) in order to appreciate and decode the semantics of visuo-auditory interface impulse perceived as symbols, letters, words and matching sounds accordingly [59].

*ERS of Theta Waveform so evolved by interacting stimulus-locked dedicated neuronal pools with ERD of Alpha waveform functionally and neurophysiologically representing the dedicated reverberating mirror neuronal pool system seems to be representing the working model of Human Memory-Language.* It seems that the generation of language shapes into the virtual stochastic phase-space of human mind through the help of **reverberating Lateral Asymmetry of** *Alpha wave-form ERD, representative of Mirror Neurone System (MNS)*. Previous studies have reported that *Alpha ERD during motor response in a WM task has been interpreted as the preparation of a movement-specific motor task* but does not reflect processing for the specific task itself [43, 60]. The alpha ERD in the sensorimotor system may buttress the concept of **a preparatory role of alpha ERD**. Alpha ERD had been also posited even during anticipation of an event [61], again emphasising the role of preparation for a motor response. In this background, the *role of alpha ERD* could be perceived as developing a preparatory *schema intricately interwoven with the Mirror Neurone System (MNS) creating and evolving an image (an alter-image in the stochastic phase-space of Human Mind)* during the ensuing encoding interval.

The findings of *ERS in theta wave-form with a significant change in PSD along select EEG electrode pairs a recent study from our laboratory* have also been reported by [62, 63], though Burke et al. [21] and [46, 47] could not observe such a patterned and locked differential EEG theta wave-form PSD during the manoeuvres of retention, semantic and backward manipulation and hypothesised a possibility of contextual overlapping between encoding and retrieval tasks.

*Language as the Working Model of Human Mind DOI: http://dx.doi.org/10.5772/intechopen.98536*

The above documentation of *ERS Theta Frequency waveform bootstrapping with concomitant ERD of Alpha Frequency waveform seem to evolve an envelope of Working Memory that translates into a comprehensible means of communication, Language.* The interplay between these frequency wave-form forms the ground of working memory which is thought to be an important constituent component instrumental in language acquisition, comprehension and manipulation. The amount of information/memory inputs restricted by day-to-day working memory might be useful and can be considered as the focus for processing and acquisition of language e.g., semantics of letters and words (positioning and placement), syntactics of words (reproducible neurodynamically grammatically cogent disposition/sequence), word frequency, plausibility, discourse context, intonational information, etc.

The processing of letters or words in the form of memory inputs give an insight into the underlying neuro-physiological processing and neural dynamics responsible for the evolution and progression of the evolved phenomena of written and spoken language that make use of semantic and episodic memory. The *EEG Power Spectral Densities (PSDs) of alpha frequency band during semantic memory and information processing* and *the PSDs of theta frequency band during episodic memory and information processing* that follow separate paths in their nativity could be responsible for holding relevant information across coordinates of space and time (freezing the flow of space and time in the process) providing a gateway for synthesis of a structured and evolved system of communication, known as *language*.

The above observations create the platform for an integrating function and role of principles of *Working Memory in generation and evolution of a synthesised and coordinated communication system as outlined by the structured Language of Human Mind.*
