Type and EEG

The relationship between neurology and type is in an early stage of exploration, but significant correlations have already begun to emerged – most notably between introverted and extroverted types. The preliminary work of Dr.Dario Nardi has provided a rough template that further studies can use as a guidepost. The following grid uses data by Nardi from his book Neuroscience of Personality (2011). It displays the sixteen types and their average use of each brain region.

NeFi

NeTi

SeFi

SeTi

FiNe

TiNe

FiSe

TiSe

TeSi

FeSi

TeNi

FeNi

SiTe

SiFe

NiTe

NiFe


But type cannot be represented entirely by a static presence of activity per brain region. It would appear instead that different types utilize different circuits of activity. This activity is better portrayed via animated images:

Four-Point Circuit This circuit pattern was observed in TeNi and FeNi types. It begins at T3 which is the “Precision Speaker” process, which specializes in the composing of complex sentences and attends to grammar. It then follows to the P3 region which is the “Tactical Navigator” which identifies tangible objects and attends to where oneself ends and where the world begins. Then it proceeds to F8 which is the “Ground Believer” which evaluates people’s activities in terms of likes/dislikes, then ends at Fp1 which is the “Chief Judge” which focuses on explaining and making decisions. The pattern is described as efficient and systemic: data enters, goes through this process quickly, and results in an output.
Tennis-Hop Pattern: This pattern was seen in Se users, and is a state brought upon when a person is alert but bored, or are waiting to respond to an unknown outcome. It is a state of tentative alertness, like that of a tennis player on his toes. All sections light up with a low amplitude and toggle similar to the christmas tree pattern.
Christmas Tree Pattern: This pattern was seen almost as a default in Ne-leads, but prevalent in all types with Ne. All sections light up with varying amplitudes, toggling out of synch with one another as a response when engaged in cross-contextual thinking.
Zen State of Connectivity: Blue indicates low amplitude. This pattern of “relaxed yet alert” was often seen in Ni types. It is a state where each region is in synch with every other region. All types showed this pattern at some point or another, when doing a task they have expertise in, however Ni types demonstrate this pattern when they’re tasked with the opposite: tacking unfamiliar, novel problems. Additionally, Se-lead types showed this state when “in the zone” and engaged in a crisis situation.
Extroversion At Rest: This image cycles between two images. The first is mostly black and shows the state of the brain of Extroverted types at rest. The second image shows an Extrovert’s brain activity when provided stimulation. Compared to the Introverted types, Extroverted types have less brain activity when not provided stimuli.
Introversion At Rest: This image cycles between two images. The first is partly black and shows the state of the brain of Introverted types at rest. As you can see at rest, the Introverted brain has plenty of activity occurring without the need for outer stimuli. The second image shows an Introvert’s brain activity when provided stimulation, which amplifies it to a state of complete activation or overwhelm.

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