"Dario Nardi recently published a book called Neuroscience of Personality. It contains his insights based on put a 20 sensor EEG on 60 college students of various types, and then having them perform various activities.
Since it includes both qualitative and quantitive research results, it's probably not definitive proof of type or type dynamics. Still, I think his approach is interesting and his book helps shed light on how type relates to activity in the neocortex."
Extraverted Sensing (Se)
Show a "tennis hop" brain pattern.
Easily go "in the zone" in a crisis situation.
Quickly integrate body and sensory information.
Easily bored and need external stimulation.
Focus on literal or common interpretations.
Favor details that are dramatic or in motion.
The "tennis hop" brain pattern is one in which all regions of neocortex out low amplitude and out of sync. This is an effective state that requires little energy while the shifting frequencies allow the brain to quickly direct whichever regions are needed for a surprise, incoming task.
Introverted Sensing (Si)
Brain activity reflects their background, training, and job expertise.
Get "in the zone" when reviewing past events.
Tend towards rote memorization, repetition, and in-depth reviews of daily events—all habits that help them burn new neural pathways.
Good at recalling information without a context and recalling kinship data.
Favor T5, which processes social feedback and T6, that helps us consider the future.
So Si seems to lead to reinforcement and specialization over time. ISTJs and ISFJs are both visual (favor O1 and/or O2). ISxJs favor Fp2 over Fp1, while ESxJs do the opposite.
Extraverted Intuiting (Ne)
Often show a "Christmas Tree" pattern.
Often experience creative highs.
Provide fast, creative responses (sometimes too creative)
Find it difficult to get "in the zone," and can do so only after practicing and internalizing an activity over weeks, months, or years.
Use regions that support imagination.
A "Christmas Tree" pattern is one in which the neocortex is active all over, each region is of high amplitude and out-of-sync with others. This pattern indicates cross-contextual thinking. This pattern is also very energy intensive, and may produce distractions and contradictions.
Introverted Intuiting (Ni)
Show a whole brain, zen-like pattern
Show this pattern when they attack an unfamiliar, novel pattern.
Their zen state works best when focusing on a single question, without distraction.
Enter the zen state when ask to envision the future.
Usually benefit from a sensory focus
Their whole-brain, zen-like pattern occurs when all regions of the neocortex are in sync and dominated by brain waves that are medium-low frequency and very high-amplitude. Other types only show this pattern when they engage in their specific area of expertise, unlike Ni-ers, who also show it when tackling a new problem.
ENxJs usually benefit from a physical or sensory focus. NJs tend to be generalists compared to their SJs cousins.
Extraverted Thinking (Te)
Show most efficient use of mental energy as they rely on evidence-based decision-making.
Rely on T3, O1, C3 and Fp1. Tend to use other areas very little, even on tasks that would normally invoke them.
Rely on measurably sensory information
Focus on goals and stimulated by task completion and error correction.
Tend to move to action before accurate or what-if processing, so quick efficiency can become a pitfall.
Show high activity in F8, which handles deeply felt personal values, often expressed negatively.
Female Te types show more diverse brain activity and are more responsive to social feedback.
IXTJs are more visual, attentive to tone of voice, and focus on implementation detail over quick decision-making. ESTJS attend more to details, are more open to brainstorming, and listen intently to authority figures. ENTJs can enter a creative mode similar to INTJs.
Introverted Thinking (Ti)
Show high use of four regions that afford complex logical reasoning: F3, F4, P3, P4
Use F3 to linearly derive solutions. (highest for ESTPs followed by INTPs)
Use F4 to categorize and define concepts. (highest for INTPs, followed by ESTPs)
Use P3 to integrate visual-kinesthetic data. (highest for ISTPs then ENTPs)
Use P4 to holistically weigh numerous pros and cons of many uncertain or risky factors. (highest for ENTPs followed by ISTPs)
Above regions are located away from direct sensory contact, so have a "deep" or "detached" quality.
Tend to enter a dissociated state when arguing or meeting someone new. In this state, their neocortex shuts out raw emotions in order to enjoy objectivity.
Least interested in listening.
Engage the above regions + Fp1 and Fp2 when examining a topic from multiple angles and integrating the angles into a coherent way.
INTPs are likely to quickly stop listening as they assess the relevance of what others are saying.
Extraverted Feeling (Fe)
Focus on social responsibility.
Stimulated by communicating their explanations and decisions.
Use Fp1 to suppress emotional impulses from deep in the brain in favor of sophisticated cognitive responses.
Use Fp2 less, so may sometimes suddenly switch from highly composed to very angry.
Use F5 a lot, which helps them adjust to social feedback.
ExFJs show high activity in T3, but least activity in visual regions O1 and O2. ESFJs are more left-brained, high in C3 and F7. ENFJs are might right-brained, showing high activity in F4 and T4.
Are consummate listeners who listen in a holistic way.
INFPs can deeply listen for up to 10 minutes at a time, ISFPs listen briefly and then move to action.
Show high activity in T3 and T4, which handle language.
Carefully compose their own speech, attending to both content and delivery.
Show high activity in F8, and are stimulated by rankings of importance.
Show the least activity in interior regions that aid logic.
Rely on left-brained (Fp1) decision making.
INFPs may get to the core of a person's psychology by listening for so long. INFPs are less likely to defend their own views or take action, though when they stop listening, region Fp1 becomes very active as they make a strong (and perhaps final) decision.
ISFPs are attentive when others withhold information (like social feedback).
I actually found this thread on another site and wanted to see what other people thought