The approach you are taking and the comparative you are using maybe are complicating unnecessarily your understanding of the model.
The right approach is psychology. The model was created from as a psychological tool for understanding personality.
Model A works with the Ego, Super Ego and Id, which are the three parts of Physic apparatus, in the structural model proposed by Freud. It is about The Mental Life of the individuals, where the personality relies.
We can say its a psychological theory of personality. Forgetting that Personality Theory is part of psychology limits the understanding and correct use of the theory.
And, what is personality?
Personality is defined as the set of habitual behaviors, cognitions and emotional patterns that evolve from biological and environmental factors...Trait-based personality theories, define personality as the traits that predict a person's behavior.
-Source Wiki.
Comparing personality with used muscles is an odd approach imo. Personality is behaviors, cognition and emotional patterns…psyche is intangible but its results are observable. Socionics does not includes in the theory development of IEs, its just a program in which each personality works.
In that sense, then,
ID is the
primal instinctual part,
Super ego is the
critical and
moralizing role,
Ego is the organized, realistic part that
mediates between the desires of the id and the super ego.
Ego Block--CONSCIOUS SELF, THE "I" 1-3 yo
1.Leading Function 4D
2.Creative Function 3D
Super-Ego Block--CONSCIENCE 5-6 yo
3.Role Function 2D
4.Vulnerable Function 1D
Super-Id Block--SUBCONSCIOUS, INNER CHILD, EGO IDEAL* 5-6yo
5.Suggestive Function 1D
6.Mobilizing Function 2D
Id Block--INSTINCTS- Primary Process Thinking 0-1 yo
7.Ignoring Function 3D
8.Demonstrative Function 4D
Why the first two and last two functions are the strongest? Is it contradictory?
No.
Because
Instincts and
Ego are the Strongest parts of human
Psyche. And they are the first stages of development of the psyche of the individual and its personality. Psyche is an apparatus, a machine who works or plays with certain program.
The
ID block is used and well known for the individual, but its brushed away systematically by the
EGO (the part which mediates between instincts-id- and the conscience -super EGO-) normal daily basis. However, the Id could manifest without mediation when the rest of the parts of the apparatus are compromised or
threatened. In other words, are the basic instincts of the personality or the shadow functions that portrays the exact opposite of the mediator (each side of the same coin) f.e.:
Si= peaceful Se=aggression
Each personality have two IEs as
Primary process thinking (instincts):
LII: Ni Te
ILE: Te Ni
ESE: Se Fi
SEI: Fi Se
LSI: Si Te
SLE: Te Si
EIE: Ne Fi
IEI: Fi Ne
ESI: Si Fe
SEE: Fe Si
LIE: Ne Ti
ILI: Ti Ne
EII: Ni Fe
IEE: Fe Ni
LSE: Se Ti
SLI: Ti Se
How does it manifests?
The Oldham description could portray how the Id or instincts looks in each type (with each respective disorder).
The 7th Function Its called ignoring (as the names says, because we IGNORE voluntarily this function. How each type experiments 8th function is different and it depends on the characteristics of the IE. If its Intuition, Sensoring, Thinking or Feeling. Whatever the case, the type is well versed in the use and understanding of such function, but its often considered UNIMPORTANT and too limiting compared with the preferred (refined version) 3rd function. These both work in instinctive way, are used in these terms: vital (life/death pulsations), 7th , pushing to fulfill needs (producing 8th).
EXAMPLES:
Situation A: Extreme situation (F.e. life or death), Ego and Super Ego shocked. Used IE: Vital, 7th.
IEE, ILE: Ni. F.e. Focusing in the worst outcome, anxiety for the future, deep concerns, worried about the specific threatening situation.
SLI, SEI: Se. F.e. Fight, forcefully impose. Aggression.
EII, ESI: Fe. F.e. Showing up emotions. Scream, yell, calling attention, drama.
LSE, LIE: Ti. F.e. Become quiet and retreat to think introvertedly. Consider particularities of the threatening situation. Using subjective logic to think in the logical details and particularities of the life death situation. Spot inconsistency and contradictions. Look for reestructure.
ILI, IEI: Ne. F.e. Consider new possibilities. Different outcomes of particular threatening situation. Being positive.
SEE, SLE: Si. F.e. Act chill. Calm down. Seek for own comfort or relief.
EIE, ESE: Fi. F.e. Consider its own particular feelings and morals. Think of their loved ones.
LII, LSI: Te. F.e. Using practical logic. Thinking how to solve the problem practically (hands on, setting steps).
* Super Ego (morals) is divided in two parts, Conscience and Ego Ideal. The Ego Ideal would turn lately in the seeking or suggestive. What we look for in others. In need of psychological sources of term Super ID, however.