The answer will depend on what operation you have in mind.
It temporarily slows the operation of the brain.
simple apprehension, judgement and reasoning
Yes
To think is to analyze, examine and sort out information and form in the mind ideas or opinions, to perform any mental operation, to reason, to bring to mind or recollect, to determine, resolve and to work things out.
The act of recollecting, or recalling to the memory; the operation by which objects are recalled to the memory, or ideas revived in the mind; reminiscence; remembrance., The power of recalling ideas to the mind, or the period within which things can be recollected; remembrance; memory; as, an event within my recollection., That which is recollected; something called to mind; reminiscence., The act or practice of collecting or concentrating the mind; concentration; self-control.
Bleed system and then see if pumping clutch is necessary for proper operation. Keep in mind that there is a master cylinder and slave cylinder.
No it's not always necessary and it depends how long the operation is for. The better health (mind, body and spirit) the person is in the better chances they will have in surgery. To be honest anyone that is about to have surgery wouldn't have that calm a nights sleep unless they were in hospital and the nurse gave them a sleeping pill.
the opposite operation of an operation
This is called an inverse operation.
An inverse operation undoes the effect of another operation. For example, addition is the inverse operation of subtraction, and multiplication is the inverse operation of division. Applying an operation and its inverse leaves you with the original value.
White revolution was associated witha) Operation River b) Operation milk c) Operation Flood d) Operation Amul