What are the psychological responses to extreme physical exhaustion?

Answer 1

Intolerance, distraction, semiconscious awareness of vulnerability both physical and psychological, extreme irritability, outbursts of uncontrolled emotion due to the physical strain brought on by the body feeling completely flattened causing incapability when dealing with the rational and emotive spheres.

In severe cases, unusual reactivity to climate, such as cold and heat, as the body would have difficulty regulating temperature (most likely keeping warm), as well as slowed reflexes causing both physical and mental "clumsiness". Loud sounds aggravate and are found very disturbing(annoying)and a general feeling of sluggishness as well as difficulty performing complex logic problems is to be expected-

at the same time, a state of utter exhaustion in individuals has shown that due to the low threshold toward tolerating consequences easily perceived as stressful, focusing on one given task could bring about more productive results than if the person was in form and could deal with any kind of consequence (the need to problem-solve later, or accept negative feedback for example).

Ex: A student who regularly practices the piano could become fully absorbed in the task not having the psychological strength to focus on more than one thought simultaneously, and suddenly shock the teacher with a fantastic performance even though he can't keep his eyelids open and did not practice at all since his last lesson. T

he reason for this would also be simple: due to the emotional instability and zero tolerance for basically everything, consciously OR not- depending on the person, the student would need to get the performance perfect on the first try or the teacher would make him repeat it several times, pointing out defects and instructing him on how to improve, something the student would not want to listen to or have the clarity of mind to care about in his present state of tiredness.

Hope that helped a bit.