Thinking and Calorie Consumption

MENTAL FATIGUE 5

ThinkingandCalorie Consumption

Qn.1

FerrisJabr seeksto usedocumented resultsto explainthemainreasonpeoplefeeldrained andmentallytiredwhentheyperforma temporarymentalprocess.Theauthor’smainpointis thatpopularnotionthatcomplexthoughtsandintenseintellectualexertioncan drainthebrainis a one-dimensionalapproachto an otherwisemultifaceted problem.Ferris suggestthatthehumanbrainisenergysufficient,anditneedsonly12 watts of energyto functionefficiently. The12 watt representone-fifthof thetotalenergyrequiredto power a 60 wattlightbulb(Jabr,2012).Therefore, the main point made by the author is that it is not theduration of mental activity or exertion that causes mental fatiguebut a person’s mental attitude

Q.4

Ferrisindicatesthatbecauseof thefactthehumanbraincontinuously slurps highquantitiesof energyforan organof its size,irrespective of whetheran individualis performingstrenuousactivitiesornot, itis wrongto pointthatthinking(hard)consumesmorecalorie (Jabr,2012).Buttheauthoris quickto suggestthat firingneurons requiresmoreenergy,butanylocalenergyneedis tinybecausethebrainsbaseline energyintakeis substantiallyhigh.In thisvein,theauthorsuggeststhat,even though, shortdurationsof additionalmentalactivitiesmay requirea littlemorebrainpower thatnormal,thechangeis insignificant.Ferris suggestthatthere is nolaboratoryexperimentconductedthatconclusively indicatethatthe humanbrainexpendtoomuchenergyduring challenging mentalactivitiessuchthatthere is a feelingof fatigueafterthat.

Extrapolatingthescientificfindingsthattheneuron firing activityconsumessubstantiallyhighamountof energy,particularlyin circumstancewhenperforminga challenging mentalassignments,theauthorfindverylittlesubstancethat can supportthispremise,becauseeatingfoodstuff richwhenperformingsuchmentaltasksdoesnot improveperformance(Jabr,2012).Theauthorpointis thatthere is contradictoryandscantevidencefrom experimentandlaboratoryglucose studiesthatglucose consumptionin thehumanbrainis not a merematterof greatermentaleffortsappingmoreof theavailablequantitiesof energy.

Thegistof theauthors’pieceof workis thatheisnot persuadedthatanysolitarymentaltaskcan noticeably alterenergylevels in thehumanbrainorblood.Nonetheless,theauthoragreesthata morechallenging mentaltaskneedsmoreglucose becausethere is moreneural actionsbutindicatesthatwhenindividualsperformsuchtasksthere will be onlyan insignificantchangein energyconsumptionin relationto thetotalbrainenergyrequirement.Theauthorsupportshis propositionby indicatingthatthebaselevel of brainis substantiallyhigh,evenin conditionswhenthere is verydiminutivementalactivity.Mostof theorgansin thehumanbodydonot needtoomuchenergyforbasicactivities(Jabr,2012).Theauthormainpointis thatinthescenarioof a SATthere is something outside thementaleffortthat leadsto feelingof braindrainorpost-exam stupor.Ferris contentionis thatstressorthementaldispositionof a personwhenperforminga taskthat resultto mentalandphysicalexhaustion.In thiscase,hesuggeststhatuncertaintyabout thefuturesendsstresshormones swimmingin thebloodstream,andthisis whatsparks bodilyreactionsthat causeexhaustion(Jabr,2012).Qn.2

Fromthestatementgiven aboveitis apparentthatitthementaldispositionof an individualthat resultinfeelingof braindrainandexhaustionwhenperforminga mentalandphysicaltasks.In thisvein,itis importantforworkersin companiesandotherorganizationsto remaincalmandcomposedwhenpreparingandperforminga challenging mentalactivitysoas to preventstresshormones from wreckinghavocto thebodysystems(Goewey,2012).Thisis becauseitis thebelievethatwehavedrainedour brainthat causesfeelingof exhaustion.Itis imperativeforworkersto recognizethatitis theirmentalattitudethat causesmentalfatigue.Ifan individualbelievesthata givenassignmentis difficult,itwill be as such.Ifa person anticipatesaparticulartaskshall draintheir energy,itwill. Andifa person thinksa giventaskis stressful, itwill stimulatethestressresponsesystem.Whenthesestresshormones pourinto thehumanbloodstream,theyshall drainyour energyby stirringbloodpressureandeventhebreathing andheartrate

Ithinkthattheauthorprovidesenoughsupportto showthatthere is ‘’mentalworkoutsprobablydonot demandsignificantly moreenergythan usual’’butitis of utmostimportanceto conductmorestudyto establishwhetherthere is a linkbetween mentalactivitiesandbrainenergyconsumption.Theauthorcitesa bundleof contradictoryevidencemeaningthatthisis an areathat requiresfurtherresearchto arriveat a convincingproposition.Qn.4

Ifounditratherdifficultto subsume all theevidenceprovidedby theauthorfrom researchstudiesto arriveat a conclusion.Forexampletheauthorstatesthat‘’evenmildlystressful intellectualchallengeschangeour emotionalstatesandbehaviors’’butprovidesnoinformationon howthismight affectbrainenergyconsumption(Jabr,2012).In additionaltheauthorjumpsfrom one evidenceto anotherto supporthis propositionbutmostof thestudiesprovideconflictingresults.Itishard to digesttheresearchevidenceusedby the authorto informhis judgment.It is difficult to fully understand the mathematics of converting thebasal metabolic rate to a measure of power.

References

Goewey,J. (2012, August 17). TheCure to Mental Fatigue.Retrieved February 20, 2015, from Donjosephgoewey.com:http://donjosephgoewey.com/the-cure-to-mental-fatigue/

Jabr,F. (2012, July 18). DoesThinking Really Hard Burn More Calories?Retrieved February 19, 2015, from Scientific American:http://www.scientificamerican.com/article/thinking-hard-calories

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