The [[ventral stratium|Ventral Stratium]] is positivly corrlated with effort, and thus it is sought to be involved in [[motivation]]<ref>[http://www.plosbiology.org/article/info%3Adoi%2F10.1371%2Fjournal.pbio.1001266 Mechanisms Underlying Motivation of Mental Versus Physical Effort. PLoS Biology, 2012; 10 (2): e1001266 DOI: 10.1371/journal.pbio.1001266.]</ref>. It is involved in reward system<ref>Gregorios-Pippas L, Tobler PN, Schultz W (March 2009). "[http://jn.physiology.org/content/101/3/1507.long Short-term temporal discounting of reward value in human ventral striatum"]. J. Neurophysiol. 101 (3): 1507–23. doi:10.1152/jn.90730.2008. PMC 2666398. PMID 19164109.</ref>. release of [[dopamine]] in the ventral stratium cause good feeling. [[dopamine|Dopamine]] depletion in ventral striatum reduces propensity for physical effort <ref>Salamone JD, Correa M, Farrar A, Mingote SM. Effort-related functions of nucleus accumbens dopamine and associated forebrain circuits. Psychopharmacology. 2007;191: 461– 482.</ref>