The story of Phineas Gage, described above, is currently a milestone in neurology, as it demonstrated for the first time, and unequivocally, that moral judgment requires the integrity of specific cerebral systems. Thanks to recently developed techniques, it was possible to better explore the cerebral areas mainly involved in the Gage's case, in particular the VMPFC [
11]. Nowadays the contributions coming from studies on patients whose clinical conditions are similar to those of Gage showed that deficit involving VMPFC and the nearby OFC/VL [
98,
118] may modify the moral sense. Furthermore, some evidence indicates that alterations of the right frontal lobe can be associated with some abnormal social behaviours, while those of left frontal lobe can be linked to outbursts of anger and violence [
119,
120]. Focal lesions of the VMPFC and of the OFC/VL interfere with the normal development of moral sense and judgment and, moreover, if they occur before 16 years of age, they can lead to severe antisocial behaviour, insensitivity to the future consequences of decisions, and to the repeated failure of attempts to correct aberrant behaviours [
121,
122]. Patients with focal lesions of the VMPFC, especially of the right one, show indifference in front of violations of socio-moral rules, and little empathy towards the victims [
45,
73,
109,
123‐
130]. Lesions of the VMPFC may impair feelings of pity, shame, guilt, envy, unjustified pride, and malice, all involved in one’s own “point of view” and that of others [
121,
131,
132]. Although the concept of the theory of mind remains intact, such individuals cannot understand the others' feelings and emotions (theory of the affective mind), as it emerges from tests regarding the sense of irony and the gaffes [
126,
133]. Patients with lesions of the VMPFC show low or no autonomic responses (such as heart rate, skin conductance, pupillary reactivity, piloerection, sweating, etc.), especially to social stimuli [
129,
134]. In addition, they appear to be fake, manipulative, and aggressive. Finally, lesions of the OFC/VL alter both the use of immediate feedback coming from social signals and emotions, and the control of emotional and impulsive responses [
47,
68,
126,
128,
132,
135‐
138]. Subsequently, more specific tests designed to explore the formulation of moral judgments in subjects with lesions in the VMPFC were utilized. A comparison of seven patients with 12 control subjects regarding personal, impersonal, and non-moral dilemmas demonstrated that the former had a greater propensity to judge violations of personal morals as acceptable behaviour, and they did so with extreme rapidity and certainty [
124]. In a similar study, six patients with bilateral focal damage of the VMPFC were examined [
126]: they presented a low level of autonomic activation in response to emotionally-charged images, and displayed limited empathy, sense of embarrassment and sense of guilt. In both these studies, the subjects tended to make utilitarian choices when facing with moral dilemmas. These results were recently confirmed in patients with lesions of the VMPFC, whose variations in skin conductance were also evaluated as indicators of the emotional state. These patients, in contrast to the control subjects, chose solutions with a personal advantage and detriment of others, with no variation of skin conductance during the formulation of their moral judgment. It was, thus, hypothesized that the VMPFC is widely involved in the modulation of moral judgment and in anticipating the emotional consequences of the rule violation [
124,
126]. It was further reported that these patients continue to refuse unfair offers during the “Ultimatum Game” test [
139]. This suggests that when the OFC/VL region is integral, it may be at the basis of feelings of social aversion, and can continue to apply altruistic punishment in situations in which fairness and intentionality are clear or predefined. Although recent lesions at the level of the VMPFC can alter the acquisition of a moral sense [
129,
130], subsequently the patients maintain an intact moral reasoning, and conserve their awareness of rules and moral conventions [
139‐
142]. These individuals show a deficit of pro-social feelings, and cannot use their ability moral reasoning to anticipate the consequences and feelings associated with their actions [
123,
143‐
147]. It is noteworthy to mention that split-brain patients judge moral violations on the basis of the outcome. This is generally explained by the possibility that the left hemisphere, that responds verbally to the dilemmas, does not receive inputs from the right temporoparietal junction, possibly implicated in belief attribution [
58].