65 authorities must bear this in mind when applying or assessing the sanctions they establish. 102. According to Article 5 of the Convention, all persons deprived of their liberty shall be treated with regard for the inherent dignity of the human person.217 On other occasions, the Court has indicated that detention in conditions of overcrowding, isolation in a small cell, with lack of ventilation and natural light, without a bed for rest, or adequate sanitary conditions, incommunicado or undue restrictions in the visiting regime, constitute a violation of the right to humane treatment.218 Since the State is responsible for prison establishments, it must guarantee prisoners the existence of conditions that respect their fundamental rights and a decent life.219 103. The Court has also established that “prolonged isolation and compulsory incommunicado are, in themselves, cruel and inhuman treatment, which harm the physical and moral integrity of the individual and the right to respect for the inherent dignity of the human person.”220 104. Incommunicado may only be used exceptionally, taking into account its severe effects, because “isolation from the exterior world produces moral suffering and mental stress on any individual, which place him in an exacerbated situation of vulnerability, creating a real risk of aggression and abuse of authority in prisons.”221 105. On January 11, 1996, the military court delivered a first-instance judgment against Lori Berenson, sentencing her to life imprisonment for the crime of treason (supra para. 88(30)). This judgment was confirmed in the final instance on March 12, 1996 (supra para. 88(37)). The first-instance judgment established that she “would serve [her sentence] in the Yanamayo Prison,” where she remained from January 17, 1996, to October 7, 1998 (supra para. 88(73)). 106. In relation to the imprisonment conditions in the Yanamayo Prison, located at 3,800 meters above sea level (supra para. 88(73)), it has been proved that Lori Berenson was kept in a regime of continuous solitary confinement for one year, in a small cell, without ventilation, natural light or heating, with inadequate food and deficient sanitary facilities (supra paras. 88(74)(i), (ii), (iii) and (iv)).222 During the first year of detention, her right to receive visitors was severely restricted (supra 217 Cf. Case of Tibi, supra note 3, para. 150; Case of the “Juvenile Reeducation Institute”, supra note 3, para. 151; and Case of Bulacio. Judgment of September 18, 2003. Series C No. 100, para. 126. 218 Cf. Case of Tibi, supra note 3, para. 150; Case of the “Juvenile Reeducation Institute”, supra note 3, para. 152; and Case of Cantoral Benavides, supra note 25, para. 89. Similarly, Cf. UN. Standard minimum rules for the treatment of prisoners, adopted by the First United Nations Congress on the Prevention of Crime and Treatment of Offenders, held in Geneva in 1955, and adopted by the Economic and Social Council in its resolutions 663C (XXIV) of July 31, 1957 and 2076 (LXII) of May 13, 1977, Rules 10 and 11. 219 Cf. Case of Tibi, supra note 3, para. 150; Case of the “Juvenile Reeducation Institute”, supra note 3, para. 152; and Case of Bulacio, supra note 217, para. 126. 220 Cf. Case of Maritza Urrutia, supra note 4, para. 87; Case of Bámaca Velásquez, supra note 210, para. 150; and Case of Cantoral Benavides, supra note 25, para. 83. 221 Cf. Case of Maritza Urrutia, supra note 4, para. 87; Case of Bámaca Velásquez, supra note 210, para. 150; and Case of Cantoral Benavides, supra note 25, para. 84. 222 Cf. UN Investigation in relation to Article 20: Peru. 16/05/2001. A/56/44, paras. 144-193. (Inquiry under Article 20), paras. 183 and 184.