24 A practical guide to the Istanbul Protocol – for medical doctors tures are easily felt through the tissues. The pathophysiology of the reduced elasticity in the heel pad is thought to be tearing of the connective tissue septa, leading to deprivation of blood supply and secondary atrophy of fat cells with loss of the shock absorbing ability. Damaged footpads are not pathognomonic of falanga, but are also described in connection with other conditions unrelated to torture, e.g. lesions in long-distance runners and patients with fractures of the heel bone. It should also be stressed that normal footpads at clinical examination does not rule out exposure to falanga. Changes in the plantar fascia The plantar fascia springs from the calcaneus and proceeds to the forefoot. It supports the longitudinal arches of the foot, assisting the foot muscles during walking. Changes in the plantar fascia are present in some torture victims after falanga and are probably due to the repeated direct traumas to this superficial structure. After falanga, the fascia may appear thickened with an uneven surface at palpation, and tenderness may be found throughout the whole length of the fascia, from its spring to the insertion. Disruption of the plantar fascia has been reported, based on the finding of increased passive dorsiflexion in the toes at clinical examination (Forrest, 2002; Skylv, 1992). Closed compartment syndrome The plantar muscles of the foot are arranged in tight compartments – an anatomical arrangement which makes it possible for a closed compartment syndrome to develop. A closed compartment syndrome is defined as a painful ischaemic, circulatory disturbance in connection with an increase in pressure and volume inside a well-defined muscle compartment. In the acute form, with a rapidly increasing pressure, e.g. caused by bleeding inside the compartment, the symptoms are alarming and the consequences severe with necrosis of involved tissues if left untreated. Chronic compartment syndromes may occur as a result of an increase in the muscle bulk and/or a narrowing of the compartment. Clinically, this condition presents itself with pain that intensifies with load and which finally makes continued muscle activity impossible. The pain subsides after a short period of rest, but recurs if muscle activity is resumed – a picture not unlike that seen in impaired walking after falanga. In a MRI study comparing torture victims exposed to falanga with healthy volunteers, significant thickening of the plantar fascia was found in all victims. Apart from this, morphological changes were present in the fascia, possibly representing scar tissue formation. No signs of detachment of the plantar fascia, closed compartment syndrome or changes in the heel pads were shown in this study (Savnik et al., 2000). Neurogenic pain The skin of the soles in the normal foot is apart from the arch area, very thick and firmly tied to the underlying tissues. It is very rich in sensory nerve endings, which register touch and pressure. Peripheral nerve lesion affecting the small nerves of the soles is a very possible consequence of falanga. Neurogenic pain due to nerve lesion is therefore a possible contributing pain mechanism. Impaired walking Deviations from the normal gait pattern are very frequent after exposure to falanga. Many torture victims develop a compensa-