Glossary - C
Calx - the hindmost part of the foot; the heel.
Carpopedal - affecting the wrist and foot.
Causalgia - a burning pain often associated with trophic skin changes in the hand or foot, caused by peripheral nerve injury. The syndrome may be aggravated by the slightest stimuli or it may be intensified by the emotions. Causalgia usually begins several weeks after the initial injury and the pain is described as intense, with patients sometimes taking elaborate precautions to avoid any stimulus they know to be capable of causing a flare-up of symptoms. They often will go to great extremes to protect the affected limb and become preoccupied with such protection. Any one of a variety of injuries to the hand, foot, arm, or leg can lead to causalgia, but in most cases there has been some injury to the median or the sciatic nerve. Injections of a local anesthetic at the painful site may bring relief. Sympathectomy may be necessary to eliminate the severe pain, and in the majority of cases it is quite successful. Psychotherapy may be necessary when emotional instability is suspected. Emotional problems may have been present before the initial injury, or they may result from the intense suffering characteristic of severe causalgia.
Charcot neuropathy - is a progressive deterioration of weight-bearing joints, usually in the foot or ankle.
Chopart's amputation - amputation of the foot, with the calcaneus, talus, and other parts of the tarsus being retained.
Clawfoot - a high-arched foot with the toes hyperextended at the metatarsophalangeal joint and flexed at the distal joints.
Clubfoot - deformity in which the foot is twisted out of normal position; called also talipes. The foot may have an abnormally high longitudinal arch (talipes cavus) or it may be in dorsiflexion (talipes calcaneus) or plantar flexion (talipes equinus), abducted, everted (talipes valgus), adducted, inverted (talipes varus), or various combinations of these (talipes calcaneovalgus, talipes calcaneovarus, talipes equinovalgus, or talipes equinovarus). There are several theories as to the cause of clubfoot. A familial tendency or arrested growth during fetal life may contribute to its development, or it may be caused by a defect in the ovum. It sometimes accompanies meningomyelocele as a result of paralysis. In mild clubfoot there are slight changes in the structure of the foot; more severe cases involve orthopedic deformities of both the foot and leg. Although clubfoot is usually congenital, an occasional case in an older child may be caused by injury or poliomyelitis.
Cristae cutis - ridges of the skin produced by the projecting papillae of the corium on the palm of the hand and sole of the foot, producing a fingerprint and footprint characteristic of the individual; called also dermal ridges.
Cryptopodia - swelling of the lower leg and foot, covering all but the sole of the foot.
Cuneiform - wedge-shaped bone; applied particularly to three of the bones in the tarsus of the foot.