A treatise on orthopedic surgery . e of the foot. 4. Talipes Valgus, the everted foot. This deformity is thereverse of varus. The foot is abducted and the sole is everted,so that in use the weight falls on the inner border. In these forms of lateral deformity the centres of motion areat the mediotarsal and subastragaloid joints. Compound Deformities.—Simple deformities, in which thefoot is persistently extended or flexed, or turned in or out, arecomparatively uncommon. More often they are combined invarying degree; thus the overextended or the overflexed foot is DEFORMITIES OF TEE FOOT. 787 us
A treatise on orthopedic surgery . e of the foot. 4. Talipes Valgus, the everted foot. This deformity is thereverse of varus. The foot is abducted and the sole is everted,so that in use the weight falls on the inner border. In these forms of lateral deformity the centres of motion areat the mediotarsal and subastragaloid joints. Compound Deformities.—Simple deformities, in which thefoot is persistently extended or flexed, or turned in or out, arecomparatively uncommon. More often they are combined invarying degree; thus the overextended or the overflexed foot is DEFORMITIES OF TEE FOOT. 787 usually twisted inward or outward, making four varieties ofcompound deformity: 1. Talipes Equinovarus, the extended and inverted foot. 2. Talipes Equinovalgus, the extended and everted foot. 3. Talipes Calcaneovarus, the flexed and inverted foot. 4. Talipes Calcaneovalgus, the flexed and everted foot. In the various forms of talipes the arch may be increased ordiminished in depth. It is, for example, usually increased in Fig. Congenital calcaneus. In this form (simple calcaneus) the arch is the acquired form (calcaneocavus) it is increased. calcaneus and equinus, and it is usually diminished in valgus;but this secondary or subordinate deformity is not recognizedin the ordinary classification. If the arch of the foot is simplyexaggerated, the condition is sometimes called pes cavus; if it islessened or lost, it is called pes planus. These slight degrees ofdistortion, in which the functional disability is usually moreimportant than the deformity, are rarely classed as forms oftalipes. Simple cavus, the hollow or contracted foot, and pesplanus, one of the forms of the common weak or flat-foot, havebeen described elsewhere. (Chapters XX and XXI.) 788 ORTHOPEDIC SUBGEBY. Etiology.—^From the remedial standpoint, the cause of thedeformity is of far greater importance than its form. Thus,one divides the distortions of the foot into two groups: 1. The Congenital F
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