RESUMO
Claw toe deformity after posterior leg compartment syndrome is rare but incapacitating. When the mechanism is flexor digitorum longus (FDL) shortening due to ischemic contracture of the muscle after posterior leg syndrome, a good treatment option is the Valtin procedure in which the flexor digitorum brevis (FDB) is transferred to the FDL after FDL tenotomy. The Valtin procedure reduces the deformity by lengthening and reactivating the FDL. Here, we report the outcomes of FDB to FDL transfer according to Valtin in 10 patients with posttraumatic claw toe deformity treated a mean of 34 months after the injury. Toe flexion was restored in all 10 patients, with no claw toe deformity even during dorsiflexion of the ankle.
Assuntos
Traumatismos do Tornozelo/complicações , Deformidades do Pé/cirurgia , Síndrome do Dedo do Pé em Martelo/cirurgia , Músculo Esquelético/cirurgia , Transferência Tendinosa/métodos , Dedos do Pé/cirurgia , Adolescente , Adulto , Idoso , Traumatismos do Tornozelo/fisiopatologia , Traumatismos do Tornozelo/cirurgia , Feminino , Deformidades do Pé/etiologia , Síndrome do Dedo do Pé em Martelo/etiologia , Humanos , Masculino , Pessoa de Meia-Idade , Amplitude de Movimento Articular , Dedos do Pé/lesões , Adulto JovemRESUMO
Plant sugars are often considered as primary feeding stimuli, conditioning host plant acceptance by herbivorous insects. Of the nine sugars identified from methanolic extracts of seven grass species, only turanose, a sucrose isomer, was negatively correlated with the survival and growth of the noctuid larva of cereal stemborer, Busseola fusca. Sucrose was the most abundant sugar, although it did not vary significantly in concentration among the plant species studied. Using Styrofoam™ cylinders impregnated with increasing concentrations of turanose or sucrose, the two sugars had opposing effects: turanose appeared phagodeterrent while sucrose was phagostimulatory. Electrophysiological studies indicated that B. fusca larvae were able to detect both sugars via their styloconic sensilla located on the mouthparts. The findings indicate that, whereas sucrose is a feeding stimulant and positively influences food choice by B. fusca larvae, turanose negatively contributes to larval food choice. The balance in concentrations of both sugars, however, somehow influences the overall host plant choice made by the larvae. This can partly explain host plant suitability and choice by this caterpillar pest in the field.
