Evaluation and biomechanics of the first ray in the patient with limited motion.

Adequate first ray function is essential to healthy human gait. Controversies still exist about aspects of human structure and function and many newer answers and theories have been proposed by a new generation of experts. Examples include the sagittal plane facilitation, tissue stress, and preferred movement pathway theories.

Poststreptococcal reactive arthritis.

Acute rheumatic fever is a delayed inflammatory disease that follows streptococcal infection of the throat. Poststreptococcal reactive arthritis is a sterile arthritis associated with antecedent streptococcal infection in patients not fulfilling the Jones criteria for acute rheumatic fever. Poststreptococcal reactive arthritis has been reported to have lower-extremity predominance and, therefore, should be included in the differential diagnosis of patients with lower-extremity arthritis.