Flexor digitorum brevis flexes the middle phalanges. The hand is broad with short metacarpals and phalanges, and a trident configuration. The "A. anamensis" hand portrays robust phalanges and metacarpals, and long middle phalanges. Acroosteolysis is resorption of the distal bony phalanges. Dorsal branches innervates the distal phalanges of the index, middle, and half ring fingers. Their distal attachment is on the bases of the proximal phalanges of the second-fourth digits. In contrast, digitigrade animals walk on their distal and intermediate phalanges. They have short and squat proximal phalanges with much longer terminal phalanges. They insert by tendons to the phalanges of the fingers. The terminal phalanges were fused claws. The brevis acts to plantar flex the middle phalanges. The second finger had three phalanges (finger bones). Neutrophils display highly directional amoeboid motility in infected footpad and phalanges. They have intercalary cartilage between their last two phalanges. In this body weight is borne on the back of the proximal phalanges.