A prosthetic digit (120, 220, 300, 400, 1800, 1900) comprising: a mount (350, 410, 510, 610, 1810, 1910) configured to attach to a hand; a proximal segment (320, 420, 1820, 1920) a middle segment (330, 430, 1830, 1930), and a distal segment (340, 440, 1840, 1940), with the proximal segment (320, 420, 1820, 1920) rotatably attached to the mount (350, 410, 510, 610, 1810, 1910), and the middle segment (330, 430, 1830, 1930) rotatably attached to the proximal segment (320, 420, 1820, 1920) and the distal segment (340, 440, 1840, 1940); a link (360, 450, 1860, 1960) rotatably attached to the mount (350, 410, 510, 610, 1810, 1910) and rotatably attached to the middle segment (330, 430, 1830, 1930), the link (360, 450, 1860, 1960) comprising a flexible portion at a distal portion thereof and configured to flex in response to a threshold rotational force applied to the prosthetic digit (120, 220, 300, 400, 1800, 1900); and an actuator (301, 404, 501, 601, 700, 701, 800, 1600, 1804, 1904) coupled with the mount (350, 410, 510, 610, 1810, 1910) and configured to rotate the proximal segment (320, 420, 1820, 1920) via the drive side, wherein the actuator (301, 404, 501, 601, 700, 701, 800, 1600, 1804, 1904) comprises a motor (305, 405, 505, 605, 760, 1015, 1660, 1815, 1915) and a gearbox (512, 612, 710, 900A-F, 1610, 1903) in parallel and mechanically connected by one or more transfer gears (1992A-C), characterized in that the proximal segment (320, 420, 1820, 1920) has a drive side configured to be actuated to rotate the proximal segment (320, 420, 1820, 1920) and a support side configured to provide rotational resistance to the prosthetic digit (120, 220, 300, 400, 1800, 1900) in response to a threshold lateral load applied to the prosthetic digit (120, 220, 300, 400, 1800, 1900). a mount (350, 410, 510, 610, 1810, 1910) configured to attach to a hand; a proximal segment (320, 420, 1820, 1920) a middle segment (330, 430, 1830, 1930), and a distal segment (340, 440, 1840, 1940), with the proximal segment (320, 420, 1820, 1920) rotatably attached to the mount (350, 410, 510, 610, 1810, 1910), and the middle segment (330, 430, 1830, 1930) rotatably attached to the proximal segment (320, 420, 1820, 1920) and the distal segment (340, 440, 1840, 1940); a link (360, 450, 1860, 1960) rotatably attached to the mount (350, 410, 510, 610, 1810, 1910) and rotatably attached to the middle segment (330, 430, 1830, 1930), the link (360, 450, 1860, 1960) comprising a flexible portion at a distal portion thereof and configured to flex in response to a threshold rotational force applied to the prosthetic digit (120, 220, 300, 400, 1800, 1900); and an actuator (301, 404, 501, 601, 700, 701, 800, 1600, 1804, 1904) coupled with the mount (350, 410, 510, 610, 1810, 1910) and configured to rotate the proximal segment (320, 420, 1820, 1920) via the drive side, wherein the actuator (301, 404, 501, 601, 700, 701, 800, 1600, 1804, 1904) comprises a motor (305, 405, 505, 605, 760, 1015, 1660, 1815, 1915) and a gearbox (512, 612, 710, 900A-F, 1610, 1903) in parallel and mechanically connected by one or more transfer gears (1992A-C), characterized in that the proximal segment (320, 420, 1820, 1920) has a drive side configured to be actuated to rotate the proximal segment (320, 420, 1820, 1920) and a support side configured to provide rotational resistance to the prosthetic digit (120, 220, 300, 400, 1800, 1900) in response to a threshold lateral load applied to the prosthetic digit (120, 220, 300, 400, 1800, 1900).