A joint assembly for releasably securing a first and a second segment of an associated modular limb, the joint assembly comprising: a male connector including a base and a load bearing projection secured to the base of the male connector and protruding therefrom, the male connector being adapted to be secured to one of the first and second segments of the associated modular limb; a female connector including a base and a load bearing socket secured to the base of the female connector, the socket being configured to selectively receive the projection of the male connector, the female connector being adapted to be secured to the other of the first and second segments of the associated modular limb; a locking member selectively retaining the projection of the male connector in the socket of the female connector; characterised in that one of the male or the female connector includes a torsion member (37, 67) made of a resilient material for reducing a torsional stiffness of the joint assembly; the torsion member comprising one of: a toothed outer periphery for engaging knurling formed on housing of a male connector subassembly of the male connector when the male connector includes the torsion member; or a toothed inner periphery for engaging knurling formed on the body of a socket of the female connector when the female connector includes the torsion member; and wherein the male connector, the female connector, and the locking member cooperate to form a resilient and selectively releasable modular limb joint. a male connector including a base and a load bearing projection secured to the base of the male connector and protruding therefrom, the male connector being adapted to be secured to one of the first and second segments of the associated modular limb; a female connector including a base and a load bearing socket secured to the base of the female connector, the socket being configured to selectively receive the projection of the male connector, the female connector being adapted to be secured to the other of the first and second segments of the associated modular limb; a locking member selectively retaining the projection of the male connector in the socket of the female connector; characterised in that one of the male or the female connector includes a torsion member (37, 67) made of a resilient material for reducing a torsional stiffness of the joint assembly; the torsion member comprising one of: a toothed outer periphery for engaging knurling formed on housing of a male connector subassembly of the male connector when the male connector includes the torsion member; or a toothed inner periphery for engaging knurling formed on the body of a socket of the female connector when the female connector includes the torsion member; and a toothed outer periphery for engaging knurling formed on housing of a male connector subassembly of the male connector when the male connector includes the torsion member; or a toothed inner periphery for engaging knurling formed on the body of a socket of the female connector when the female connector includes the torsion member; and wherein the male connector, the female connector, and the locking member cooperate to form a resilient and selectively releasable modular limb joint.