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Table 1 Upper limb motor primitives

From: A unified scheme for the benchmarking of upper limb functions in neurological disorders

Motor Primitive

Definition

Idle

Holding the upper limb in a stable position without contact with any object

Stabilize

Holding a target object still. There is the grasp of a target object throughout the minimal-motion

Point-to-point reach

Reaching a target point without contact with any object

Reach for grasp

Reaching a target object and make contact with it through grasping

Transport

Moving a target object in space

Reposition

Moving away from the target object toward the idle position, without contact with any other object