The posterior parietal cortex (PPC) is now viewed as a key area for sensory-motor integration, rather than just a sensory structure. It plays a crucial role in forming intentions, which are high-level cognitive plans for movement. The PPC contains distinct subregions dedicated to planning eye movements, reaching, and grasping. These areas are specialized for multisensory integration and coordinate transformations needed to convert sensory input into motor output. These functions are facilitated by a common distributed space representation that is independent of both sensory input and motor output. Attention and learning effects are also evident in the PPC, though they may be general to cortex and operate in the context of sensory-motor transformations. The PPC is involved in higher-level cognitive functions related to action, including early-movement planning and coordinate transformations required for sensory-guided movement. Patients with PPC lesions often suffer from optic ataxia, difficulty in estimating the location of stimuli in 3D space, and apraxias, a class of deficits characterized by the inability to plan movements. These deficits highlight the PPC's role in sensory-motor integration. Intention is an early plan for a movement, specifying the goal and type of movement. It is high-level and abstract, and can be represented in visual coordinates in some cortical areas within the PPC. Intention is also a broad category of cortical functions, including decision making and "motor attention." The PPC is involved in both sensory and movement-related responses, and occupies an intermediate stage in the sensory-motor transformation process. The distinction between intention and attention has been studied in the PPC, which is at the interface between sensory and motor systems. Experiments have shown that PPC activity reflects movement plans rather than sensory memory or attention. The PPC is involved in movement planning, and its activity is influenced by spatial attention and learning. The PPC is involved in default plans for movements when no alternative plans are formed. Studies have shown that PPC neurons can represent intended movements in eye-centered coordinates, independent of the type of movement. These findings suggest that the PPC is involved in the dynamic evolution of intention-related activity, changing from sensory to cognitive to motor as task demands change. The PPC contains intentional maps, with different subregions dedicated to saccade planning, reaching, and grasping. These maps are independent of sensory input or motor output and are used for coordinate transformations required for sensory-guided movements. The PPC is also involved in multisensory integration and coordinate transformations, and its activity is influenced by gain modulation of response fields by body-position signals. The PPC uses a common distributed code for intended movements in areas LIP and PRR, with response fields represented in eye-centered coordinates. This representation is independent of whether the targets are visual or auditory, and is used regardless of whether the output is to move the limb or make an eye movement. These findings suggest that the PPC is involved in the dynamic evolution of intention-related activity, and that its activity is influenced by gain modulation of response fields byThe posterior parietal cortex (PPC) is now viewed as a key area for sensory-motor integration, rather than just a sensory structure. It plays a crucial role in forming intentions, which are high-level cognitive plans for movement. The PPC contains distinct subregions dedicated to planning eye movements, reaching, and grasping. These areas are specialized for multisensory integration and coordinate transformations needed to convert sensory input into motor output. These functions are facilitated by a common distributed space representation that is independent of both sensory input and motor output. Attention and learning effects are also evident in the PPC, though they may be general to cortex and operate in the context of sensory-motor transformations. The PPC is involved in higher-level cognitive functions related to action, including early-movement planning and coordinate transformations required for sensory-guided movement. Patients with PPC lesions often suffer from optic ataxia, difficulty in estimating the location of stimuli in 3D space, and apraxias, a class of deficits characterized by the inability to plan movements. These deficits highlight the PPC's role in sensory-motor integration. Intention is an early plan for a movement, specifying the goal and type of movement. It is high-level and abstract, and can be represented in visual coordinates in some cortical areas within the PPC. Intention is also a broad category of cortical functions, including decision making and "motor attention." The PPC is involved in both sensory and movement-related responses, and occupies an intermediate stage in the sensory-motor transformation process. The distinction between intention and attention has been studied in the PPC, which is at the interface between sensory and motor systems. Experiments have shown that PPC activity reflects movement plans rather than sensory memory or attention. The PPC is involved in movement planning, and its activity is influenced by spatial attention and learning. The PPC is involved in default plans for movements when no alternative plans are formed. Studies have shown that PPC neurons can represent intended movements in eye-centered coordinates, independent of the type of movement. These findings suggest that the PPC is involved in the dynamic evolution of intention-related activity, changing from sensory to cognitive to motor as task demands change. The PPC contains intentional maps, with different subregions dedicated to saccade planning, reaching, and grasping. These maps are independent of sensory input or motor output and are used for coordinate transformations required for sensory-guided movements. The PPC is also involved in multisensory integration and coordinate transformations, and its activity is influenced by gain modulation of response fields by body-position signals. The PPC uses a common distributed code for intended movements in areas LIP and PRR, with response fields represented in eye-centered coordinates. This representation is independent of whether the targets are visual or auditory, and is used regardless of whether the output is to move the limb or make an eye movement. These findings suggest that the PPC is involved in the dynamic evolution of intention-related activity, and that its activity is influenced by gain modulation of response fields by