Sensorimotor representations are essential for building up and maintaining corporeal awareness, i.e. the ability to perceive, know and evaluate one's own body as well as the bodies of others. The notion of embodied cognition implies that abstract forms of conceptual knowledge may be ultimately instantiated in such sensorimotor representations. In this sense, conceptual thinking should evoke, via mental simulation, some underlying sensorimotor events. In this review we discuss studies on the relation between embodiment and corporeal awareness. We approach the question (...) by issuing challenges from both ends. First, we ask whether bodily representations themselves can be disembodied or disconnected from underlying sensorimotor events. Second, we ask whether any concept, no matter how abstract, can actually be embodied in this way. The strong view of embodied cognition requires a negative answer to the first question, and an affirmative answer to the second. We also focus on the surprising range of cognitive processes that can be explained by linking them to corporeal awareness, such as aesthetic appreciation, and object constancy following brain damage. We conclude that (a) somatomotor simulation may help to understand the external world and the society of other individuals, but (b) some non-somatic forms of simulation may be required to explain how abstract knowledge contributes to understanding others' states. In this sense, the classic divide between sensorimotor and conceptual domains must remain in some form. (shrink)
The concept of intention can do useful work in psychological theory. Many authors have insisted on a qualitative difference between prospective and intentions regarding their type of content, with prospective intentions generally being more abstract than immediate intentions. However, we suggest that the main basis of this distinction is temporal: prospective intentions necessarily occur before immediate intention and before action itself, and often long before them. In contrast, immediate intentions occur in the specific context of the action itself. Yet both (...) types of intention share a common purpose,namely that of generating the specific information required to transform an abstract representation of a goal-state into a concrete episode of instrumental action directed towards that goal. To this extent, the content of a prospective and of an immediate intention can actually be quite similar. The main distinction between prospective and immediate intentions becomes one of when, i.e., how early on, the episodic details of an action are planned. We propose that the conscious experience associated with intentional action comes from this process of fleshing out intentions with episodic details. (shrink)
The scientific study of the human mind and brain has come of age with the advent of technologically advanced methods for imaging brain structure and activity in health and disease, plus computational theories of cognition. These advances are leading to sophisticated new accounts for how mental processes are implemented in the human brain, but they also raise new challenges. -/- Mental Processes in the Human Brain provides an integrative overview of the rapid advances and future challenges in understanding the neurobiological (...) basis of mental processes that are characteristically (and in some cases, perhaps uniquely) human, including: language; thought; understanding of others; attention; planning and decision-making; emotion; memory; prediction; and awareness itself. The book also presents the latest insights into how these various processes can break down after brain injury. With chapters from some of leading figures in the brain sciences, this book will be essential for all those in the cognitive and brain sciences. (shrink)
Time is a fundamental dimension of consciousness. Many studies of the “sense of agency” have investigated whether we attribute actions to ourselves based on a conscious experience of intention occurring prior to action, or based on a reconstruction after the action itself has occurred. Here, we ask the same question about a lower level aspect of action experience, namely awareness of the detailed spatial form of a simple movement. Subjects reached for a target, which unpredictably jumped to the side on (...) some trials. Participants (1) expressed their expectancy of a target shift during the upcoming movement, (2) pointed at the target as quickly and accurately as possible before returning to the start posiment to the target shift if required and (3) reproduced the spatial path of the movement they had just made, as accurately as possible, to give an indication of their awareness of the pointing movement. We analysed the spatial disparity between the initial and the reproduced movements on those with a target shift. A negative disparity value, or undershoot, suggests that motor awareness merely reflects a sluggish record of coordinated motor performance, while a positive value, or overshoot, suggests that participants’ intention to point to the shifting target contributes more to their awareness of action than their actual pointing movement. Undershoot and overshoot thus measure the reconstructive (motoric) and the preconstuctive (intentional) aspects of action awareness, respectively. We found that trials on which subjects strongly expected a target shift showed greater overshoot and less undershoot than trials with lower expectancy. Conscious expectancy therefore strongly influences the experience of the detailed motor parameters of our actions. Further, a delay inserted either between the expectancy judgement and the pointing movement, or between the pointing movement and the reproduction of the movement, had no effect on visuomotor adjustment but strongly influenced action awareness. Delays during either interval boosted undershoots, suggesting increased reliance on a time-limited sensory memory for action. The experience of action is thus strongly influenced by prior thoughts and expectations, but only over a short time period. Thus, awareness of our actions is a dynamic and relatively flexible mixture of what we intend to do, and what our motor system actually does. (shrink)
The control of action has traditionally been described as "automatic". In particular, movement control may occur without conscious awareness, in contrast to normal visual perception. Studies on rapid visuomotor adjustment of reaching movements following a target shift have played a large part in introducing such distinctions. We suggest that previous studies of the relation between motor performance and perceptual awareness have confounded two separate dissociations. These are: (a) the distinction between motoric and perceptual representations, and (b) an orthogonal distinction between (...) conscious and unconscious processes. To articulate these differences more clearly, we propose a new measure of motor awareness, based on subjects' ability to reproduce the spatial details of reaching movements they have just made. Here we focus on the dissociation between motor awareness and perceptual awareness that may occur when subjects make rapid visuomotor adjustments to reaching movements following a target shift. In experiment 1, motor awareness was dissociated from perceptual awareness of a target shift during reaching movement. Participants' reproduction of movement endpoints following visuomotor adjustment was independent of whether they saw the target shift or not. Experiment 2 replicated this result, and further showed that neither motor awareness nor motor performance were disrupted by TMS over the parietal cortex. The neural mechanisms underlying motor awareness, and the implications for theories of consciousness, are discussed. (shrink)
Intentional action involves both a series of neural events in the motor areas of the brain, and also a distinctive conscious experience that ''I'' am the author of the action. This paper investigates some possible ways in which these neural and phenomenal events may be related. Recent models of motor prediction are relevant to the conscious experience of action as well as to its neural control. Such models depend critically on matching the actual consequences of a movement against its internally (...) predicted effects. However, it remains unclear whether our conscious experience of action depends on a precise matching process, or a retrospective inference that ''I'' must have been responsible for a particular event. We report an experiment in which normal subjects judged the perceived time of either intentional actions, involuntary movements, or subsequent effects (auditory tones) of these. We found that the subject's intention to produce the auditory tone produced an intentional binding between the perceived times of the subject's action and the tone. However, if the intention was interrupted by an imposed involuntary movement, followed by the identical tone, no such binding occurred. The phenomenology of intentional action requires an appropriate predictive link between intentions and effects, rather than a retrospective inference that ''I'' caused the effect. (shrink)
Introspectively, the awareness of actions includes the awareness of the intentions accompanying them. Therefore, the awareness of self-generated actions might be expected to differ from the awareness of other-generated actions to the extent that access to one's own and to other's intentions differs. However, we recently showed that the perceived onset times of self- vs. other-generated actions are similar, yet both are different from comparable events that are conceived as being generated by a machine. This similarity raises two interesting possibilities. (...) First we could infer the intentions of others from their actions. Second and more radically, we could equally infer our own intentions from the actions we perform rather than sense them. We present two new experiments which investigate the role of action effects in the awareness of self- and other-generated actions by means of measuring the estimated onset time. The results show that the presence of action effects is necessary for the similarity of awareness of self- and other-generated actions. (shrink)
