The TINS Lecture The parietal association cortex in depth perception and visual control of hand action

Sakata, Hideo; Taira, Masato; Kusunoki, Makoto; Murata, Akira; Tanaka, Yuji

doi:10.1016/s0166-2236(97)01067-9

Cited by 402 publications

(232 citation statements)

References 60 publications

Supporting

Mentioning

212

Contrasting

Unclassified

Order By: Relevance

“…The parietal reaching zone of galagos may correspond to the medial intraparietal area (MIP) of macaques (32) that has been incorporated with a larger parietal reach region (PRR), which is involved in reaching (31,33). The hand-to-mouth movement zone may correspond to anterior intraparietal area (AIP) of macaques (34,35), specialized for grasping and object manipulation. These and other similarities raise the possibility of a number of homologous areas in PPC of prosimian and anthropoid primates.…”

Section: Discussionmentioning

confidence: 99%

Microstimulation reveals specialized subregions for different complex movements in posterior parietal cortex of prosimian galagos

Stepniewska

Fang²,

Kaas³

2005

Proc. Natl. Acad. Sci. U.S.A.

176

134

View full text Add to dashboard Cite

Posterior parietal cortex of prosimian galagos consists of a caudal half characterized by connections with visual cortex and a rostral half connected with motor, premotor, and visuomotor areas of frontal cortex. When 500-ms trains of electrical pulses were used to stimulate microelectrode sites throughout posterior parietal cortex, movements were elicited only from the rostral half. The movement zone reflected an overall pattern of somatotopy, from eye and face movements most ventrally to hindlimb movements most dorsally. In addition, subregions or zones of this movement cortex seemed to be devoted to components of different, ethologically significant behaviors. Thus, microstimulation within separate zones of cortex elicited reaching, hand-to-mouth, defensive, or aggressive movements. The finding of similar classes of elicited movement patterns from frontal and more recently intraparietal cortex of macaques suggests that multiareal circuits for biologically significant behaviors are components of all primate brains and that these circuits can be activated by long trains of current pulses at rostral locations in posterior parietal cortex.cortical connections ͉ intraparietal cortex ͉ motor cortex ͉ visual cortex

show abstract

Section: Discussionmentioning

confidence: 99%

Microstimulation reveals specialized subregions for different complex movements in posterior parietal cortex of prosimian galagos

Stepniewska

Fang²,

Kaas³

2005

Proc. Natl. Acad. Sci. U.S.A.

176

134

View full text Add to dashboard Cite

show abstract

“…This indicates that the attentional shift may stem from a coding strategy whereby the features of the target are labelled as a single entity. Such a strategy may be crucial for the control of motor actions but, assuming it takes place in the visuomotor stream (Milner & Goodale 1995;Sakata et al 1997), would not necessarily lead to object recognition. We suggest that cooperative activity between the visuomotor and perceptual streams, as has been postulated for ef cient and coordinated actions within our environment (Milner & Goodale 1995), may not be necessary if the encoded features of a target were agged as a single entity within the visuomotor stream.…”

Section: Discussionmentioning

confidence: 99%

Attentional processes link perception and action

Anderson

Yamagishi²,

Karavia

2002

Proc. R. Soc. Lond. B

View full text Add to dashboard Cite

Behavioural studies on normal and brain-damaged individuals provide convincing evidence that the perception of objects results in the generation of both visual and motor signals in the brain, irrespective of whether or not there is an intention to act upon the object. In this paper we sought to determine the basis of the motor signals generated by visual objects. By examining how the properties of an object affect an observer's reaction time for judging its orientation, we provide evidence to indicate that directed visual attention is responsible for the automatic generation of motor signals associated with the spatial characteristics of perceived objects.

show abstract

“…In addition, this region has very significant recurrent cortico-cortical projections with area F5 (Matelli, 1994;Sakata, 1997). In their computational model for primate control of grasping (the FARS -Fagg-Arbib-Rizzolatti-Sakata -model), Fagg and Arbib (1998) analyzed these findings of Sakata and Rizzolatti to show how F5 and AIP may act as part of a visuo-motor transformation circuit, which carries the brain from sight of an object to the execution of a particular grasp.…”

Section: The Fars Model Of Parietal-premotor Interactions In Graspingmentioning

confidence: 99%

Schema design and implementation of the grasp-related mirror neuron system

Öztop

Arbib

2002

Biological Cybernetics

263

194

View full text Add to dashboard Cite

Mirror neurons within a monkey's premotor area F5 fire not only when the monkey performs a certain class of action but also when the monkey observes another monkey (or the experimenter) perform a similar action (Gallese et al. 1996;Rizzolatti et al. 1996a) . It has thus been argued that these neurons are crucial for understanding of actions by others. We offer the Hand-State Hypothesis as a new explanation of the evolution of this capability, hypothesizing that these neurons first evolved to augment the "canonical" F5 neurons (active during self-movement based on observation of an object) by providing visual feedback on "hand state", relating the shape of the hand to the shape of the object. We then introduce the MNS (Mirror Neuron System) model of F5 and related brain regions. The existing FARS (Fagg-Arbib-Rizzolatti-Sakata) model (Fagg and Arbib 1998) represents circuitry for visually-guided grasping of objects, linking parietal area AIP with F5 canonical neurons. The MNS model extends the AIP visual pathway by also modeling pathways, directed toward F5 mirror neurons, which match arm-hand trajectories to the affordances and location of a potential target object. We present the basic schemas for the MNS model, then aggregate them into three "grand schemas" − Visual Analysis of Hand State, Reach and Grasp, and the Core Mirror Circuit − for each of which we present a useful implementation. With this implementation we show how the mirror system may learn to recognize actions already in the repertoire of the F5 canonical neurons. We show that the connectivity pattern of mirror neuron circuitry can be established through training, and that the resultant network can exhibit a range of novel, physiologically interesting, behaviors during the process of action recognition. We train the system on the basis of final grasp but then observe the whole time course of mirror neuron activity, yielding predictions for neurophysiological experiments under conditions of spatial perturbation, altered kinematics, and ambiguous grasp execution which highlight the importance of the timing of mirror neuron activity.

show abstract

The TINS Lecture The parietal association cortex in depth perception and visual control of hand action

Cited by 402 publications

References 60 publications

Microstimulation reveals specialized subregions for different complex movements in posterior parietal cortex of prosimian galagos

Microstimulation reveals specialized subregions for different complex movements in posterior parietal cortex of prosimian galagos

Attentional processes link perception and action

Schema design and implementation of the grasp-related mirror neuron system

Contact Info

Product

Resources

About