HapticV1, PascalFrancis, Corpus, bibRecord, 001227

Representation of orientation in the somatosensory system

Identifieur interne : 001227 ( PascalFrancis/Corpus ); précédent : 001226; suivant : 001228

Representation of orientation in the somatosensory system

Auteurs : Steven S. Hsiao ; John Lane ; Paul Fitzgerald

Source :

Behavioural brain research [ 0166-4328 ] ; 2002.

RBID : Pascal:02-0583868

Descripteurs français

Pascal (Inist)
- Cortex somatosensoriel, Orientation, Attention, Sensibilité tactile, Champ récepteur, Seuil différentiel, Discrimination stimulus, Fibre nerveuse, Article synthèse, Mécanorécepteur, Récepteur sensoriel.

English descriptors

KwdEn :
- Attention, Differential threshold, Mechanoreceptor, Nerve fiber, Orientation, Receptive field, Review, Sensory receptor, Somatosensory cortex, Stimulus discrimination, Tactile sensitivity.

Abstract

In this paper we discuss how orientation is represented and transformed in the somatosensory system. Information about stimulus orientation plays an important role in sensory processing. In touch it provides critical information about how stimuli are positioned on the hand, which is important for grasping and lifting objects. It also provides important information about tactile shape. Psychophysical studies show that humans have a high capacity to discriminate the orientation of shapes and gratings indented into the finger pad. Further, these studies demonstrate that orientation discrimination is a reliable and stable method for assessing tactile spatial acuity. Neurophysiological studies suggest that orientation information is processed by the slowly adapting type I (SA1) afferent system. While orientation is poorly represented in the responses of individual afferent fibers, it is well represented in the population response properties of peripheral SA1 afferents and in the responses of central neurons in the primary (S1) and secondary (S2) somatosensory cortex. In S2, neurons with orientation selective and orientation non-selective responses tend to have large receptive fields that span multiple pads on multiple digits. Neurons in S2 that are orientation selective have similar tuning functions on different finger pads. These neurons may provide position-invariant responses or may be responsible for integrating features across hands, which is important for haptic object recognition of large shapes from the hand. Neurophysiological studies in trained animals show that the responses of about 85% of the neurons in S2 are affected by the animals focus of attention and that attention to the orientation of a bar modifies both the mean firing rate (i.e. gain) of neurons encoding orientation information and the degree of synchronous firing between pairs of neurons.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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Format Inist (serveur)

NO :	PASCAL 02-0583868 INIST
ET :	Representation of orientation in the somatosensory system
AU :	HSIAO (Steven S.); LANE (John); FITZGERALD (Paul); MOHAMMED (Abdul H.); TERENIUS (Lars)
AF :	Krieger Mind/Brain Institute, Department of Neuroscience, Johns Hopkins University/Baltimore, MD 21218/Etats-Unis (1 aut., 2 aut., 3 aut.); Department of Neurotec and Center for Molecular Medicine, Karolinska Institutet/Stockholm/Suède (1 aut., 2 aut.)
DT :	Publication en série; Niveau analytique
SO :	Behavioural brain research; ISSN 0166-4328; Coden BBREDI; Irlande; Da. 2002; Vol. 135; No. 1-2; Pp. 93-103; Bibl. 49 ref.
LA :	Anglais
EA :	In this paper we discuss how orientation is represented and transformed in the somatosensory system. Information about stimulus orientation plays an important role in sensory processing. In touch it provides critical information about how stimuli are positioned on the hand, which is important for grasping and lifting objects. It also provides important information about tactile shape. Psychophysical studies show that humans have a high capacity to discriminate the orientation of shapes and gratings indented into the finger pad. Further, these studies demonstrate that orientation discrimination is a reliable and stable method for assessing tactile spatial acuity. Neurophysiological studies suggest that orientation information is processed by the slowly adapting type I (SA1) afferent system. While orientation is poorly represented in the responses of individual afferent fibers, it is well represented in the population response properties of peripheral SA1 afferents and in the responses of central neurons in the primary (S1) and secondary (S2) somatosensory cortex. In S2, neurons with orientation selective and orientation non-selective responses tend to have large receptive fields that span multiple pads on multiple digits. Neurons in S2 that are orientation selective have similar tuning functions on different finger pads. These neurons may provide position-invariant responses or may be responsible for integrating features across hands, which is important for haptic object recognition of large shapes from the hand. Neurophysiological studies in trained animals show that the responses of about 85% of the neurons in S2 are affected by the animals focus of attention and that attention to the orientation of a bar modifies both the mean firing rate (i.e. gain) of neurons encoding orientation information and the degree of synchronous firing between pairs of neurons.
CC :	002A25F
FD :	Cortex somatosensoriel; Orientation; Attention; Sensibilité tactile; Champ récepteur; Seuil différentiel; Discrimination stimulus; Fibre nerveuse; Article synthèse; Mécanorécepteur; Récepteur sensoriel
FG :	Voie somesthésique; Encéphale; Système nerveux central; Vigilance; Psychophysique
ED :	Somatosensory cortex; Orientation; Attention; Tactile sensitivity; Receptive field; Differential threshold; Stimulus discrimination; Nerve fiber; Review; Mechanoreceptor; Sensory receptor
EG :	Somesthetic pathway; Brain (vertebrata); Central nervous system; Vigilance; Psychophysics
SD :	Corteza somatosensorial; Orientación; Atención; Sensibilidad tactil; Campo receptor; Umbral diferencial; Discriminación estímulo; Fibra nerviosa; Artículo síntesis; Mecanorreceptor; Receptor sensorial
LO :	INIST-18271.354000104957530130
ID :	02-0583868

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Pascal:02-0583868

Le document en format XML

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<front><div type="abstract" xml:lang="en">In this paper we discuss how orientation is represented and transformed in the somatosensory system. Information about stimulus orientation plays an important role in sensory processing. In touch it provides critical information about how stimuli are positioned on the hand, which is important for grasping and lifting objects. It also provides important information about tactile shape. Psychophysical studies show that humans have a high capacity to discriminate the orientation of shapes and gratings indented into the finger pad. Further, these studies demonstrate that orientation discrimination is a reliable and stable method for assessing tactile spatial acuity. Neurophysiological studies suggest that orientation information is processed by the slowly adapting type I (SA1) afferent system. While orientation is poorly represented in the responses of individual afferent fibers, it is well represented in the population response properties of peripheral SA1 afferents and in the responses of central neurons in the primary (S1) and secondary (S2) somatosensory cortex. In S2, neurons with orientation selective and orientation non-selective responses tend to have large receptive fields that span multiple pads on multiple digits. Neurons in S2 that are orientation selective have similar tuning functions on different finger pads. These neurons may provide position-invariant responses or may be responsible for integrating features across hands, which is important for haptic object recognition of large shapes from the hand. Neurophysiological studies in trained animals show that the responses of about 85% of the neurons in S2 are affected by the animals focus of attention and that attention to the orientation of a bar modifies both the mean firing rate (i.e. gain) of neurons encoding orientation information and the degree of synchronous firing between pairs of neurons.</div>
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<server><NO>PASCAL 02-0583868 INIST</NO>
<ET>Representation of orientation in the somatosensory system</ET>
<AU>HSIAO (Steven S.); LANE (John); FITZGERALD (Paul); MOHAMMED (Abdul H.); TERENIUS (Lars)</AU>
<AF>Krieger Mind/Brain Institute, Department of Neuroscience, Johns Hopkins University/Baltimore, MD 21218/Etats-Unis (1 aut., 2 aut., 3 aut.); Department of Neurotec and Center for Molecular Medicine, Karolinska Institutet/Stockholm/Suède (1 aut., 2 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Behavioural brain research; ISSN 0166-4328; Coden BBREDI; Irlande; Da. 2002; Vol. 135; No. 1-2; Pp. 93-103; Bibl. 49 ref.</SO>
<LA>Anglais</LA>
<EA>In this paper we discuss how orientation is represented and transformed in the somatosensory system. Information about stimulus orientation plays an important role in sensory processing. In touch it provides critical information about how stimuli are positioned on the hand, which is important for grasping and lifting objects. It also provides important information about tactile shape. Psychophysical studies show that humans have a high capacity to discriminate the orientation of shapes and gratings indented into the finger pad. Further, these studies demonstrate that orientation discrimination is a reliable and stable method for assessing tactile spatial acuity. Neurophysiological studies suggest that orientation information is processed by the slowly adapting type I (SA1) afferent system. While orientation is poorly represented in the responses of individual afferent fibers, it is well represented in the population response properties of peripheral SA1 afferents and in the responses of central neurons in the primary (S1) and secondary (S2) somatosensory cortex. In S2, neurons with orientation selective and orientation non-selective responses tend to have large receptive fields that span multiple pads on multiple digits. Neurons in S2 that are orientation selective have similar tuning functions on different finger pads. These neurons may provide position-invariant responses or may be responsible for integrating features across hands, which is important for haptic object recognition of large shapes from the hand. Neurophysiological studies in trained animals show that the responses of about 85% of the neurons in S2 are affected by the animals focus of attention and that attention to the orientation of a bar modifies both the mean firing rate (i.e. gain) of neurons encoding orientation information and the degree of synchronous firing between pairs of neurons.</EA>
<CC>002A25F</CC>
<FD>Cortex somatosensoriel; Orientation; Attention; Sensibilité tactile; Champ récepteur; Seuil différentiel; Discrimination stimulus; Fibre nerveuse; Article synthèse; Mécanorécepteur; Récepteur sensoriel</FD>
<FG>Voie somesthésique; Encéphale; Système nerveux central; Vigilance; Psychophysique</FG>
<ED>Somatosensory cortex; Orientation; Attention; Tactile sensitivity; Receptive field; Differential threshold; Stimulus discrimination; Nerve fiber; Review; Mechanoreceptor; Sensory receptor</ED>
<EG>Somesthetic pathway; Brain (vertebrata); Central nervous system; Vigilance; Psychophysics</EG>
<SD>Corteza somatosensorial; Orientación; Atención; Sensibilidad tactil; Campo receptor; Umbral diferencial; Discriminación estímulo; Fibra nerviosa; Artículo síntesis; Mecanorreceptor; Receptor sensorial</SD>
<LO>INIST-18271.354000104957530130</LO>
<ID>02-0583868</ID>
</server>
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Representation of orientation in the somatosensory system

Representation of orientation in the somatosensory system

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