How Somatotopic is the Motor Cortex Hand Area?
The primary motor cortex (M1) is thought to control movements of different body parts from somatotopically organized cortical territories. Electrical stimulation suggests, however, that territories controlling different fingers overlap. Such overlap might be artifactual or else might indicate that a...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 1993-07, Vol.261 (5120), p.489-492 |
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| creator | Schieber, Marc H. Hibbard, Lyndon S. |
| description | The primary motor cortex (M1) is thought to control movements of different body parts from somatotopically organized cortical territories. Electrical stimulation suggests, however, that territories controlling different fingers overlap. Such overlap might be artifactual or else might indicate that activation of M1 to produce a finger movement occurs over a more widespread cortical area than usually assumed. These possibilities were distinguished in monkeys moving different fingers. Recordings showed that single M1 neurons were active with movements of different fingers. Neuronal populations active with movements of different fingers overlapped extensively. Control of any finger movement thus appears to utilize a population of neurons distributed throughout the M1 hand area rather than a somatotopically segregated population. |
| doi_str_mv | 10.1126/science.8332915 |
| format | Article |
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Electrical stimulation suggests, however, that territories controlling different fingers overlap. Such overlap might be artifactual or else might indicate that activation of M1 to produce a finger movement occurs over a more widespread cortical area than usually assumed. These possibilities were distinguished in monkeys moving different fingers. Recordings showed that single M1 neurons were active with movements of different fingers. Neuronal populations active with movements of different fingers overlapped extensively. Control of any finger movement thus appears to utilize a population of neurons distributed throughout the M1 hand area rather than a somatotopically segregated population.</description><identifier>ISSN: 0036-8075</identifier><identifier>EISSN: 1095-9203</identifier><identifier>DOI: 10.1126/science.8332915</identifier><identifier>PMID: 8332915</identifier><identifier>CODEN: SCIEAS</identifier><language>eng</language><publisher>Washington, DC: American Society for the Advancement of Science</publisher><subject>Animals ; Biological and medical sciences ; Brain ; Brain Mapping ; Centroids ; Fingers ; Fingers - innervation ; Fingers - physiology ; Fundamental and applied biological sciences. Psychology ; Hand - innervation ; Hands ; Localization (Brain function) ; Localization of functions ; Macaca mulatta ; Motor control and motor pathways. Reflexes. Control centers of vegetative functions. 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Electrical stimulation suggests, however, that territories controlling different fingers overlap. Such overlap might be artifactual or else might indicate that activation of M1 to produce a finger movement occurs over a more widespread cortical area than usually assumed. These possibilities were distinguished in monkeys moving different fingers. Recordings showed that single M1 neurons were active with movements of different fingers. Neuronal populations active with movements of different fingers overlapped extensively. Control of any finger movement thus appears to utilize a population of neurons distributed throughout the M1 hand area rather than a somatotopically segregated population.</description><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Brain</subject><subject>Brain Mapping</subject><subject>Centroids</subject><subject>Fingers</subject><subject>Fingers - innervation</subject><subject>Fingers - physiology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Hand - innervation</subject><subject>Hands</subject><subject>Localization (Brain function)</subject><subject>Localization of functions</subject><subject>Macaca mulatta</subject><subject>Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration</subject><subject>Motor cortex</subject><subject>Motor Cortex - cytology</subject><subject>Motor Cortex - physiology</subject><subject>Movement</subject><subject>Neurology</subject><subject>Neurons</subject><subject>Neurons - physiology</subject><subject>Neuroscience</subject><subject>Population distributions</subject><subject>Thumb</subject><subject>Vertebrates: nervous system and sense organs</subject><subject>Wrist</subject><issn>0036-8075</issn><issn>1095-9203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqN0s-LEzEUB_AgytpdPXtRmIOIh51ufk0mc5JatF2o9rDqNbzJvKmzzExqMsX1vzdLh0qhYMkhJN9PEsh7hLxidMoYVzfBNthbnGoheMGyJ2TCaJGlBafiKZlQKlSqaZ49J5ch3FMas0JckIuRT8h06X4nd66DwQ1u29ikCcnwE5MvcemTufMDPiRL6Ktk5hE-vCDPamgDvhznK_L986dv82W6Wi9u57NVanMmhlRqBVwBLUtFaQ6VxEKUWkltoapz1FzmoLXiEnQuitryWhe2BCUQBMtULa7Iu_29W-9-7TAMpmuCxbaFHt0umDzTQvNM_hcyVahcaxbh9R5uoEXT9LUbPNgN9uihdT3WTdyeMZmpXFEReXqCx1Fh19hT_v2RjyT-3LCBXQjm9u7r2XT942z6cXEu1YvVEb0-Ra1rW9ygiYWcr4_4zZ5b70LwWJutbzrwfwyj5rEJzdiEZuyqeOLNWJRd2WF18P_yt2MOwUJbe-htEw5Maqky8fjw6z27D7EZDzGP5SwkF38BgULnyg</recordid><startdate>19930723</startdate><enddate>19930723</enddate><creator>Schieber, Marc H.</creator><creator>Hibbard, Lyndon S.</creator><general>American Society for the Advancement of Science</general><general>American Association for the Advancement of Science</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8GL</scope><scope>IBG</scope><scope>IOV</scope><scope>ISN</scope><scope>7TK</scope><scope>7X8</scope></search><sort><creationdate>19930723</creationdate><title>How Somatotopic is the Motor Cortex Hand Area?</title><author>Schieber, Marc H. ; Hibbard, Lyndon S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c713t-486a26a0bb6007ad4e93b8648cadf7e8247a88624a8739fc2f89cba63ea3156f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Brain</topic><topic>Brain Mapping</topic><topic>Centroids</topic><topic>Fingers</topic><topic>Fingers - innervation</topic><topic>Fingers - physiology</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Hand - innervation</topic><topic>Hands</topic><topic>Localization (Brain function)</topic><topic>Localization of functions</topic><topic>Macaca mulatta</topic><topic>Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration</topic><topic>Motor cortex</topic><topic>Motor Cortex - cytology</topic><topic>Motor Cortex - physiology</topic><topic>Movement</topic><topic>Neurology</topic><topic>Neurons</topic><topic>Neurons - physiology</topic><topic>Neuroscience</topic><topic>Population distributions</topic><topic>Thumb</topic><topic>Vertebrates: nervous system and sense organs</topic><topic>Wrist</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Schieber, Marc H.</creatorcontrib><creatorcontrib>Hibbard, Lyndon S.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Gale In Context: High School</collection><collection>Gale In Context: Biography</collection><collection>Gale In Context: Opposing Viewpoints</collection><collection>Gale In Context: Canada</collection><collection>Neurosciences Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Science (American Association for the Advancement of Science)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Schieber, Marc H.</au><au>Hibbard, Lyndon S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>How Somatotopic is the Motor Cortex Hand Area?</atitle><jtitle>Science (American Association for the Advancement of Science)</jtitle><addtitle>Science</addtitle><date>1993-07-23</date><risdate>1993</risdate><volume>261</volume><issue>5120</issue><spage>489</spage><epage>492</epage><pages>489-492</pages><issn>0036-8075</issn><eissn>1095-9203</eissn><coden>SCIEAS</coden><abstract>The primary motor cortex (M1) is thought to control movements of different body parts from somatotopically organized cortical territories. Electrical stimulation suggests, however, that territories controlling different fingers overlap. Such overlap might be artifactual or else might indicate that activation of M1 to produce a finger movement occurs over a more widespread cortical area than usually assumed. These possibilities were distinguished in monkeys moving different fingers. Recordings showed that single M1 neurons were active with movements of different fingers. Neuronal populations active with movements of different fingers overlapped extensively. Control of any finger movement thus appears to utilize a population of neurons distributed throughout the M1 hand area rather than a somatotopically segregated population.</abstract><cop>Washington, DC</cop><pub>American Society for the Advancement of Science</pub><pmid>8332915</pmid><doi>10.1126/science.8332915</doi><tpages>4</tpages></addata></record> |
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| identifier | ISSN: 0036-8075 |
| ispartof | Science (American Association for the Advancement of Science), 1993-07, Vol.261 (5120), p.489-492 |
| issn | 0036-8075 1095-9203 |
| language | eng |
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| source | American Association for the Advancement of Science; Jstor Complete Legacy; MEDLINE |
| subjects | Animals Biological and medical sciences Brain Brain Mapping Centroids Fingers Fingers - innervation Fingers - physiology Fundamental and applied biological sciences. Psychology Hand - innervation Hands Localization (Brain function) Localization of functions Macaca mulatta Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration Motor cortex Motor Cortex - cytology Motor Cortex - physiology Movement Neurology Neurons Neurons - physiology Neuroscience Population distributions Thumb Vertebrates: nervous system and sense organs Wrist |
| title | How Somatotopic is the Motor Cortex Hand Area? |
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