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- Primary_motor_cortex abstract "The primary motor cortex (Brodmann area 4) is a brain region that in humans is located in the posterior portion of the frontal lobe. It works in association with other motor areas including premotor cortex, the supplementary motor area, posterior parietal cortex, and several subcortical brain regions, to plan and execute movements. Primary motor cortex is defined anatomically as the region of cortex that contains large neurons known as Betz cells. Betz cells, along with other cortical neurons, send long axons down the spinal cord to synapse onto the interneuron circuitry of the spinal cord and also directly onto the alpha motor neurons in the spinal cord which connect to the muscles. At the primary motor cortex, motor representation is orderly arranged (in an inverted fashion) from the toe (at the top of the cerebral hemisphere) to mouth (at the bottom) along a fold in the cortex called the central sulcus. However, some body parts may be controlled by partially overlapping regions of cortex. Each cerebral hemisphere of the primary motor cortex only contains a motor representation of the opposite (contralateral) side of the body. The amount of primary motor cortex devoted to a body part is not proportional to the absolute size of the body surface, but, instead, to the relative density of cutaneous motor receptors on said body part. The density of cutaneous motor receptors on the body part is generally indicative of the necessary degree of precision of movement required at that body part. For this reason, the human hands and face have a much larger representation than the legs.For the discovery of the primary motor cortex and its relationship to other motor cortical areas, see the main article on the motor cortex.".
- Primary_motor_cortex artery Anterior_cerebral_artery.
- Primary_motor_cortex artery Middle_cerebral_artery.
- Primary_motor_cortex brainInfoNumber "421".
- Primary_motor_cortex brainInfoType "ancil".
- Primary_motor_cortex grayPage "821".
- Primary_motor_cortex graySubject "189".
- Primary_motor_cortex isPartOfAnatomicalStructure Primary_motor_cortex.
- Primary_motor_cortex meshName "Motor+Cortex".
- Primary_motor_cortex meshNumber "A08.186.211.730.885.213.270.548".
- Primary_motor_cortex thumbnail Ba4.png?width=300.
- Primary_motor_cortex wikiPageExternalLink a_06_cr_mou.html.
- Primary_motor_cortex wikiPageID "23631964".
- Primary_motor_cortex wikiPageRevisionID "605027481".
- Primary_motor_cortex artery Anterior_cerebral_artery.
- Primary_motor_cortex artery "Middle cerebral".
- Primary_motor_cortex braininfonumber "421".
- Primary_motor_cortex braininfotype "ancil".
- Primary_motor_cortex caption "Brodmann area 4 of human brain.".
- Primary_motor_cortex caption "Primary motor cortex labeled as somatomotor cortex.".
- Primary_motor_cortex graypage "821".
- Primary_motor_cortex graysubject "189".
- Primary_motor_cortex hasPhotoCollection Primary_motor_cortex.
- Primary_motor_cortex image "Cerebrum lobes.svg".
- Primary_motor_cortex ispartof Primary_motor_cortex.
- Primary_motor_cortex latin "cortex motorius primus".
- Primary_motor_cortex meshname "Motor+Cortex".
- Primary_motor_cortex meshnumber "A08.186.211.730.885.213.270.548".
- Primary_motor_cortex name "Primary motor cortex".
- Primary_motor_cortex wordnet_type synset-brain-noun-1.
- Primary_motor_cortex subject Category:Cerebrum.
- Primary_motor_cortex subject Category:Motor_system.
- Primary_motor_cortex subject Category:Neuroanatomy.
- Primary_motor_cortex type BodyPart105220461.
- Primary_motor_cortex type Brain105481095.
- Primary_motor_cortex type NeuralStructure105462674.
- Primary_motor_cortex type Part109385911.
- Primary_motor_cortex type PhysicalEntity100001930.
- Primary_motor_cortex type Structure105225602.
- Primary_motor_cortex type Thing100002452.
- Primary_motor_cortex type AnatomicalStructure.
- Primary_motor_cortex type Brain.
- Primary_motor_cortex type AnimalBodyPart.
- Primary_motor_cortex type Brain.
- Primary_motor_cortex type BiologicalObject.
- Primary_motor_cortex comment "The primary motor cortex (Brodmann area 4) is a brain region that in humans is located in the posterior portion of the frontal lobe. It works in association with other motor areas including premotor cortex, the supplementary motor area, posterior parietal cortex, and several subcortical brain regions, to plan and execute movements. Primary motor cortex is defined anatomically as the region of cortex that contains large neurons known as Betz cells.".
- Primary_motor_cortex label "Corteza motora primaria".
- Primary_motor_cortex label "Córtex motor primário".
- Primary_motor_cortex label "Primary motor cortex".
- Primary_motor_cortex label "Прецентральная извилина".
- Primary_motor_cortex label "一次運動野".
- Primary_motor_cortex sameAs Corteza_motora_primaria.
- Primary_motor_cortex sameAs 一次運動野.
- Primary_motor_cortex sameAs Córtex_motor_primário.
- Primary_motor_cortex sameAs m.07gfz3.
- Primary_motor_cortex sameAs Q18707.
- Primary_motor_cortex sameAs Q18707.
- Primary_motor_cortex sameAs Primary_motor_cortex.
- Primary_motor_cortex wasDerivedFrom Primary_motor_cortex?oldid=605027481.
- Primary_motor_cortex depiction Ba4.png.
- Primary_motor_cortex isPrimaryTopicOf Primary_motor_cortex.
- Primary_motor_cortex name "Primary motor cortex".
- Primary_motor_cortex name "cortex motorius primus".