Primary Motor Area

Primary Motor Area

The primary motor cortex 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. The primary motor cortex contains a rough map of the body, with different body parts controlled by partially overlapping regions of cortex arranged 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. Each cerebral hemisphere contains a map that controls mainly the opposite side of the body.

For the discovery of the primary motor cortex and its relationship to other motor cortical areas, see the main article on the motor cortex.

Read more about Primary Motor Area:  Location, Homunculus: The "little Person", Alternative Maps, Common Misconceptions, Pathway, Blood Supply, Neural Input From The Thalamus, Pathology

Other articles related to "motor, primary motor area, motors":

British Motor Holdings
... British Motor Holdings Limited (BMH) was a short-lived British motor company formed as a result of the merging of British Motor Corporation Limited (BMC) and Jaguar on 14 ... Thirteen months later on 17 January 1968 BMH merged with Leyland Motor Corporation to form the British Leyland Motor Corporation (BLMC) ...
Primary Motor Area - Pathology
... Lesions of the precentral gyrus result in paralysis of the contralateral side of the body (facial palsy, arm-/leg monoparesis, hemiparesis) - see upper motor neuron. ...
British Motor Holdings - History
... in decline and decided that the remedy was to promote more mergers, particularly in the motor industry ... already buying into the Rootes Group, Leyland Motors had acquired Standard Triumph and Rover and had become a major automotive force ... The British Motor Corporation (BMC) was suffering a dramatic drop in its share of the home market ...
Not Quite C - Simple Program Example
... A simple test program written in NQC for an RCX with a motor connected to output port A could look like this task main // main program { SetPower(OUT_A, OUT_FULL ...
Stepper Motor
... A stepper motor (or step motor) is a brushless DC electric motor that divides a full rotation into a number of equal steps ... The motor's position can then be commanded to move and hold at one of these steps without any feedback sensor (an open-loop controller), as long as the motor is carefully sized to ... Switched reluctance motors are very large stepping motors with a reduced pole count, and generally are closed-loop commutated ...

Famous quotes containing the words area, primary and/or motor:

    Whether we regard the Women’s Liberation movement as a serious threat, a passing convulsion, or a fashionable idiocy, it is a movement that mounts an attack on practically everything that women value today and introduces the language and sentiments of political confrontation into the area of personal relationships.
    Arianna Stassinopoulos (b. 1950)

    What had begun as a movement to free all black people from racist oppression became a movement with its primary goal the establishment of black male patriarchy.
    bell hooks (b. c. 1955)

    We disparage reason.
    But all the time it’s what we’re most concerned with.
    There’s will as motor and there’s will as brakes.
    Reason is, I suppose, the steering gear.
    Robert Frost (1874–1963)