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Encyclopedia > Cortical homunculus

Basic Definition

Specifically: A physical representation of the primary sensorimotor cortex, i.e., the portion of the human brain directly responsible for the movement and exchange of sense and motor information (namely touch: sensitivity, cold, heat, pain etc.) of the rest of the body.


The resulting image is a grotesquely disfigured human with diproportionately huge hands, lips, and face in comparison to the rest of the body. Because of the fine motor skills and sense nerves found in these particular parts of the body they are represented as being larger on the homunculus. A part of the body with fewer sensory and/or motor connections to the brain is represented to appear smaller.


The Cortical Homunculus is a visual representation of the concept of "the body within the brain" that one's hand or face exists as much as a series of nerve structures or a "neuron concept" as it does a physical form. This concept relates to many neuro-biological phenomena including "phantom limb". This article needs to be cleaned up to conform to a higher standard of quality. ...


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Sensorimotor Cortex[1]


See Also: Homunculus Hartsoekers homunculus The concept of a homunculus (Latin for little man, sometimes spelled homonculus) is often used to illustrate the functioning of a system. ...


  Results from FactBites:
 
US Bazaar.com : Encyclopedia Pages : Homunculus (4841 words)
The homunculus is also commonly used to describe the distorted human figure drawn to reflect the relative space our body parts occupy on the somatosensory cortex (sensory homunculus) and the motor cortex (motor homunculus).
A homunculus called Twigleg is one of the main characters of the 1997 children novel Dragon Rider by German author Cornelia Funke.
The Homunculus is a false body that can be inhabited by a willing mind in Sean Williams' book series The Books of the Cataclysm, once a soul has entered the homunculus it will morph to appear as that person, but is stronger and more durable than a normal human body.
Homunculus (2696 words)
For instance, the homunculus continues to be considered as one of the major theories on the origin of consciousness, that there is a part (or process) in the brain whose purpose is to be "you".
Homunculus arguments are common in the theory of vision.
The homunculus argument applied to Ryle's theory would be phrased in terms of whether the mental attribute of 'reflecting upon things internally' can be explained by the theory that 'the mind is intelligent acts' without the appearance of a homunculus.
  More results at FactBites »

 
 

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