What is a body representation?
What is a body representation?
It involves the perception of sensory inputs, the interpretation of these inputs in the context of a rich internal model of the body’s structure, and the use of these inputs for an on-line representation of the body in space. …
What is a homunculus in the brain?
The word “homunculus” means little man in Latin. But in neuroanatomy, the cortical homunculus represents either the motor or the sensory distribution along the cerebral cortex of the brain. While the sensory homunculus is a topographic representation of the body parts along the postcentral gyrus of the parietal lobe.
How is the body represented in the motor cortex?
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.
Why does the homunculus look so strange?
And finally, the homunculus on the sensory cortex looks barely human. It has a large representation of the face and hands compared with the torso, arms and legs. Why is this? The reason is the brain maps each sensory receptor onto the cortex rather than considering the area of the body where the sensor is located.
Do homunculi have souls?
Non-Alchemists: Because Homunculi do not have souls, they are incapable of opening the Gate inside them and are thus unable to perform alchemy.
What is the center of your brain called?
Brainstem. The brainstem (middle of brain) connects the cerebrum with the spinal cord. The brainstem includes the midbrain, the pons and the medulla.
What are the 4 motor areas of the cerebral cortex?
These areas are the primary motor cortex (Brodmann’s area 4), the premotor cortex, and the supplementary motor area (Figure 3.1).
What is the motor strip in the brain?
The area towards the back of the frontal lobe, called the motor strip, helps to control movement. In the left hemisphere, the motor strip controls movement of the right side of the body; in the right hemisphere, it controls movement of the left side of the body.
Why the motor homunculus hands lips and tongue are so big?
Many brain cells control sensation and movement of the lips so make a big lip for the homunculus. Technically, brain cells that control the tongue are found below the area that represents the lip, but to make the tongue easy to identify, we stuck it in between upper and lower lips.
Which body parts have the largest representation in the motor homunculus?
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.
Is Envy a girl or boy?
Being a homunculus, Envy technically has no sex. Although he is capable of taking the form of both male and female people, he himself is referred as a male.
Who is the most powerful homunculus?
Pride was the first and therefore the strongest of all the homunculi. Which makes sense, as traditionally pride is considered the greatest of the 7 sins, as well as having been the primary sin of Lucifer.