What is topographic organization?
What is topographic organization?
the arrangement of components in a structure, particularly the orderly spatial relationship between the distribution of neural receptors in an area of the body and a related distribution of neurons representing the same functions in cortical sensory regions of the brain.
What is another name for the somatosensory cortex?
The somatosensory cortex is a part of your brain that receives and processes sensory information from the entire body. Other names of somatosensory cortex include somesthetic area and somatic sensory area.
How is the primary cortex organized?
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. For this reason, the human hands and face have a much larger representation than the legs.
Where is the somatosensory cortex located?
The somatic sensory cortex in humans, which is located in the parietal lobe, comprises four distinct regions, or fields, known as Brodmann’s areas 3a, 3b, 1, and 2. Although area 3b is generally known as the primary somatic sensory cortex (also called SI), all four areas are involved in processing tactile information.
What is topographic representation?
From Wikipedia, the free encyclopedia. A topographic map is the ordered projection of a sensory surface, like the retina or the skin, or an effector system, like the musculature, to one or more structures of the central nervous system. Topographic maps can be found in all sensory systems and in many motor systems.
What is a motor homunculus?
The motor homunculus is a topographic representation of the body parts and its correspondents along the precentral gyrus of the frontal lobe. While the sensory homunculus is a topographic representation of the body parts along the postcentral gyrus of the parietal lobe.
What is the somatosensory cortex responsible for?
The primary somatosensory cortex is responsible for processing somatic sensations. These sensations arise from receptors positioned throughout the body that are responsible for detecting touch, proprioception (i.e. the position of the body in space), nociception (i.e. pain), and temperature.
What is the somatosensory association cortex?
The somatosensory cortex is a region of the brain which is responsible for receiving and processing sensory information from across the body, such as touch, temperature, and pain. The somatosensory cortex receives tactile information from the body, including sensations such as touch, pressure, temperature, and pain.
What order is your motor cortex Organised in?
The motor cortex is often divided into two major regions: the primary motor cortex, which is found in a gyrus known as the precentral gyrus that is positioned just in front of the central sulcus, and the nonprimary motor cortex, which is anterior to the primary motor cortex and contains two prominent regions known as …
What are association areas of the brain?
parts of the cerebral cortex that receive inputs from multiple areas; association areas integrate incoming sensory information, and also form connections between sensory and motor areas.
What is the somatosensory association area?
What is the main function of the somatosensory cortex?
The primary somatosensory cortex (S1) plays a critical role in processing afferent somatosensory input and contributes to the integration of sensory and motor signals necessary for skilled movement.