Motor Map Expansion
Motor Map Expansion - Related Videos
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Analysis of Thermal Expansion via Dilatometry
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2023
Source: J. Jacob Chavez, Ryan T. Davis, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Thermal expansion is extremely important when considering which materials will be used in systems that experience fluctuations in temperature. A high or low thermal expansion in a material may or may not be desirable, depending on the application. For instance, in a common liquid thermometer, a material with a high thermal expansion would be...
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DC Motors
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Source: Ali Bazzi, Department of Electrical Engineering, University of Connecticut, Storrs, CT. The DC machine operates with DC currents and voltages as opposed to an AC machine, which requires AC currents and voltages. DC machines were the first to be invented and utilize two magnetic fields that are controlled by DC currents. The same machine can be easily reconfigured to be a motor or generator if appropriate field excitation is available, since the DC machine has two fields termed field...
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Motor Maps
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2023
Source: Laboratories of Jonas T. Kaplan and Sarah I. Gimbel—University of Southern California One principle of brain organization is the topographic mapping of information. Especially in sensory and motor cortices, adjacent regions of the brain tend to represent information from adjacent parts of the body, resulting in maps of the body expressed on the surface of the brain. The primary sensory and motor maps in the brain surround a prominent sulcus known as the central sulcus. The cortex...
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Motor Exam II
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Source:Tracey A. Milligan, MD; Tamara B. Kaplan, MD; Neurology, Brigham and Women's/Massachusetts General Hospital, Boston, Massachusetts, USA There are two main types of reflexes that are tested on a neurological examination: stretch (or deep tendon reflexes) and superficial reflexes. A deep tendon reflex (DTR) results from the stimulation of a stretch-sensitive afferent from a neuromuscular spindle, which, via a single synapse, stimulates a motor nerve leading to a muscle contraction. DTRs...
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An Introduction to Motor Control
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Motor control involves integration and processing of sensory information by our nervous system, followed by a response through our skeletal system to perform a voluntary or involuntary action. It is vital to understand how our neuroskeletal system controls motor behavior in order to evaluate injuries pertaining to general movement, reflexes, and coordination. An improved understanding of motor control will help behavioral neuroscientists in developing useful tools to treat motor disorders, such...
FAQs
Repeated practice can expand a motor representation by strengthening and reorganizing connections among neurons in motor circuits. With continued use, more cortical cells may participate in controlling the trained action, while the representation can also become more refined. This provides a neural basis for linking experience with improved organization of movement control.
Altered sensory feedback can influence motor map expansion by changing the information available during movement. When feedback differs from ordinary experience, motor circuits may reorganize their connections as the nervous system adapts to the changed relationship between action and sensation. Researchers therefore examine sensory conditions alongside practice to determine how experience shapes cortical control of movement.
The distinction matters because a changed motor map is not interpreted only by its size. Experience may increase the number of cortical cells participating in a trained action, refine the representation, or produce both forms of reorganization. Behavioral testing helps researchers relate these organizational changes to motor learning rather than treating cortical change as an isolated finding.
These methods connect different kinds of evidence about motor learning. Cortical stimulation and neuroimaging examine changes in brain organization, whereas behavioral testing evaluates the trained movement or skill. Considering the findings together allows neuroscientists to ask whether altered cortical representations correspond with measurable learning, rather than relying on a brain measure without behavioral context.
Studies can examine experience produced by repeated practice, increased use, or altered sensory feedback and then assess the resulting organization of motor circuits. Researchers use cortical stimulation, neuroimaging, and behavioral testing to determine whether these experiences accompany changes in representation and motor learning. This approach emphasizes how conditions shape outcomes instead of describing cortical organization alone.
It is especially relevant when scientists study skill acquisition or recovery after nervous system injury. The concept connects training and use with changes in cortical organization, while rehabilitation research can use that relationship to develop strategies intended to promote functional movement. Its value lies in linking neural reorganization with outcomes that matter for performance and recovery.