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Related Concept Videos

Implicit Memories01:24

Implicit Memories

Implicit memories, also known as non-declarative memories, are long-term memories that function outside of conscious awareness. These memories influence behavior and skills without explicit knowledge. This type of memory is evident in tasks like playing tennis, snowboarding, and texting. Implicit memory has three subsystems: procedural memory, conditioning, and priming. This type of memory is essential in various activities, from everyday tasks to specialized skills.
One key aspect of implicit...
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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex.
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at the...
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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the cerebellum's...
Hierarchy of Motor Control01:18

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The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
Direct Motor Pathways01:11

Direct Motor Pathways

The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and the...

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Related Experiment Video

Updated: May 20, 2026

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task
10:39

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task

Published on: May 3, 2018

Primary motor and premotor cortex in implicit sequence learning--evidence for competition between implicit and

Shailesh S Kantak1, Chaithanya K Mummidisetty, James W Stinear

  • 1Neuroplasticity Laboratory, Sensory Motor Performance Program, Rehabilitation Institute of Chicago, Chicago, IL, USA. sskantak@gmail.com

The European Journal of Neuroscience
|July 5, 2012
PubMed
Summary

Anodal transcranial direct current stimulation (AtDCS) over the primary motor cortex (M1) enhances implicit motor learning. However, stimulating the dorsal premotor cortex (PMd) may hinder the consolidation of implicit motor skills.

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Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

Published on: February 23, 2020

Area of Science:

  • Neuroscience
  • Motor Control
  • Cognitive Psychology

Background:

  • Implicit and explicit motor memory systems interact and compete during motor skill acquisition.
  • The primary motor cortex (M1) is associated with implicit learning, while the dorsal premotor cortex (PMd) is linked to explicit learning.

Purpose of the Study:

  • To investigate the neural mechanisms underlying the competition between implicit and explicit motor memory systems.
  • To determine the effects of modulating M1 and PMd activity on implicit motor sequence learning.

Main Methods:

  • A randomized crossover experiment using anodal transcranial direct current stimulation (AtDCS) over M1, PMd, or sham.
  • Participants practiced an implicit motor sequence task (serial reaction time task, SRTT).
  • Performance was assessed at baseline, end of acquisition (EoA), and 24-hour retention (RET).

Main Results:

  • M1-AtDCS significantly improved online performance and offline stabilization of the implicit motor sequence compared to sham stimulation.
  • PMd-AtDCS during practice attenuated offline stabilization of the implicit motor sequence compared to M1-AtDCS and sham.
  • These findings highlight the distinct roles of M1 and PMd in motor learning consolidation.

Conclusions:

  • The primary motor cortex (M1) plays a crucial role in both online performance gains and offline stabilization of implicit motor sequence learning.
  • Enhancing activity in explicit motor memory areas like the dorsal premotor cortex (PMd) during practice can be detrimental to the consolidation of implicit motor learning.
  • The results support the concept of competition between implicit and explicit motor memory systems, identifying key neural substrates involved.