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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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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....
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Somatosensory, Motor, and Association Cortex01:24

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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...
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Association Areas of the Cortex01:21

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Higher Mental Functions of Brain: Learning and Memory01:26

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Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or...
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Associative Learning01:27

Associative Learning

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Associative learning is a fundamental concept in behavioral psychology, wherein a connection is established between two stimuli or events, leading to a learned response. This process is critical in understanding how behaviors are acquired and modified. Conditioning, the mechanism through which associations are formed, can be divided into two main types: classical conditioning and operant conditioning, each elucidating different aspects of associative learning.
Classical conditioning, also known...
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Direct Motor Pathways01:11

Direct Motor Pathways

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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...
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Related Experiment Video

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Study Motor Skill Learning by Single-pellet Reaching Tasks in Mice
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Cell-type-specific responses to associative learning in the primary motor cortex.

Candice Lee1, Emerson F Harkin1, Xuming Yin1

  • 1Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada.

Elife
|February 3, 2022
PubMed
Summary

Different brain cells in the primary motor cortex (M1) show unique responses to cues and rewards. These responses change after learning, suggesting cell-type-specific roles in motor skill acquisition.

Keywords:
inhibitory neuronsmotor cortexmouseneurosciencetwo-photon calcium imaging

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Motor Control

Background:

  • The primary motor cortex (M1) is crucial for movement and learning.
  • M1 exhibits reward-related activity, aiding reward-based motor learning.
  • Understanding cell-type-specific reward signaling in M1 is unclear.

Purpose of the Study:

  • Investigate reward and cue signal representation across M1 neuronal cell types.
  • Determine how these signals change after associative learning.
  • Elucidate the role of cell-type-specific modifications in motor learning.

Main Methods:

  • Longitudinal in vivo two-photon calcium imaging in mice.
  • Monitoring neuronal activity during a classical conditioning task.
  • Analyzing responses of different M1 cell types to cues and rewards.

Main Results:

  • Most M1 cell types responded differentially to conditioned stimuli (CS) and rewards.
  • Parvalbumin-positive interneurons (PV-INs) showed increased CS reliability.
  • Vasoactive intestinal peptide-positive interneurons (VIP-INs) showed increased reward reliability.
  • Somatostatin-positive interneurons (SOM-INs) developed CS and reward reliability.
  • Pyramidal neurons responded to novel rewards but habituated over time.

Conclusions:

  • Cue and reward signals are segregated among distinct M1 cell types.
  • Cell-type-specific plasticity during learning is vital for motor skill acquisition.
  • These findings offer insights into M1 circuit reorganization during associative learning.