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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

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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.
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In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps that are embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction...
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In contrast to passive transport, active transport involves a substance being moved through membranes in a direction against its concentration or electrochemical gradient. There are two types of active transport: primary active transport and secondary active transport. Primary active transport utilizes chemical energy from ATP to drive protein pumps embedded in the cell membrane. With energy from ATP, the pumps transport ions against their electrochemical gradients—a direction they would...
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Primary motives such as sleep, sex, and pain avoidance are crucial drivers of behavior in humans and animals. These motives ensure survival, reproductive success, and overall well-being by prompting actions that meet essential bodily needs.
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Updated: Jan 28, 2026

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
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Sequential Neural Activity in Primary Motor Cortex during Sleep.

Wei Xu1, Felipe de Carvalho1, Andrew Jackson2

  • 1Institute of Neuroscience, Newcastle University, Newcastle NE2 4HH, United Kingdom.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 8, 2019
PubMed
Summary
This summary is machine-generated.

Sequential neural firing during sleep aids learning consolidation. This study reveals distinct sequential activity patterns in the motor cortex during slow-wave sleep and theta bursts, suggesting a role in procedural memory.

Keywords:
motor cortexnonhuman primatesequential activitysleeptheta bursts

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Area of Science:

  • Neuroscience
  • Sleep Science
  • Motor Control

Background:

  • Sequential neural firing during sleep is hypothesized to consolidate learning.
  • Evidence for sleep-dependent sequence replay is limited, particularly in motor areas and non-rodent models.
  • The role of motor cortex neural sequences during natural sleep remains largely unexplored.

Purpose of the Study:

  • To investigate sequential neural firing in the nonhuman primate motor cortex during natural sleep.
  • To characterize sleep-related neural sequences and their potential link to procedural memory consolidation.
  • To provide direct evidence of sleep replay in the motor cortex.

Main Methods:

  • Long-term neural recordings from the primary motor cortex of two female nonhuman primates using wearable data loggers and chronic electrodes.
  • Characterization of sleep cycles using local field potential (LFP) spectrograms.
  • Analysis of neuronal firing rates, correlations, and sequential firing patterns across different frequency bands during waking and sleep.

Main Results:

  • Slow-wave sleep (SWS) exhibited low firing rates and high synchrony, with neuronal up-state entry sequences mirroring waking low-frequency activity.
  • Brief bursts of theta oscillation during non-SWS states showed distinct, phase-locked sequential firing patterns.
  • These theta sequences were preserved between waking and sleep but differed from low-frequency waking activity.

Conclusions:

  • The motor cortex displays distinct sequential neural activity patterns during different sleep stages.
  • Delta-band sequences during SWS may reflect procedural memory consolidation related to movement.
  • Theta-burst sequences suggest another mechanism for memory replay during sleep, potentially for different memory types.
  • This study provides the first evidence of sequential sleep replay in the motor cortex, highlighting its importance for procedural learning consolidation.