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Related Concept Videos

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...
Association Areas of the Cortex01:21

Association Areas of the Cortex

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,...
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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.
Somatosensation01:33

Somatosensation

The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
Higher Mental Functions of Brain: Learning and Memory01:26

Higher Mental Functions of Brain: Learning and Memory

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 playing an...
Action Potential01:14

Action Potential

Neurons communicate by firing action potentials—the electrochemical signal that is propagated along the axon. The signal results in the release of neurotransmitters at axon terminals, thereby transmitting information to the nervous system. An action potential is a specific "all-or-none" change in membrane potential that results in a rapid spike in voltage.
Membrane potential in neurons
Neurons typically have a resting membrane potential of about -70 millivolts (mV). When they receive...

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In Vivo Optical Calcium Imaging of Learning-Induced Synaptic Plasticity in Drosophila melanogaster
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Distinct sensorimotor encoding in tuft dendrites and somata associated with action, correction, and learning.

Jackson Scheib, Zachary L Newman, Jacob Gable

    Biorxiv : the Preprint Server for Biology
    |May 18, 2026
    PubMed
    Summary

    Frontal cortex neurons show distinct activity in dendrites versus cell bodies during motor learning. This research reveals how apical tuft dendrites encode sensory cues and corrective actions, aiding motor skill acquisition.

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    Area of Science:

    • Neuroscience
    • Motor Control
    • Dendritic Computation

    Background:

    • Frontal cortex is crucial for action control and motor learning.
    • Layer 5 (L5) neurons' apical tuft dendrites in the frontal cortex may support flexible computation and learning through regenerative events.

    Purpose of the Study:

    • To investigate sensorimotor encoding differences between apical tuft dendrites and somata of L5 extratelencephalic (ET) neurons during motor skill learning.
    • To understand how these neuronal compartments contribute to action control and learning plasticity.

    Main Methods:

    • Longitudinal two-photon calcium imaging in frontal cortex L5 ET neurons during a cued dexterous action learning task.
    • Dissociating error signals from corrective action signals by analyzing movement errors during learning.

    Main Results:

    • Somatic activity encoded both sensory cues and action, while tuft activity primarily encoded sensory cues.
    • Distinct tuft activity selectively associated with corrective actions was observed during learning.
    • Learning induced divergent plasticity in response gain and selectivity between tuft dendrites and somata.

    Conclusions:

    • Apical tuft dendrites and somata of frontal cortical L5 neurons exhibit distinct sensorimotor encoding, sensitivity to corrective actions, and functional plasticity.
    • These findings provide a basis for exploring dendritic computation's role in motor skill learning.