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Mice adapt whisking behavior using layer 5 pyramidal neurons in the vibrissae cortex. Active dendritic integration in these neurons creates a mixed neural representation crucial for transforming sensory input into motor commands during adaptive sensing.

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Area of Science:

  • Neuroscience
  • Sensory processing
  • Motor control

Background:

  • Animals actively scan environments for accurate perception.
  • Neuronal representations underlying active sensing are not fully understood.

Purpose of the Study:

  • Investigate neuronal representations mediating adaptive sensing behaviors.
  • Determine the role of layer 5 pyramidal neurons in the vibrissae cortex during active sensing.

Main Methods:

  • Calcium (Ca2+) imaging in awake mice performing an active sensing task.
  • Selective optogenetic manipulation of neuronal activity.
  • Analysis of single-neuron and population-level neural encoding.

Main Results:

  • Layer 5 pyramidal neurons in the vibrissae cortex exhibit diverse and distributed representations.
  • Optogenetic perturbation impaired single-neuron selectivity and network encoding.
  • Impairment resulted from inhibited active dendritic integration.

Conclusions:

  • Active dendritic integration in pyramidal neurons generates a nonlinearly mixed network representation.
  • This representation integrates sensorimotor parameters for adaptive behavior.
  • The layer 5 cortical circuit motif may support general circuit computations for sensorimotor transformations.