motor cortex

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motor cortex

The scientist points to the motor cortex on a labeled brain diagram.

Definition
  1. Noun:
    • The region of the cerebral cortex responsible for generating neural impulses that control voluntary muscle movements: The motor cortex is a critical area of the brain's frontal lobe that plans, executes, and coordinates voluntary physical actions.
Usage Examples
  • Noun:
    • Damage to the primary motor cortex can result in paralysis or weakness on the opposite side of the body.
    • Neuroscientists mapped the motor cortex by observing which body parts moved when different areas were electrically stimulated.
    • The signal to lift your arm originates in your motor cortex.
Advanced Usage

  • "Primary motor cortex" (M1): The main region of the motor cortex, directly involved in executing movements.

    • The primary motor cortex contains a topographic map of the body known as the motor homunculus.

  • "Premotor cortex": An area anterior to the primary motor cortex involved in planning and coordinating complex movements.

    • The premotor cortex is active when you mentally rehearse a physical action before performing it.

  • "To be localized in the motor cortex": Describes a function or activity that occurs specifically in this brain region.

    • The control of fine finger movements is highly localized in a specific part of the motor cortex.
Variants and Related Words
  • Motor area: Another term for the motor cortex.
  • Motor strip: An informal term for the primary motor cortex due to its elongated shape.
  • Corticospinal tract: The major pathway through which signals from the motor cortex travel to the spinal cord to initiate movement.
Synonyms
  • Rolando's area: An older anatomical term.
  • Motor region: A general synonym.
Related Phrases and Concepts
  • Motor homunculus: The distorted map of the body within the primary motor cortex, where larger areas correspond to body parts requiring finer motor control (e.g., hands, face).
  • Motor command: The neural signal generated by the motor cortex.
  • Upper motor neuron: Neurons that originate in the motor cortex and carry signals down to the brainstem and spinal cord.
motor cortex

The scientist points to the motor cortex on a labeled brain diagram.

Noun
  1. the cortical area that influences motor movements

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