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cortex Definition

cor·tex (kôrteks′)

noun pl. -·ti·ces′-tə sēz′

    1. the outer part or external layers of an internal organ, as of the kidney or the adrenal glands
    2. the outer layer of gray matter over most of the brain
  1. Bot.
    1. a layer of tissue in the roots and stems of dicotyledonous plants, located between the stele and epidermis
    2. loosely any layer of stem tissue external to the xylem
    3. an outer layer of tissue in certain algae, lichens, and fungi
  2. Pharmacy the bark or rind of a plant

Etymology: L, bark of a tree: see corium

cortex Usage Examples

Converse of object

  • activate: In these conditions it seems appropriate to activate intact visual cortex of blind or partial sight patients to rehabilitate vision.
  • stimulate: This fragment of the complete ACTH molecule does not stimulate the adrenal cortex to produce hormones.

Adjective modifier

  • prefrontal: In addition, lowered activity in the prefrontal cortex relative to controls has been reported for those with autism.
  • cerebral: An analysis of cell lineage in the rat cerebral cortex.
  • frontal: More recently, I have begun to explore a possible general role for the frontal cortex in processing emotion more broadly.
  • adrenal: The outer part of the adrenal gland is the adrenal cortex which makes three main hormones called steroids.
  • perirhinal: Cells in the perirhinal cortex, which provide a major input to LEC, also revealed little spatial tuning.
  • parietal: The results do not indicate a specific role of parietal cortex in attentional shifting.

Modifies a noun

activation: Likewise, lots of fMRI studies in humans also show premotor cortex activations caused in the absence of motor requirements.

Noun used with modifier

  • premotor: Likewise, lots of fMRI studies in humans also show premotor cortex activations caused in the absence of motor requirements.
  • pre-frontal: This is because they regularly exercise the part of the brain known as the pre-frontal cortex which reinforces attention span.
  • motor: Powerful magnets aimed at the motor cortex have been shown to induce muscles to twitch.
  • barrel: Recent research work here has been undertaken on the auditory cortex and the rodent barrel cortex.
  • rat: The scientists managed to stimulate single brain cells in the rat cortex.
  • root: Look for signs of mycorrhizal infection - the root cortex will contain bright blue or purple staining hyphal threads.

Possessives

brain: In the past, researchers trying to understand dyslexia have focused on the highly developed language centers of the brain's cerebral cortex.

Preposition: in

brain: Each receptor is connected through the optic nerve to the visual cortex in the brain.

Preposition: of

  • monkey: The final experiments measure attentional modulation of single neuron activity in the visual cortex of the monkey.
  • brain: A core pathology of the disease is reduced activity in the prefrontal cortex of the brain.
  • rat: In addition, Robbins has found alterations in the hippocampus, amygdala and prefrontal cortex of these rats.

Browse dictionary entries near cortex

  1. Cortes
  2. cortege
  3. Cortés
  4. Cortázar
  5. Corsica
  6. corsetry
  7. corsetiere
  8. corset
  9. corselet
  10. corse
  1. cortical
  2. corticate
  3. cortico-
  4. corticoid
  5. corticosteroid
  6. corticosterone
  7. corticotropin
  8. cortin
  9. cortina
  10. cortisol