Definition of subcortical in US English:



  • 1Below the cortex.

    • ‘All the neural equipment you need to do ocular following and emotional responses is subcortical.’
    • ‘Hallucinations occur in up to 20 percent of patients with Parkinson's disease; delusions, paranoia, and subcortical dementia also may occur.’
    • ‘Inattention, latency in recall, and lack of spontaneity frequently are encountered indicators of subcortical dementia, the intellectual impairment observed in NPH.’
    • ‘Radiographic studies showed a collapse of the eighth vertebra and a subcortical defect on the inner surface of the distal end of the patient's left femur.’
    • ‘It is the somatosensory system that provides the most compelling evidence for plasticity, with cortical and subcortical reorganisation, with limits to the latter.’
    • ‘Lewis and his co-authors tend to unnecessarily bifurcate explicit rational insight (so-called cortical knowledge) and experiential learning (so-called subcortical knowledge).’
    • ‘Axial transport of melanosomes in the dendritic arms of melanocytes is now recognized as another bidirectional dual transport system, containing microtubules near the central axis and subcortical actin filaments.’
    • ‘All of these results support a peripheral polyneuropathy with a possible cortical or subcortical involvement.’
    • ‘The liver was exposed by midline and subcortical incisions.’
    • ‘The lesions characteristically involve subcortical white matter, extending to the lower layers of the cortical ribbon.’
    • ‘These structures can be found in both cortical and subcortical areas, although structures in the medial temporal lobes show the most dramatic accumulation of these abnormalities.’
    • ‘Imaging studies done 9 days after admission showed significant progression of his disease, with increased meningeal thickening and focal extension to the adjacent cortex and subcortical white mater.’
    • ‘Layers V and VI have particularly large pyramidal cells that project to subcortical centres, such as the spinal cord and thalamus.’
    • ‘Fear responses do not require brain structures needed for consciousness and analytic thought but can be processed without conscious awareness by subcortical structures.’
    • ‘The ratio of cortical arousal to subcortical activation was significantly smaller in the infants who died of SIDS than in the control infants during REM sleep.’
    • ‘Computed tomograms on days 0 and 8 after left subcortical haemorrhage presenting as a transient ischaemic attack with symptoms lasting 50 minutes.’
    • ‘The locus coeruleus is one of a number of subcortical loci involved in modulating cortical activity and awareness.’
    • ‘Baseline sleep states that preceded arousal or subcortical activation were established during 30-sccond time periods.’
    • ‘Left frontal lesions, left lesions of the basal ganglia, and cortical and subcortical atrophy also are common.’
    • ‘It is unclear why the death of the infants could not be prevented by the increased frequency in subcortical activation as measured in the victims of Sudden Infant Death Syndrome.’
    1. 1.1Anatomy Relating to or denoting the region of the brain below the cortex.
      • ‘Neuroimaging studies demonstrate that pain involves highly distributed processing in multiple cortical and subcortical regions.’
      • ‘At one month of age there is intensive activity in the cortical and subcortical regions that control sensory-motor functions.’
      • ‘Retrieval success produced a significant cluster of activation in the prefrontal cortex, the medial frontal gyrus, and several clusters in subcortical regions, most notably in the left medial temporal lobe.’
      • ‘These subcortical regions may then serve to signal other critical nodes, such as the hypothalamus, that modulate the body's hormonal internal milieu and cortical regions initiating motor action.’
      • ‘Normal consciousness requires wakefulness or arousal activated in the brain stem and midbrain and awareness via the cerebral cortex and projections to and from subcortical brain areas.’