| 词汇 | mesencephalic |
| 释义 | mesencephalic adjective anatomy specializeduk /ˌmes.en.kəˈfæl.ɪk//ˌmes.en.səˈfæl.ɪk/ us /ˌmez.en.səˈfæl.ɪk//ˌmes.en.səˈfæl.ɪk/ relating to the mesencephalon(= the middle of the three main parts of the brain): They found that stress selectively activates some mesencephalic neurons. We report a patient with multi-cystic mesencephalic lesions. It is not altogether clear whether the mesencephalic root is motor or sensory. In amphibians, the mesencephalic tectum is involved in the integration of both visual and multisensory information. The mesencephalic reticular formation is involved in the generation of eye and body movements in fish. The brain & nervous system abducens nerve abducent nerve accessory nerve alexithymia allism glossopharyngeal nerve grey matter hemispheric hemispherical hindbrain neurogenic neurogenically neuroglia neuroglial neurohormonal reticular formation rhinencephalon rhombencephalon right brain right-brained Examples of mesencephalicmesencephalic These authors subdivide the thalamic nuclei into three tiers: the intermediate and ventral tiers receive projections from the mesencephalic colliculi, and the dorsal tier receives projections from lemniscal systems. In both mammals and reptiles, the somatosensory system contains a lemniscal component (spinothalamic and dorsal column pathways), that does not synapse in the mesencephalic colliculi before reaching the thalamus. In addition to the thalamofugal visual pathway described above, there is a tectofugal visual pathway, which originates in the retina and projects to the mesencephalic optic tectum or superior colliculus. Ventral mesencephalic neurons containing both cholecystokininand tyrosine hydroxylase-like immunoreactivities project to forebrain regions. Fig. 7 illustrates the topographic relation, in the anteroposterior axis, of the projections from the mesencephalic reticular formation, torus semicircularis, and torus longitudinalis to the different tectal injected zones. One of these consists of the pathways connecting the basal ganglia with the mesencephalic optic tectum. Above the monoaminergic nuclei in the brain stem (mesencephalic or midbrain region) is the diencephalon. Impairment of the ubiquitin-proteasome system causes dopaminergic cell death and inclusion body formation in ventral mesencephalic cultures. Investigations into the use of xenotransplants using mesencephalic tissue are ongoing. Horizontal saccades induced by stimulation of the central mesencephalic reticular formation. Collothalamic nuclei receive sensory projections from the mesencephalic colliculi (like the visual tectofugal and the auditory pathways). These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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