| 释义 |
superior colliculus
Thesaurus| Noun | 1. | superior colliculus - an essential visual center between the retina and the striate cortexnerve center, nerve centre, center, centre - a cluster of nerve cells governing a specific bodily process; "in most people the speech center is in the left hemisphere"mesencephalon, midbrain - the middle portion of the brain |
superior colliculus
su·pe·ri·or col·lic·u·lus [TA] the paired, larger, rounded anterior eminence of the laminae of mesencephalic tectum; major afferent connections of the superficial layers are the retina and striate cortex; input to deep layers of the colliculus are polymodal. Its efferent connections are with the lower brainstem and spinal cord (tectobulbar tract and tectospinal tract) and with the pulvinar and other cell groups in the caudal part of the thalamus; it participates in the extrageniculate visual pathway. The layers of the superior colliculus from superficial to deep are: zonal layer (stratum zonale), superficial gray layer (stratum griseum superficial), optic layer (stratum opticum), intermediate gray layer (stratum griseum intermedium), intermediate white layer (stratum medullare intermedium), deep gray layer (stratum griseum profundum), and deep white layer (stratum medullare profundum). Synonym(s): colliculus superior [TA], anterior quadrigeminal body, corpus quadrigeminum anteriusquadrantanopia Visual field loss in a quarter of the visual field of the eye. The defect is usually bilateral, as it is caused by a lesion past the optic chiasma. It may be homonymous (binasal, bitemporal, upper or lower), crossed (one upper and the other lower), congruous (equal size of the defects), or incongruous (unequal size of the defects) (Fig. Q1). Syn. quadrantanopsia; quadrantic anopsia; quadrantic hemianopia. See hemianopia. " > Fig. Q1 Complete, right, superior homonymous quadrantanopia due to a lesion of the optic radiations in the left temporal lobeAcronymsSeeSCsuperior colliculus
Related to superior colliculus: pons, pulvinar, pineal gland, fovea, cerebral peduncle, basal ganglia, red nucleus, Crus cerebriWords related to superior colliculusnoun an essential visual center between the retina and the striate cortexRelated Words- nerve center
- nerve centre
- center
- centre
- mesencephalon
- midbrain
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