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a long, deep sagittal fissure on the undersurface of the temporal lobe, marking the border between the fusiform gyrus laterally and the hippocampal and lingual gyri medially; the great depth of the collateral sulcus results in a bulging of the floor of the occipital and temporal horn of the lateral ventricle, the collateral eminence.
Synonym(s): occipitotemporal sulcus [TA], sulcus collateralis [TA], sulcus occipitotemporalis [TA], collateral fissure, fissura collateralis
Farlex Partner Medical Dictionary © Farlex 2012
A groove running longitudinally on the inferior (under) surface of the temporal lobe of the brain. It is parallel to the collateral sulcus, from which it is separated by the medial occipitotemporal gyrus.
See also: sulcus
Medical Dictionary, © 2009 Farlex and Partners