trigonum cerebrale, fornix - an arched bundle of white fibers at the base of the brain by which the hippocampus of each hemisphere projects to the contralateral hippocampus and to the thalamus and mamillary bodies

neural structure - a structure that is part of the nervous system

amygdala, amygdaloid nucleus, corpus amygdaloideum - an almond-shaped neural structure in the anterior part of the temporal lobe of the cerebrum; intimately connected with the hypothalamus and the hippocampus and the cingulate gyrus; as part of the limbic system it plays an important role in motivation and emotional behavior

hippocampus - a complex neural structure (shaped like a sea horse) consisting of gray matter and located on the floor of each lateral ventricle; intimately involved in motivation and emotion as part of the limbic system; has a central role in the formation of memories

cingulate gyrus, gyrus cinguli - a long curved structure on the medial surface of the cerebral hemispheres; the cortical part of the limbic system