hippocampal formation


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Related to hippocampal formation: Hippocampus, limbic system, Entorhinal cortex

hippocampal formation

An imprecisely defined structure in the medial temporal lobe of the brain, which is thought to play a central role in memory, spatial coding and in control of attention. In its narrowest definition, it includes the dentate gyrus, the hippocampus proper and the subiculum; some authors also include the presubiculum, parasubiculum and entorhinal cortex.

hippocampal formation

Olfactory structures lying along the medial margin of the pallium. They include the hippocampus, dentate gyrus, supracallosal gyrus, longitudinal striae, subcallosal gyrus, diagonal band of Broca, and hippocampal commissure.
See also: hippocampal
References in periodicals archive ?
Alterations in Hippocampal Formation of Children Suffering from Post-traumatic Stress Disorder
Loss of asymmetry of hippocampal formation was observed in posttraumatic stress disorder patients (27).
Reduced spinophilin but not microtubule-associated protein 2 expression in the hippocampal formation in schizophrenia and mood disorders: molecular evidence for a pathology of dendritic spines.
Homing in pigeons: the role of the hippocampal formation in the representation of landmarks used for navigation.
340), that stress and trauma trigger the release of hormones that can damage the hippocampal formation.
Perrone-Bizzozero, "Altered myelination of the hippocampal formation in subjects with schizophrenia and bipolar disorder," Neurochemical Research, vol.
Besides affecting the hypothalamus and other brain areas related to reproduction, ovarian steroids have widespread effects throughout the brain, on serotonin pathways, catecholaminergic neurons, and the basal forebrain cholinergic system as well as the hippocampal formation, a brain region involved in spatial and declarative memory.
Freund, "Distribution, morphological features, and synaptic connections of parvalbumin- and calbindin [D.sub.28k]-immunoreactive neurons in the human hippocampal formation," Journal of Comparative Neurology, vol.
Detailed three-dimensional (3D) morphological studies of microglia in the hippocampal formation of birds are not available, and only a single stereological analysis (glia and neurons) has been published (8).
Moreover, this technique reveals the anatomical features of the hippocampal formation at an unprecedented level of detail, providing the basis for hippocampal subfield measurement.
The sections were examined under a light microscope for two purposes, to determine the location of the injection needle tips and to assess for the integrity of the hippocampal formation. The integrity of the hippocampal pyramidal and granular fields was assessed using light microscopy.
Research with animals has shown that a long term exposure to glucocorticoids destroys the neurons located in the hippocampal formation by decreasing the entry of glucose and decreasing the reuptake of glutamate.