Search results
Results from the WOW.Com Content Network
In neuroanatomy, the cingulum or cingulum bundle is an association tract, a nerve tract that projects from the cingulate gyrus to the entorhinal cortex in the brain, allowing for communication between components of the limbic system. [1]
The cingulate cortex includes the entire cingulate gyrus, which lies immediately above the corpus callosum, and the continuation of this in the cingulate sulcus. The cingulate cortex is usually considered part of the limbic lobe .
The adjacent subcallosal cingulate gyrus has been implicated in major depression and research indicates that deep-brain stimulation of the region could act to alleviate depressive symptoms. [38] Although people with depression had smaller subgenual ACCs, [ 39 ] their ACCs were more active when adjusted for size.
The posterior cingulate cortex (PCC) is the caudal part of the cingulate cortex, located posterior to the anterior cingulate cortex. This is the upper part of the "limbic lobe". The cingulate cortex is made up of an area around the midline of the brain. Surrounding areas include the retrosplenial cortex and the precuneus.
Association fibers are axons (nerve fibers) that connect cortical areas within the same cerebral hemisphere. [1]In human neuroanatomy, axons within the brain, can be categorized on the basis of their course and connections as association fibers, projection fibers, and commissural fibers. [1]
The cingulum shown in red in the cingulate gyrus. The tracts that connect cortical areas within the same hemisphere are called association tracts. [5] Long association fibers connect different lobes of a hemisphere to each other whereas short association fibers connect different gyri within a single lobe.
The anterior nuclei receive afferents from the hippocampus and subiculum directly via the fornix, and indirectly via the mammillary bodies and mammillothalamic tract (MTT). ). They send efferent fibers to the cingulate gyrus, limbic, and orbitofrontal c
The circuit connects the hypothalamus and the cortex and acts as the emotional system of the brain. "The cingulate cortex projects to the hippocampus, and the hippocampus projects to the hypothalamus by way of the bundle of axons called the fornix. Hypothalamic effects reach the cortex via a relay in the anterior thalamic nuclei." [7]