The claustrum is lateral to the putamen and medial to the insular cortex and is considered by some sources to be part of the basal ganglia.
22.
Clinical evidence has suggested that the claustrum plays an important role in maintaining consciousness, potentially being usable as an " on-off switch ".
23.
One of the interesting features of the claustrum is the uniformity in the types of cells, indicating a uniform type of processing by all claustral neurons.
24.
In 2014 the case of one woman was reported who fell unconscious when her claustrum was electrically stimulated and regained consciousness as soon as the stimulation stopped.
25.
The third theory, which is supported by the majority at present, says that the claustrum is neither distinctly part of the cortex nor from the basal ganglia complex.
26.
There was one documented case on an enlarged claustrum in a patient with epilepsy, as well as another case in which the insula was malformed but the claustrum remained.
27.
There was one documented case on an enlarged claustrum in a patient with epilepsy, as well as another case in which the insula was malformed but the claustrum remained.
28.
Also, due to the location and complex integration of the claustrum with other parts of the brain, it is difficult to do lesion studies without affecting other regions.
29.
Given that claustrum activation is thought to reflect the integration of perceptual and memory elements into a conscious gestalt, they suggest that activation correlates with the experience of fluency.
30.
As far as historical cases shedding light on the anatomy and function of the claustrum is concerned, there have not been many to date that survived the struggle of time.
