scholarly journals Brain density and size help us catch our Zs

2016 ◽  
Vol 219 (3) ◽  
pp. 299-299
Author(s):  
Erin McCallum
Keyword(s):  
Brain Density

scholarly journals PET imaging shows no changes in TSPO brain density after IFN-α immune challenge in healthy human volunteers

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
M. A. Nettis ◽  
M. Veronese ◽  
N. Nikkheslat ◽  
N. Mariani ◽  
G. Lombardo ◽  
...  
Keyword(s):  
Pet Imaging ◽  
Immune Challenge ◽  
Healthy Human ◽  
Human Volunteers ◽  
Brain Density

Computed Tomographic Brain Density Measurement as a Predictor of Elevated Intracranial Pressure in Blunt Head Trauma

2007 ◽  
Vol 73 (10) ◽  
pp. 1023-1026 ◽  
Author(s):  
Kenji Inaba ◽  
Pedro G.R. Teixeira ◽  
Jean-Stephane David ◽  
Carlos Brown ◽  
Ali Salim ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Intracranial Pressure ◽  
Injury Severity ◽  
Density Measurement ◽  
Elevated Intracranial Pressure ◽  
Icp Monitoring ◽  
Brain Ct ◽  
Blunt Head Trauma ◽  
Brain Density

There are no independent computed tomography (CT) findings predictive of elevated intracranial pressure (ICP). The purpose of this study was to evaluate brain density measurement on CT as a predictor of elevated ICP or decreased cerebral perfusion pressure (CPP). A prospectively collected database of patients with acute traumatic brain injury was used to identify patients who had a brain CT followed within 2 hours by ICP measurement. Blinded reviewers measured mean density in Hounsfield Units (HU) within a 100-mm2 elliptical region at four standardized positions. Brain density measurement was compared for patients with an ICP of 20 or greater versus less than 20 mm Hg and CPP of 70 or greater versus less than 70 mm Hg. During a 2-year period, 47 patients had ICP monitoring after brain CT. Average age was 40 ± 18 years old; 93.6 per cent were male; mean Injury Severity Score was 25 ± 10; and Glasgow Coma Scale was 6 ± 4. There was no difference in brain density measurement for observer 1, ICP less than 20 (26.3 HU) versus ICP 20 or greater (27.4 HU, P = 0.545) or for CPP less than 70 (27.1 HU) versus CPP 70 or greater (26.2, P = 0.624). Similarly, there was no difference for observer 2, ICP less than 20 (26.8 HU) versus ICP 20 or greater (27.4, P = 0.753) and CPP less than 70 (27.6 HU) versus CPP 70 or greater (26.2, P = 0.436). CT-measured brain density does not correlate with elevated ICP or depressed CPP and cannot predict patients with traumatic brain injury who would benefit from invasive ICP monitoring.

Brain density patterns in schizophrenia and mania

1984 ◽  
Vol 6 (3-4) ◽  
pp. 307-315 ◽  
Author(s):  
J COFFMAN ◽  
H NASRALLAH
Keyword(s):  
Brain Density

Effects of long-term neuroleptic use on brain density

1981 ◽  
Vol 5 (1) ◽  
pp. 33-37 ◽  
Author(s):  
Kenneth Lyon ◽  
James Wilson ◽  
Charles J. Golden ◽  
Benjamin Graber ◽  
Jeffrey A. Coffman ◽  
...  
Keyword(s):  
Brain Density

scholarly journals Genetic and environmental influences on focal brain density in bipolar disorder

Brain ◽  
2010 ◽  
Vol 133 (10) ◽  
pp. 3080-3092 ◽  
Author(s):  
Astrid C. van der Schot ◽  
Ronald Vonk ◽  
Rachel M. Brouwer ◽  
G. Caroline M. van Baal ◽  
Rachel G. H. Brans ◽  
...  
Keyword(s):  
Bipolar Disorder ◽  
Environmental Influences ◽  
Brain Density

scholarly journals Morphometric investigation of neurocranium in domestic cat (Felis catus)

2014 ◽  
Vol 11 (1) ◽  
pp. 69-73 ◽  
Author(s):  
M Uddin ◽  
MHR Sarker ◽  
ME Hossain ◽  
MS Islam ◽  
MB Hossain ◽  
...  
Keyword(s):  
Foramen Magnum ◽  
Felis Catus ◽  
Domestic Cat ◽  
Morphometric Characteristics ◽  
Morphometric Investigation ◽  
Significant Difference ◽  
The Mean ◽  
Level Of Significance ◽  
The Brain ◽  
Brain Density

This study was intended to investigate some aspects of the morphometric characteristics of the neurocranium in domestic cat (Felis catus) of Bangladesh. Twenty adult domestic cat including 10 males and 10 female were euthanized using diazepam (@ 20 mg/kg) and their skulls were macerated to give morphometric parameters. Student t-test with level of significance set at 5% (p < 0.05) was used to analyze the obtained values. The mean (mean ± SE) neurocranial volume was 28 ± 0.97 ml, neurocranial length was 6.63 ± 0.77 cm, and the neurocranial height and index were 3.32 ± 0.38 cm and 49.83%, respectively. The mean height and width of the foramen magnum were 1.32 ± 0.09 cm and 1.35 ± 0.08 cm, respectively, while the foramen index was below 100 at 90.72 ± 4.93. Parameters for the foramen magnum index showed significant difference between both sexes at p < 0.05. The foramen magnum showed shape variations and there were multiple hypoglossal foramina in over 80% of the cats. Foramen magnum index was positively correlated with neurocranial volume. The results were discussed in terms of the usage of morphologic and morphometric characteristics of cranium and skulls in several basic and clinical applications in cat such as estimation of the brain density and the use of the cat for cranial pressure experiments. DOI: http://dx.doi.org/10.3329/bjvm.v11i1.17302 Bangl. J. Vet. Med. (2013). 11 (1): 69-73

Wavelet Analysis of Head Acceleration Response Under Dirac Excitation for Early Oedema Detection

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
V. Kostopoulos ◽  
T. H. Loutas ◽  
C. Derdas ◽  
E. Douzinas
Keyword(s):  
Brain Volume ◽  
Energy Content ◽  
Human Head ◽  
Complex Model ◽  
Head Acceleration ◽  
Acceleration Response ◽  
Volume Increase ◽  
Early Oedema ◽  
The Brain ◽  
Brain Density

The present work deals with the application of an innovative in-house developed wavelet-based methodology for the analysis of the acceleration responses of a human head complex model as a simulated diffused oedema progresses. The human head complex has been modeled as a structure consisting of three confocal prolate spheroids, whereas the three defined regions by the system of spheroids, from the outside to the inside, represent the scull, the region of cerebrospinal fluid, and the brain tissue. A Dirac-like pulse has been used to excite the human head complex model and the acceleration response of the system has been calculated and analyzed via the wavelet-based methodology. For the purpose of the present analysis, a wave propagation commercial finite element code, LS-DYNA 3D, has been used. The progressive diffused oedema was modeled via consecutive increases in brain volume accompanied by a decrease in brain density. It was shown that even a small increase in brain volume (at the level of 0.5%) can be identified by the effect it has on the vibration characteristics of the human head complex. More precisely, it was found that for some of the wavelet decomposition levels, the energy content changes monotonically as the brain volume increases, thus providing a useful index of monitoring an oncoming brain oedema before any brain damage appears due to uncontrolled intracranial hypertension. For the purpose of the present work and for the levels of brain volume increase considered in the present analysis, no pressure increase was assumed into the cranial vault and, associatively, no brain compliance variation.

Intracerebral Space-Occupying Lesions With Brain Density (Isodense Lesions)

1978 ◽  
pp. 75-79 ◽  
Author(s):  
Th. Grumme ◽  
K. Kretzschmar ◽  
G. Ebhardt ◽  
W. Lanksch ◽  
S. Lange
Keyword(s):  
Brain Density
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