Evidence map›Paper›PMID 21940616›Full record

ArticleNeurology2011

Arterial spin labeling and altered cerebral blood flow patterns in the minimally conscious state.

A A Liu, H U Voss, J P Dyke, L A Heier, N D Schiff

Open access · bronzeAbstract read
In one paragraph

Article in Neurology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
1.7field-weighted citation impact, top 15% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 37 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
  4. Review
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Review
  11. Review
  12. Article
  13. Article
  14. Article
  15. Mapping the Connectome Following Traumatic Brain Injury.Current neurology and neuroscience reports · 2016
    Review
  16. Article
  17. Article
  18. Review
  19. Review
  20. Functional MRI and outcome in traumatic coma.Current neurology and neuroscience reports · 2013
    Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

A A LiuBeth Israel Deaconess-Harvard University, 330 Brookline Avenue, Boston, MA 02215, USA. aaliu@bidmc.harvard.edu
H U Voss
J P Dyke
L A Heier
N D Schiff
Presbyterian Hospital · US

Funding

Mechanisms of recovery following severe brain injuryR01HD051912 · NICHD · WEILL MEDICAL COLL OF CORNELL UNIV · PI SCHIFF, NICHOLAS D · 2008 to 2012
$2.1M
NICHD NIH HHS HD51912NICHD NIH HHS R01 HD051912
6 · The paper itself

Abstract

objectiveTo use arterial spin labeling (ASL) to compare cerebral blood flow (CBF) patterns in minimally conscious state (MCS) patients with those in normal controls in an observational study design.

methodsSubjects meeting MCS criteria and normal controls were identified. A pseudocontinuous ASL sequence was performed with subjects and controls in the resting awake state. Multiple CBF values for 10 predetermined regions of interest were sampled and average CBF was calculated and compared between controls and subjects.

resultsTen normal controls were identified, with ages ranging from 26 to 54 years. Four subjects met the MCS criteria and received an ASL study, with one patient receiving a second study at a later date. Subjects ranged in age from 19 to 58 years and had traumatic brain injury, stroke, or hypoxic-ischemic encephalopathy. Regional CBF for controls ranged from 21.6 to 57.2 mL/100 g/min, with a pattern of relatively increased blood flow posteriorly including the posterior cingulate, parietal, and occipital cortices. CBF patterns for MCS subjects showed greater variability (from 7.7 to 33.1 mL/100 g/min), demonstrating globally decreased CBF in gray matter compared with that in normal controls, especially in the medial prefrontal and midfrontal regions. In the one subject studied longitudinally, global CBF values increased over time, which correlated with clinical improvement.

conclusionsWe identified globally decreased CBF and a selective reduction of CBF within the medial prefrontal and midfrontal cortical regions as well as gray matter in MCS patients. ASL may serve as an adjunctive method to assess functional reserve in patients recovering from severe brain injuries.

Indexed as

Spin LabelsAdultArteriesBrain MappingCerebral CortexCerebrovascular CirculationFemaleHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMaleMiddle AgedObservationOxygenPersistent Vegetative StateYoung AdultOxygenSpin Labels

Identifiers

PMID21940616
PMCPMC3198975
OpenAlexW2167444549

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.