scholarly journals Chronic and progressive deficits after a single closed head injury in mice

2021 ◽  
Author(s):  
Siobhan Lawless ◽  
David Havlicek ◽  
Craig Kelley ◽  
Elena Nikulina ◽  
Peter Bergold
Keyword(s):  
Head Injury ◽  
Behavioral Outcomes ◽  
Closed Head Injury ◽  
Acute Injury ◽  
Cortical Atrophy ◽  
Motor Deficits ◽  
Markerless Tracking ◽  
Closed Head ◽  
Progressive Disorder ◽  
Progressive Motor Deficits

Background: Acute injury following brain trauma may evolve into a chronic and progressive disorder. Assessment of chronic consequences of TBI must distinguish between effects of age and injury. Methods: C57BL/6 mice receive single closed head injury (CHI) and are analyzed at 14DPI or 180DPI for cortical atrophy and 7DPI or 180DPI for behavioral outcomes. Results: CHI induces ipsilesional atrophy at 14DPI that increases 180 DPI due to an effect of age. On open field, injured mice develop a turn bias at 180DPI not present at 7DPI. On rotarod, injured mice have shorter latencies at 7DPI, but not at 180DPI due to worsening performance of aging uninjured mice. On beam walk, both groups at 180DPI more slowly traverse a 2cm and 1cm beam than at 7DPI. Foot-faults show no significant effects of age or injury. Limb position was assessed using DeeplabcutTM markerless tracking followed by computation of absition (integral of limb displacement over time) using custom Python scripts. On the 2cm beam, age increased absition in all limbs of uninjured mice and both forelimbs of injured mice. Injury increased left hindlimb absition at 7DPI. On the 1cm beam both forelimbs and the left hindlimb of injured mice at 180DPI have larger absition than uninjured mice at 180DPI or injured mice at 7DPI. These data suggest chronic and progressive motor deficits of injured mice at 180DPI. Conclusions: A single impact produces ipsilesional cortical atrophy and chronic and progressive motor deficits. Quantitative behavioral analysis reveals deficits not seen using standard outcomes.

Long-term neuropsychological outcome of closed head injury

1979 ◽  
Vol 50 (4) ◽  
pp. 412-422 ◽  
Author(s):  
Harvey S. Levin ◽  
Robert G. Grossman ◽  
James E. Rose ◽  
Graham Teasdale
Keyword(s):  
Head Injury ◽  
Social Adjustment ◽  
Prognostic Significance ◽  
Closed Head Injury ◽  
Memory Storage ◽  
Acute Injury ◽  
Closed Head ◽  
Disabled Patients

✓ Long-term recovery from severe closed head injury was investigated in predominantly young adults whose Glasgow Coma score was 8 or less at the time of admission. Of the 27 patients studied (median follow-up interval of 1 year), 10 attained a good recovery, 12 were moderately disabled, and five were severely disabled. In contrast to previous studies suggesting that intellectual ability after severe closed head injury eventually recovers to a normal level, our findings showed that residual intellectual level, memory storage and retrieval, linguistic deficit, and personal social adjustment corresponded to overall outcome. All severely disabled patients and several moderately disabled patients exhibited unequivocal cognitive and emotional sequelae after long follow-up intervals. Analysis of persistent neuropsychological deficit in relation to neurological indices of acute injury severity demonstrated the prognostic significance of oculovestibular deficit.

Behavioral Outcomes After Pediatric Closed Head Injury: Relationships With Age, Severity, and Lesion Size

1996 ◽  
Vol 11 (4) ◽  
pp. 283-290 ◽  
Author(s):  
Jack M. Fletcher ◽  
Harvey S. Levin ◽  
David Lachar ◽  
Lori Kusnerik ◽  
Harriet Harward ◽  
...  
Keyword(s):  
Head Injury ◽  
Behavioral Outcomes ◽  
Closed Head Injury ◽  
Lesion Size ◽  
Closed Head

scholarly journals Motor deficits and recovery during the first year following mild closed head injury

Brain Injury ◽  
2006 ◽  
Vol 20 (8) ◽  
pp. 807-824 ◽  
Author(s):  
Marcus H. Heitger ◽  
Richard D. Jones ◽  
John C. Dalrymple-Alford ◽  
Chris M. Frampton ◽  
Michael W. Ardagh ◽  
...  
Keyword(s):  
Head Injury ◽  
Closed Head Injury ◽  
Motor Deficits ◽  
First Year ◽  
Closed Head

The Management of Minor Closed Head Injury in Children

PEDIATRICS ◽  
2000 ◽  
Vol 106 (6) ◽  
pp. 1524-1525 ◽  
Author(s):  
C. M. A. LeBlanc; ◽  
J. B. Coombs ◽  
R. Davis
Keyword(s):  
Head Injury ◽  
Closed Head Injury ◽  
Closed Head

Management of Minor Closed Head Injury in Children

PEDIATRICS ◽  
2001 ◽  
Vol 107 (5) ◽  
pp. 1231-1231 ◽  
Author(s):  
A. J. Smally; ◽  
J. B. Coombs ◽  
R. Davis
Keyword(s):  
Head Injury ◽  
Closed Head Injury ◽  
Closed Head

scholarly journals Differential Leukocyte and Platelet Profiles in Distinct Models of Traumatic Brain Injury

Cells ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 500
Author(s):  
William Brad Hubbard ◽  
Meenakshi Banerjee ◽  
Hemendra Vekaria ◽  
Kanakanagavalli Shravani Prakhya ◽  
Smita Joshi ◽  
...  
Keyword(s):  
Traumatic Brain Injury ◽  
Brain Injury ◽  
Head Injury ◽  
Closed Head Injury ◽  
Diffuse Brain Injury ◽  
Blood Brain ◽  
Closed Head ◽  
Leukocyte Counts ◽  
Neutrophil Aggregation ◽  
Blood Leukocyte

Traumatic brain injury (TBI) affects over 3 million individuals every year in the U.S. There is growing appreciation that TBI can produce systemic modifications, which are in part propagated through blood–brain barrier (BBB) dysfunction and blood–brain cell interactions. As such, platelets and leukocytes contribute to mechanisms of thromboinflammation after TBI. While these mechanisms have been investigated in experimental models of contusion brain injury, less is known regarding acute alterations following mild closed head injury. To investigate the role of platelet dynamics and bioenergetics after TBI, we employed two distinct, well-established models of TBI in mice: the controlled cortical impact (CCI) model of contusion brain injury and the closed head injury (CHI) model of mild diffuse brain injury. Hematology parameters, platelet-neutrophil aggregation, and platelet respirometry were assessed acutely after injury. CCI resulted in an early drop in blood leukocyte counts, while CHI increased blood leukocyte counts early after injury. Platelet-neutrophil aggregation was altered acutely after CCI compared to sham. Furthermore, platelet bioenergetic coupling efficiency was transiently reduced at 6 h and increased at 24 h post-CCI. After CHI, oxidative phosphorylation in intact platelets was reduced at 6 h and increased at 24 h compared to sham. Taken together, these data demonstrate that brain trauma initiates alterations in platelet-leukocyte dynamics and platelet metabolism, which may be time- and injury-dependent, providing evidence that platelets carry a peripheral signature of brain injury. The unique trend of platelet bioenergetics after two distinct types of TBI suggests the potential for utilization in prognosis.

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