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Valko, PO; Gavrilov, YV; Yamamoto, M; Noaín, D; Reddy, H; Haybaeck, J; Weis, S; Baumann, CR; Scammell, TE.
Damage to Arousal-Promoting Brainstem Neurons with Traumatic Brain Injury.
Sleep. 2016; 39(6):1249-1252 [OPEN ACCESS]
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Authors Med Uni Graz:
Haybäck Johannes
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Abstract:
Coma and chronic sleepiness are common after traumatic brain injury (TBI). Here, we explored whether injury to arousal-promoting brainstem neurons occurs in patients with fatal TBI. Postmortem examination of 8 TBI patients and 10 controls. Compared to controls, TBI patients had 17% fewer serotonergic neurons in the dorsal raphe nucleus (effect size: 1.25), but the number of serotonergic neurons did not differ in the median raphe nucleus. TBI patients also had 29% fewer noradrenergic neurons in the locus coeruleus (effect size: 0.96). The number of cholinergic neurons in the pedunculopontine and laterodorsal tegmental nuclei (PPT/LDT) was similar in TBI patients and controls. TBI injures arousal-promoting neurons of the mesopontine tegmentum, but this injury is less severe than previously observed in hypothalamic arousal-promoting neurons. Most likely, posttraumatic arousal disturbances are not primarily caused by damage to these brainstem neurons, but arise from an aggregate of injuries, including damage to hypothalamic arousal nuclei and disruption of other arousal-related circuitries. © 2016 Associated Professional Sleep Societies, LLC.
Find related publications in this database (using NLM MeSH Indexing)
Adrenergic Neurons - pathology
Arousal -
Autopsy -
Brain Injuries, Traumatic - pathology
Brain Stem - pathology
Case-Control Studies -
Cholinergic Neurons - cytology
Dorsal Raphe Nucleus - pathology
Humans -
Hypothalamus - pathology
Locus Coeruleus - pathology
Neural Pathways -
Neurons - cytology
Neurons - pathology
Pons - cytology
Serotonergic Neurons - cytology
Serotonergic Neurons - pathology

Find related publications in this database (Keywords)
traumatic brain injury
arousal
coma
locus coeruleus
raphe nucleus
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