| Authors | Hayley, A. Green, M. Downey, L. Keane, M. Kostakis, P. Shehabi, Y |
|---|---|
| Type | Journal Article (Original Research) |
| Journal | Psychopharmacology |
| PubMed ID | 29476241 |
| Year of Publication | 2018 |
| URL | https://www.ncbi.nlm.nih.gov/pubmed/29476241 |
| DOI | /10.1007/s00213-018-4842-7 |
| Download |  Hayley2018_Article_NeurocognitiveAndBehaviouralPe.pdf (654.6 KB) |
| Abstract | BACKGROUND: The acute and delayed effect of analgesic-range doses of ketamine on neurocognitive and behavioural outcomes is understudied. Using a non-controlled open-labelled design, three (1-h duration) increasing intravenous (IV) ketamine infusions comprising (i) 30 mg bolus of ketamine + 8 mg/h IV infusion, (ii) 12 mg/h IV infusion and (iii) 20 mg/h infusion were administered to 20 participants (15 male, 5 female, mean age = 30.8 years). Whole-blood ketamine and norketamine concentrations were determined at each treatment step and post-infusion. METHODS: The Cambridge Neuropsychological Test Automated Battery (CANTAB) was used to assess reaction/movement time (RTI, Simple and 5-Choice), visuospatial working memory (SWM), spatial planning (SOC) and subjective effects (visual analogue scale; VAS) during treatment and at post-treatment. RESULTS: Significant main effects were reported for time (dose) on CANTAB RTI 5-Choice reaction (F(4,18) = 3.41, p = 0.029) and movement time (F(4,18) = 4.42, p = 0.011), SWM (F(4,18) = 4.19, p = 0.014) and SOC (F(4,18) = 4.13, p = 0.015), but not RTI Simple reaction or movement time. Post hoc analyses revealed dose-dependent effects for both RTI 5-Choice reaction and movement time (all p < 0.05). Post-treatment performance on all neurocognitive and behavioural tasks returned to baseline levels. Regression analyses revealed a weak positive linear association between SWM 'strategy' score (R(2) = 0.103, p < 0.001), all performance-based CANTAB VAS items (R(2) range 0.005-0.137, all p < 0.05) and ketamine blood concentrations. DISCUSSION: The open-label, non-controlled trial design somewhat precludes the ability to adequately account for random treatment effects. Notwithstanding, these results suggest that analgesic doses of ketamine produce acute, selective, dose-dependent deficits in higher-order neurocognitive and behavioural domains. |
http://www.ibas.org.au/what-we-do/publications/3872971
Motor neurone disease (MND) causes the body's muscles to weaken. Breathing muscle weakness means that most people affected by MND will eventually lose the ability to take a deep breath and cough strongly....
RESPIRATORY BIOMARKERS IN MOTOR NEURONE DISEASE
The inability to breathe is unfortunately the most common cause of death in people living with Motor Neurone Disease (MND). Last year, our clinical research group in Melbourne reported that breathing...
PERTH HIGHLIGHTS: TSANZSRS 2026
A huge congratulations to all our team members who participated in the excellent workshops and meetings at the TSANZSRS Annual Scientific Meeting in Perth in March 2026!
BETTER SLEEP, BETTER LIFE TIPS
For World Sleep Day, Dr. Amy Jordan joined the "Get Cereal" panelists Sam and Matilda to share top tips for better sleep, discussing the vital importance of sleep health and hygiene in a podcast interview.
Kudos to Dr. Lauren Booker & Dr. Jen Cori on their JOEM publication examining fatigue detection alarms in rural truck drivers. Their study explores the alarms' effectiveness, accuracy, and habituation, offering key insights into fatigue management.
HONORING EXCELLENCE IN RESEARCH
Congratulations to Prof. Anne Holland and A/Prof. Narelle Cox for being featured in the NHMRC's 10 of the Best - 16th Edition. Their work exemplifies groundbreaking research delivering extraordinary outcomes.
© 2026 Institute for Breathing and Sleep. All Rights Reserved. ABN 39 093 685 879
Powered by Helmut Design | Manage
